Components for sanitary system - Watts Industries

Section - E 

Components 

for sanitary 

system

COMPONENTS FOR SANITARY SYSTEM 

EXAMPLE OF APPLICATION 

2 

4 

2 

3 

E 

1 

1 Pressure reducer valves. 

2 Mini water hammer arrestor. 

3 Water hammer arrestor. 

4 Water hammer arrestor.


PRESSURE REDUCING VALVES 

DRV 

Diaphragm pressure reducing valve with compensated seat and complete with unions. 

Brass CW617N body and cap. Stainless steel strainer. 1/2“ - 3/4“ - 1” = 600 

1.1/4“ - 1.1/2“ - 2“ = 750 . Plastic valve seat. Interchangeable filter-regulator unit. 

Max. inlet pressure: 25 bar. Adjustable downstream pressure: 1.5 - 6 bar. Can be used for 

water, air and neutral gases up to 70°C. Pressure drops less than 1.3 bar at characteristic 

flow rate DIN. Noise < 20 dB - Class 1 in Germany. 

According to DVGW, SVGW, TIN, NF (only for ND 1/2" and 3/4"). 

Type Part number Size body Box Qty 

DRV 0501115 1/2" MM 10 

DRV 0501120 3/4" MM 10 

DRV 0501125 1" MM 10 

DRV 0501132 1.1/4" MM 1 

DRV 0501140 1.1/2" MM 1 

DRV 0501150 2" MM 1 

DRVN 

Patented diaphragm pressure reducing valve with compensated seat, outlet pressure 

adjusting knob and external graduated scale for easy reading of set pressure. 

Complete with unions. Body and cap of shot-blasted stamped brass CW617N. 

Stainless steel filter cartridge. Pressure gauge connection on both sides: 1/4". 

Materials in contact with fluids KTW certified. Max. inlet pressure: 25 bar. 

Adjustable downstream pressure: 1.5 and 6 bar. 

Max. operating temperature: 70°C. Can be used for water, air and neutral gases. 

Noise < 20 dB - Class 1 in Germany. 

According to DVGW. 


DRVN 0502515 1/2" MM 10 

DRVN 0502520 3/4" MM 10 

DRVN 0502525 1" MM 10 

DRVN 0502532 1.1/4" MM 1 

DRVN 0502540 1.1/2" MM 1 

DRVN 0502550 2" MM 1 

DRVE 

Single seated pressure reducing valves with female connections. Brass CW617N body. 

High impact plastic cap. Max. inlet pressure : 25 bar. 

Adjustable downstream pressure : 1.5 - 6 bar. 

Diaphragm pressure reducing valve, compact design. Brass CW617N body. 

Max. upstream pressure: 25 bar. Adjustable downstream pressure : 1.5 - 6bar. 

Max fluid temperature : 70°C 

3 

E 


DRVE 0502020 3/4" FF 1 

Cavitation diagram for pressure reducing 

valves series DRV 20 

CAVITATION 

The cavitation diagram shows three operating zones of the pressure reducing valve 

plotted against the upstream and downstream pressures, namely : 

Zone C : normal duty, no cavitation 

Zone B : medium duty, risk of cavitation 

Zone A : heavy duty, the pressure reducing valve shows cavitation. 

Continuous operation in the red cavitation zone could cause rapid damage of the 

internal parts. 

SIZING 

Example 1 (cavitation) 

Pressure reducing valve with : Inlet pressure P1 = 14 bar- Outlet pressure P2 = 3 bar. 

From the cavitation diagram it can be seen that the pressure reducing valve is 

constantly working in the red zone. To avoid rapid deterioration, two pressure 

reducing valves could be used, one connected upstream to the other. 

Upstream pressure reducing valve: pressure front from 14 to 6 bar (green zone). 

Downstream pressure reducing valve: pressure front from 6 to 3 bar (green zone). 

A Cavitation zone B Transition zone C Work zone 

(bar) 

Inlet pressure 

18 

16 

14 

12 

10 

8 

6 

4 

A 

B 

C 

2 

0 

0 1 2 3 4 5 6 7 

Downstream pressure 

(bar)



4 

DRV/E-COMPRESSION 

Diaphragm pressure reducing valve, compact design. 

Brass CW602N body (anti-dezincification alloy), with male connections complete with swivel nut: 

Pipe dia. 15 and 22. Gauge connection 1/4”. Max. upstream pressure : 25 bar. 

Adjustable downstream pressure: 1.5 - 6 bar. Max. fluid temperature : 70°C. 

Can be used for water, compressed air. Mounting in any position. 

WRAS approved. 


DRV/E 0502115 15 10 

DRV/E 0502120 22 10 

REDUFIX 

Diaphragm pressure reducing valve, designed for protecting electrical heating appliances 

or appliance for domestic hot water production. Anti-dezincification (anti-corrosion)brass 

body, especially suitable for single users. Gauge connection 1/4”female. 

Can be installed in all positions. Max. upstream pressure: 15 bar. Max. temperature: 70 °C. 

E 

Type Part number Factory set @ Size body Box Qty 

REDUFIX 82000 4 bar 1/2" F/F 25 

REDUFIX 82005 3.5 bar 1/2" F/F 25 

REDUFIX 82006 2 bar 1/2" F/F 25 

REDUFIX 82007 3 bar Dual 3/4” M/M & 1/2” F/F 25 

REDUFIX 82110 3 bar 3/4" M/M 25 

REDUFIX 82210 4 bar 3/4" M/F union nut 25 

REDUFIX 82212 3 bar 3/4" M/F union nut 25 

REDUFIX 82213 3.5 bar 1/2" M/F 25 

ECOFLUX 

Pressure reducing valve for domestic, commercial and industrial fluid systems, compact design. 

DZR brass body with gauge connection 1/4” female. Max. upstream pressure: 15 bar 

Adjustable downstream pressure: 2.0 – 5.5 bar. Max temperature: 70ºC. 


ECOFLUX 87000 1/2” FF 10 

ECOFLUX 87110 3/4” MM 10 

ECOFLUX 87210 3/4” M/F union nut 10 

REDUFIX chart



REDUPRESS 

Diaphragm pressure reducing valve, compact design. DZR brass body with two gauge connections 

1/4” female. Min. temperature 1ºC. Max. temperature 80ºC. High Pressure model: 

Max. upstream pressure 16 bar. Min. outlet pressure: 1.5 bar. Max. outlet pressure: 5.5 bar. 

Low Pressure model: Max. upstream pressure 8 bar. Min. outlet pressure: 0.5 bar. Max. outlet 

pressure: 2.5 bar. 

Type Part number Presssue Range Size body Box Qty 

REDUPRESS 81106 Low Pressure 1/2" FF 20 

REDUPRESS 81100 High Pressure 3/4" FF 20 

REDUPRESS 81103 Low Pressure 1" FF 20 

REDUPRESS 81116 High Pressure 1-1/4" FF 20 

REDUPRESS 81200 Fixed @ 3.5 bar 1-1/2" FF 20 

5 

U5B 

Diaphragm pressure reducing valve. Watts U.S. Patent N° 3. 115. 154. Heavy duty bronze 

series, with large built-in filter and separate connection for quick maintenance. Internal by-pass 

for upstream discharge of any downstream overpressures. Bronze body, cast iron cap. 

Stainless steel filter and seat. Diaphragm made of Nordel reinforced with Nylon fibres. Max. 

inlet pressure: 20 bar. Adjustable downstream pressure: 1.5 - 5 bar. Can be used for water, air 

and neutral gases up to 80°C. 

According to ASSE, ANSI, CSA, UPC. 


U5B EDP0052979 1/2" FF 1 

U5B EDP0059879 3/4" FF 1 

U5B EDP0053200 1" FF 1 

U5B EDP0054140 1-1/4" FF 1 

U5B EDP0054358 1-1/2" FF 1 

U5B EDP0059883 2" FF 1 

PRECISIO 

Bracketed diaphragm pressure reducing valve; complete with 2 pressure gauge connections 1/4"F. 

Reduces the pressure without lowering the flow rate.Rugged and reliable unit not requiring 

maintenance.Complies with comfort and acoustic standards. Plug connected to diaphragm through 

bracket. Pressure set through PHILLIPS screw. Its compact size allows interchangeability with most 

of the pressure reducing valves on the market. Brass DZR (corrosion-resistant) body. 

Max. inlet pressure : 16 bar. Adjustable downstream pressure: 1.5 to 5.5 bar 

Max. operating temperature: 80° C. 


PRECISIO 86201 1/2" FF 1 

PRECISIO 86200 3/4" FF 1 

PRECISIO 86211 3/4" MM 1 

PRECISIO 86210 3/4” MM 1 

PRECISIO 86215 3/4" Female swivel x Male 1 

E 

Pressure reducing valves covered by WATTS US PATENT N° 3,115,154 

BY-PASS 

EXPANSION 

UPSTREAM 

PRESSURE 

REDUCED PRESSURE 

PROTECTIVE BY-PASS 

PLUG 

UPSTREAM 

DOWNSTREAM 

UPSTREAM 

DOWNSTREAM 

ABSENCE OF FLOW 

ABSENCE OF FLOW 

DOWNSTREAM PRESSURE TENDS TO FALL 

DOWNSTREAM PRESSURE TENDS TO RISE



6 

SERIES 223 

Pressure reducing valve with highly sensitive spring and large diaphragm that permits 

accurate adjustment. High temperature diaphragm for both hot and cold water. 

Bronze body screwed BSP female, Stainless Steel Seat. 

Max. upstream pressure: 20 bar. Adjustable downstream pressure: 1.5 – 6.0 bar. 

Min. temperature 1ºC. Max. temperature 70ºC. 

Upon request available with Low and High Pressure versions. 


223 EDP296239 1/2" FF 1 

223 EDP296155 3/4" FF 1 

223 EDP296603 1" FF 1 

223 EDP296865 1-1/4" FF 1 

223 EDP296154 1-1/2" FF 1 

223 EDP297448 2” FF 1 

223 EDP305735 2-1/2” FF 1 

223 EDP303646 3” FF 1 

SERIES SS-263AP 

E 

Compact stainless steel pressure reducing valve for deionised water purification, chemical 

handling, high purity, water purification systems and low pressure steam 15 psi (1.0 bar) 

applications. Rugged investment cast stainless steel body and spring cage, with gauge 

connection 1/4” female, stainless steel adjusting screw, oversized orifice. End connection 1/2” 

NPT female. Max. upstream pressure: 28 bar. Min. temperature 17.8ºC. 

Max. temperature 49ºC. 

Upon request available with Viton Seals. 

Type Part number Outlet presssure range Supplied set at Box Qty 

SS-263AP EDP0335115 1 – 25 psi 10 psi 1 




SERIES P50/P60 

Miniature pressure reducing valve in corrosion proof acetal plastic, all internal metal components 

in contact with the fluid are stainless steel. 

P50 – Multi-purpose pressure regulator for general use. 

P60 – Balanced piston design for applications where a constant downstream pressure and 

accurate flow performance are required. 

Connections 1/4” BSP female. 

Max. upstream pressure: 21 bar. 


Type Part number Outlet presssure range Supplied set at Box Qty 

P50 EDP0354551 0 – 25 psi 15 psi 1 

P50 EDP0354552 0 – 60 psi 40 psi 1 

P50 EDP0354553 0 – 125 psi 50 psi 1 

P60 EDP0354554 0 – 25 psi 15 psi 1 

P60 EDP354555 0 – 60 psi 40 psi 1 

P60 EDP354556 0 – 125 psi 50 psi 1 

P60 4WAY EDP354591 0 – 60 psi 40 psi 1 

P60 4WAY EDP354592 0 – 125 psi 50 psi 1



MOV809T-143 

Pressure reducing valve brass body and diaphragm, stainless steel seat, NBR O-rings, two 

gauge connections 1/4” BSP female. 



7 


809T-143 M11200 1/2” FF 1 

809T-143 M11201 3/4” FF 1 

MOV809T-146 

Pressure reducing valve brass body and diaphragm, stainless steel seat, NBR O-rings, two 

gauge connections 1/4” BSP female. 




809T-146 M11300 1/2” FF 1 

809T-146 M11301 3/4” FF 1 

809T-146 M11302 1” FF 1 

809T-146 M11303 1-1/4” FF 1 

809T-146 M11304 1-1/2” FF 1 

809T-146 M11305 2” FF 1 

E 

MOV809T-150 

Pressure reducing valve bronze body and diaphragm, stainless steel seat, two gauge 

connections 1/4” BSP female. 



WRAS APPROVED PRODUCT 1/2” & 3/4” ONLY. 


809T-150 M11400 1/2” FF 1 

809T-150 M11401 3/4” FF 1 

809T-150 M11402 1” FF 1



8 

PRV115 

Pilot operated pressure reducing valve designed to reduce a higher upstream pressure to a 

constant lower downstream pressure. This very accurate valve is deisgned to operate with a 

minimum of maintenance. The only moving parts in the valve are the diaphragm and the stem 

assembly, which are guided by an exchangeable bearing in the cover and the valve seat. The 

Watts PRV115 is easy to install and adjust. 

Type Part number Size body PN Box Qty 

PRV115 500050546 50 10/16 1 

PRV115 500065546 65 10/16 1 

PRV115 500080546 80 10/16 1 

PRV115 500100546 100 10/16 1 

PRV115 500125546 125 10/16 1 

PRV115 500150546 150 10/16 1 

PRV115 500200546 200 10 1 

PRV115 505200546 200 16 1 

E 

PRESSURE LOSS CURVE 

CAVITATION CURVE


AUTOMATIC CONTROL VALVES 

EU100 RANGE 

Automatic self-acting control valves designed for regulating water flow in water pipelines, such 

as: Waterworks, irrigation, fire-fighting, process plants, etc. 

The main functions performed by the valve (also valve combinations) are as follows: 

- Shut-off - check - reduction, stabilization of the pressure - relief, overpressure 

- pressure support - level control - flow control. 

The more advanced models are equipped with a central control unit (EU900), of AISI 303 

stainless steel construction, which allows the regulating action to be performed as required by 

setting the flow opening and closing speeds as well as the response gradient to the deviations. 

The pilot devices serve for determining the type of function and the set-point of the parameter 

under control. All valves are provided with visual indication of the valve plug stem position. 

9 

Technical characteristics common to all models 

Valve body and cover 

Stem guide in the cover 

Malleable cast iron GGG40 with 

full epoxy lining 150 µ 

Self-lubricating bronze 

Inner valve parts Steel AISI (316, 303, 302) 

Piattelli membrana Steel ASTM AA 36 (DN 50-150) 

or cast iron GGG25 (DN 200-600) 

with full epoxy lining 

Plug seal and diaphragm 

Body and cover, pilot device 

Nitrile rubber BUNA N 70 Sh 

Nickel-plated bronze 

E 

Piping and fittings, pilot circuit Nickel-plated brass 

Minimum operating 

0.25 bar (standard spring) 

differential pressure 

0.50 bar (reinforced spring) 

Max. operating temperature 70 °C 

OPERATING PRINCIPLES 

The self-acting valves of Series EU100 consist of a main two-way 

body of globe type Fig 1, whose flow section is controlled by a 

shaped plug actuated by the energy supplied by the flow under 

control through a diaphragm inserted between the body and cover to 

form the operating chamber. When a small quantity of the fluid flows 

through the water control circuit, this circuit places the following ports 

in communication with each other : 

- upstream port with pressure generally higher 

- downstream port with pressure generally lower 

- port of the operating chamber with regulated intermediate pressure. 

EU900 

1 Outlet connection towards the control chamber 

2 Setting of closing speed 

3 Setting of opening speed 

4 Outlet connection towards the pilot 

5 Calibration of the gradient of response to deviations 

6 Inlet connection of the upstream port 

7 Positioning of plate padlock 

An adjustable throttle is installed at the outlet of the upstream port, 

and before communication with the operating chamber. The pilot 

device is installed at the inlet of the downstream port. When the pilot 

device is fully open Fig 2 it allows direct discharge of the operating 

fluid coming from the upstream port; this causes a drop in pressure 

due to the throttling and determines a low level of pressure in the 

operating chamber and discharge of the latter. 

The valve plug is raised to full opening position, thrust by the fluid 

under control. The fully closed pilot device Fig 3 causes the same 

high pressure present on upstream side to be present in the 

operating chamber (throttling with zero flow does not cause drops) 

and determines the fluid under control to be shut-off. 

When the pilot device is in intermediate position Fig 4 it allows partial 

discharge of the operating fluid coming from the upstream port; this 

produces a proportional drop in pressure due to the throttling and 

determines, in the operating chamber, an intermediate level of 

pressure and volume. Hence the valve plug modulates the lifting of 

the valve plug (in opening or in closing) thus ensuring that the 

required levels of flow or pressure are reached. 

Fig. 1 Fig. 2 

Fig. 3 Fig. 4



10 

EU115 PRESSURE REDUCING VALVE 

Self-acting diaphragm valve serving to reduce and stabilize the downstream pressure. 

The higher, upstream pressure is adjusted, on downstream side, to a lower and constant 

level even in the presence of upstream overpressure and/or variations in flow rate. 

Version with needle valves. Adjustment range of pilot device : 

STANDARD : 1.4 - 12.0 bar. 

On request : 0.1 - 2.0 bar 

7.0 - 21.0 bar (stainless steel version) 

The additional non-return function is available on request (EU115-3). 

Also available with regulator unit EU900 

Size range: 50mm to 600mm 

Type Part number Size body PN Box Qty 

EU115 500050550 50 10/16 1 

EU115 500065550 65 10/16 1 

EU115 500080550 80 10/16 1 

EU115 500100550 100 10/16 1 

EU115 500125550 125 10/16 1 

EU115 500150550 150 10/16 1 

EU115 500200550 200 10 1 

E 

ALSO AVAILABLE: 

EU115-02 PRESSURE REDUCING/SUSTAINING VALVE 

Reduces a higher upstream pressure to a constant lower downstream pressure but will close 

to maintain the upstream pressure should the supply pressure fall below a set point. 

EU115-03 PRESSURE REDUCING VALVE WITH CHECK VALVE 

Reduces a higher upstream pressure to a constant lower downstream pressure. When the 

downstream pressure exceeds the upstream pressure the main valve closes. 

EU115-04 PRESSURE REDUCING VALVE SOLENOID OPERATED 

Pressure reducing valve with a solenoid operated On/Off function that can be controlled 

remotely via an electrical signal. 

EU115-07 PRESSURE REDUCING VALVE 

Pilot operated Pressure Reducing Valve/Surge Valve for rapidly decreasing flow rate systems. 


Pilot operated Pressure Reducing and Sustaining Valve with solenoid On/Off function. 


Pilot operated Pressure Reducing Valve with Low Pressure Shut-Off function. 

EU115HL-AS PRESSURE REDUCING VALVE 

Dual Set point Pressure Reducing Valve Auto Shift for low and high flow demands.



EU116 PRESSURE SUSTAINING/RELIEF VALVE 

Self-acting diaphragm valve serving to hold the downstream pressure at a constant 

and adjustable level. When the level of upstream pressure tends to decrease, it is held by 

gradually reducing the flow rate; instead when the downstream pressure level tends to 

increase, it is held by gradually increasing the flow rate at the outlet (relief or overpressure 

function). Version with needle valves. Adjustment range of pilot device : 

STANDARD : 1.4 - 12.0 bar 

On request : 0.1 - 2.0 bar or 7.0 - 21.0 bar 

The additional non-return function is available on request (EU116-3). 

11 




EU116-31 PRESSURE SUSTAINING/RELIEF VALVE 

Pressure Sustaining/Relief valve which maintains a constant upstream pressure by 

relieving excess upstream pressure to the downstream side of the valve. The solenoid 

operated On/Off function can be operated via an electrical signal to override the 

sustaining/relief function. 


Low Pressure Shut-off valve with manual reset closes when the downstream pressure drops 

below a (adjustable) set point. The manual reset permits the valve opening to restore downstream 

pressure. 

E 


Pressure Sustaining/Relief valve with Check Valve function. 


Pressure Differential Relief valve. 


Surge Anticipation Control valve.



12 

EU114 RATE OF FLOW CONTROL VALVE 

Self-acting diaphragm valve serving to control the flow rate passing the valve at a 

constant and settable value: normally the maximum acceptable drawing off value is held. The 

flow rate is monitored continuously through a calibrated flange located upstream of the valve, 

whose piezometric sockets are connected to the special pilot device which also allows 

setting with a differential pressure gauge. Version with needle valves. Obviously the 

available flow rate range (see table below) depends on the ND and calibrated 

flange; therefore it should be stated when ordering. 

Range of differential pressure adjustment withSTANDARD pilot device: 0.2 - 1 bar. 

E 

Chart set flanges 

EU114 

ND Flow rate m 3 /h 

50 4 - 10 

10 - 25 

25 - 35 

65 12 - 37 

15 - 45 

80 10 - 25 

20 - 40 

30 - 50 

35 - 55 

45 - 75 

100 30 - 45 

30 - 80 

125 35 - 120 

150 35 - 120 

60 - 200 

200 110 - 280 

Other models on request. 




EU114-01 RATE OF FLOW CONTROL VALVE WITH SOLENOID 

Rate of Flow Control valve maintains an adjustable maximum constant flow rate independent 

of the inlet pressure. 

The solenoid operated On/Off function can be operated via an electrical signal to override the 

rate of flow control function. 

EU114-02 RATE OF FLOW CONTROL/PRESSURE REDUCING VALVE 

Rate of Flow Control/Pressure Reducing valve maintains an adjustable constant flow rate 

and reduces a higher upstream pressure to a constant lower downstream pressure. 

EU114-08 RATE OF FLOW CONTROL/PRESSURE SUSTAINING VALVE 

Rate of Flow Control/Pressure Sustaining valve maintains an adjustable constant flow rate 

and prevents that upstream pressure dropping below a set point. 

EU114-03 RATE OF FLOW CONTROL VALVE 

Pilot operated Rate of Flow Control with check valve function. 

EU117 RATE OF FLOW CONTROL VALVE 

Pilot operated excess flow shut-off.



EU127 ALTITUDE VALVE 

Self-acting diaphragm valve with function of piezometric level control for the tank 

(piezometric tower). The valve closes the flow when max. level is reached, then it is 

reopened proportionally with a variable proportional band from 0.3 to 1.0 m w.g. depending on 

the adjustment range chosen. The piezometric pilot device is fastened to the main valve 

located at the bottom of the tank and is connected to the latter with piezometric tubes 

(not included in the supply). Version with needle valves. Adjustment range of pilot device : 

STANDARD: 3 - 20 m w.g. 

On request : 1 - 6 m.w.g. or 15-65 m.w.g. 

13 




EU127-01 ALTITUDE VALVE 

Pilot operated Altitude valve maintains a constant (adjustable) level. If the water is drawn 

from the reservoir, head pressure is lowered and the main valve opens. Opening and closing 

speed adjustable. 

EU127-08 ALTITUDE VALVE 

Pilot operated Altitude valve with Pressure Sustaining function. 

E



14 

EU110-14 LEVEL CONTROL VALVE 

Self-acting diaphragm valve with function of float type level control for storage tanks in 

general. The valve closes the flow when max. level is reached, then reopens it at minimum 

level. Version with needle valves. The float pilot device is normally placed inside 

the tank while the main valve it is at bottom of the tank. The float operating rod allows 

setting the differential between max. and min. levels between 0.5 and 2.0 metres. 

Standard rod length 2 metres. 



E 


Like series EU 110-14 but with reverse operation : it opens the flow at max. level and 

closes it at minimum level (overflow version). Version with needle valves. 





Pilot operated Float valve with Flow Control function.



EU113 SOLENOID ON/OFF VALVE 

Self-acting diaphragm valve serving to shut off the flow rate through the valve via 

a remote electrical control. The pilot circuit is provided with a solenoid valve, whose 

function must be stated whether as normally open (NO) or normally closed (NC). 

Version with needle valves. The additional non-return function is available on request. 

15 




EU113-08 SOLENOID OPERATED LEVEL CONTROL VALVE 

Solenoid operated Level Control valve to maintain constant level in reservoir. If water is drawn 

from the reservoir then the level sensor will switch the solenoid allowing the main valve to open 

thus refilling the reservoir. 

Also suitable as overfill protection; pump protection; high level alarm. 

EU113-19 BOOSTER PUMP CONTROL VALVE 

Booster Pump Control valve with Pressure Sustaining and Check valve function. 

Maintains a constant back pressure to pump. 

Valve closes when discharge pressure exceeds inlet pressure (power failure or pump failure). 

Opens at a controlled rate on pump shut-off (adjustable). 

EU113B FIRE PROTECTION VALVE 

Fire Protection valve opens when the mains power fails. 

Manual operation in case of power system failure. 

E


FC CHECK VALVE 

16 

FC 

Spheroidal cast iron check valve with flanged connections. 

Check function controllable according to EN 13959. 

Field of application : 

- as anti-pollution device in drinking water supply with EA protection according to EN1717 

- as non return (check) valve in all hot and cold domestic water supply circuits, in distribution 

networks of fluid operating in the systems, in pumping stations, etc. 

Operating pressure : 16 bar. 

Max. temperature : 70°C. 

Min. temperature : 4°C. 

Spheroidal cast iron body. 

Pull-out polymeric functional device (Check). 

Elastomeric parts : NBR. 

Other components: stainless steel. 

Approvals : Belgaqua. 

E 


FC 308065361 65 1 

FC 308080361 80 1 

FC 308100361 100 1 

FC 308125361 125 1 

FC 308150361 150 1 

FC 308200361 200 1 

FC 308250361 250 1 

FC hydraulic characteristic


WATER HAMMER ARRESTORS 

SERIES 05 

Mini sliding piston water hammer arrestor in sealed copper tube. 

Can be installed in any position. Does not require maintenance. 

Suitable for washing machines, dish washers, sinks, sanitary systems, etc. 

Nickel-plated copper body. Acetal resin piston. Connection BSP Male. 

Precharged pressure: 4 bar. Operating pressure: 10 bar. Max. temperature: 85°C. 

17 

Type Part number Size body Protection Box Qty 

05 EDP750019 / 20260 1/2" M A 1 

SERIES 15 

Water hammer arrestor like Series 05 but with double sealed brass piston (O-ring and 

EPDM).Connection BSP Male. Precharged pressure: 20 bar. Max. temperature: 110ºC. 

According to ASSE, ANSI, PDI. 


15 EDP750014 1/2" M A 1 

15 EDP750022 3/4" M B 1 

15 EDP750052 1" M C 1 

15 EDP750071 1-1/4" M D 1 

15 EDP750091 1-1/2" M E 1 

15 EDP750111 2" M F 1 

SERIES 150A 

E 

Water hammer arrestor designed for washing machines, dish washers, sinks, sanitary 

systems, etc. Can be installed in any position. Painted stainless steel body. 

Elastomeric diaphragm. Connection BSP Male. Max. temperature: 90°C. 

Precharged pressure: 2 bar. Capacity: 0.16 litres. 


150A EDP0269503 1/2" M A 1 

Selection of water hammer arrestors 

Each model of the Water Hammer Arrestors is able to offer a certain cushioning action (table 1); therefore to assist in the 

choice we have given in table 2 the unit load values assigned to each shut-off component normally installed in the hot and 

cold water systems. 

N.B. Install the Water Hammer Arrestor as close as possible to the shut-off component causing the water hammer. 

Table 1 

SELECTION OF WATER HAMMER ARRESTOR ACCORDING 

TO THE UNIT LOAD NUMBER 

Series Size Protection Unit load 

05 – 15 – 150A 1/2" M A 1 - 11 

15 3/4" M B 12 - 32 

15 1" M C 33 - 60 

15 1-1/4" M D 61 - 113 

15 1-1/2" M E 114 - 154 

15 2" M F 155 - 330 

BATH SUITE complete with quick flushing = 8 load units - 1 

Series 05 or Series 150A 

Table 2 

APPLIANCE 

Quick flushing WC 

Float WC 

Wash basins 

Bath 

Bidet 

Shower 

Washing machine/dish washer 

Kitchen sink 

Bath suite c/w quick flushing WC 

Bath suite c/w with float WC 

UNIT LOAD 

6 

3 

1 

2 

1 

1 

2 

2 

8 

6


SAFETY VALVES AND ACESSORIES FOR UNVENTED SYSTEMS 

18 

EURO STAB 

Safety unit with straight body for water heater, complete with safety valve, shut-off valve 

(to isolate the water heater from the supply line), inspectable check valve (to prevent return 

of contaminated water in the supply line), lever for manual discharge via the safety valve. 

Item marked * WRAS APPROVED 

Type Part number Size body Set at Body Box Qty 

EURO STAB 52550UK* 1/2" MF 6 bar Chrome 1 

EURO STAB 52550 3/4" MF 7 bar Chrome 1 

EURO STAB 52570 3/4" MF 7 bar Stainless 1 

GSAT ELBOW 

Safety unit for water heater, like EURO STAB but with angle body. 

Discharge connection: 1” M. 

E 


GSAT ELBOW 50045 3/4" MF 6 bar Chrome 1 

GSAT ELBOW 52571 3/4" MF 7 bar Stainless 1 

GSM 

Safety unit with angle body for water heaters, complete with safety valve, inspectable check 

valve (to prevent return of contaminated water in the supply line), lever for manual discharge 

via the safety valve. 

Discharge connection : 1” M. 

Item marked * WRAS APPROVED 


GSM 54557* 1" MF 6 bar Chrome 1 

GSM 54555 1" MF 7 bar Chrome 1 

UKM 

Combined check valve (to prevent return of contaminated water in the supply line), expansion 

relief valve, expansion vessel connection and gauge point. 

Picture shows UKM attached to a 3/4” REDPRUSS pressure reducing valve, fixed outlet 

pressure 3.5 bar Part number 81200 (not included). 


UKM 51356 3/4” x 22mm x 3/4”swivel x 15mm 3 bar Chrome 1 

UKM 51353 3/4” x 22mm x 3/4”swivel x 15mm 6 bar Chrome 1 

SKD 

Discharge siphon for safety units Eurostab, GSAT ELBOW and GSM. 

White polypropylene body. 


SKD 92315 1" 1


CHAPTER E 

DRV 

DRVN 

19 

ND L L1 H H1 

1/2” 97 152 135 48 

3/4” 110 171 155 58 

1” 120 191 182 66 

1.1/4” 140 211 227 75 

1.1/2” 160 246 255 82 

2” 175 261 262 88 

DRVE 

ND L L1 H H1 

1/2” 84 135 113 48 

3/4” 94 151 133 58 

1” 104 170 140 66 

1.1/4” 109 175 192 75 

1.1/2” 134 214 200 82 

2” 144 224 205 88 

DRV/E-COMPRESSION 

E 

ND A B C D 

3/4” Ø 45 112 77,5 75 

ND A B C D 

15 Ø 45 105 77,5 86,5 

22 Ø 45 105 77,5 92

OVERALL DIMENSIONS 

CHAPTER E 

20 

U5B 

ND L H H1 

1/2” 146 175 48 

3/4” 162 784 48 

1” 171 203 51 

1.1/4” 203 213 57 

1.1/2” 241 248 76 

2” 279 311 83 

E 

REDUFIX 

PRECISIO 

ND L A B C 

1/2”FF 76 30,5 115 72 

3/4”FF 76 30,5 115 72 

3/4”MM 100 30,5 115 72


CHAPTER E 

PRV115 

21 

NO. NAME 

1 Body/Main valve 

2 Fixed orifice 

3 Flow strainer 

4 Pilot valve 

5 Air vent 

6 Flexible tubing 

E 

DN PN A B1 B2 C1 C2 Kg 

50 10/16/25 230 160 85 165 85 20 

65/60 10/16/25 290 170 85 165 95 25 

80 10/16/25 310 175 85 165 100 30 

100 10/16 350 190 120 210 110 40 

100 25 350 190 120 210 120 40 

125 10/16 400 200 150 285 125 70 

125 25 400 200 150 285 135 70 

150 10/16 480 210 150 285 145 90 

150 25 480 210 150 285 150 90 

200 10 600 235 200 360 170 150 

200 16 600 235 200 360 170 150 

200 25 600 235 200 360 180 150 

250 10 730 280 255 475 200 400 

250 16 730 280 255 475 200 400 

250 25 730 280 255 475 215 410 

DN PN A B1 B2 C1 C2 Kg 

300 10 850 305 300 570 230 550 

300 16 850 305 300 570 230 550 

300 25 850 305 300 570 245 570 

350 10 980 330 300 570 255 560 

350 16 980 330 300 570 260 560 

350 25 980 330 300 570 280 580 

400 10 1100 360 355 700 285 1100 

400 16 1100 360 355 700 290 1100 

400 25 1100 360 355 700 310 1150 

500 10 1250 420 405 800 335 1250 

500 16 1250 420 405 800 360 1250 

500 25 1250 420 405 800 365 1300 

600 10 1450 460 455 850 390 1550 

600 16 1450 460 455 850 420 1550 

600 25 1450 460 455 850 425 1600


CHAPTER E 

22 

EU100 

FC 

E 

ND NP A B1 B2 C1 C2 

50 10/16 230 160 85 265 85 

60 10/16 290 170 85 265 95 

65 10/16 290 170 85 265 95 

80 10/16 310 175 85 265 100 

100 10/16 350 190 120 310 110 

125 10/16 400 200 150 385 125 

150 10/16 480 210 150 385 145 

200 10/16 600 235 200 460 170 

250 10/16 730 280 255 570 200 

300 10/16 850 305 300 650 230 

350 10 980 330 300 650 255 

350 16 980 330 300 650 260 

400 10 1100 355 360 800 285 

400 16 1100 355 360 800 290 

500 10 1250 405 420 900 335 

500 16 1250 405 420 900 360 

600 10 1450 455 460 950 390 

600 16 1450 455 460 950 420 

TYPE A B C D E F G H 

FC065 290 G1/2 145 37.5 185 118 145 4x19 

FC080 310 G1/2 155 44 200 132 160 8x19 

FC100 350 G1/2 175 65 220 156 180 8x19 

FC125 400 G1/2 200 47 250 184 210 8x19 

FC150 480 G1/2 240 87 258 211 240 8x23 

FC200 600 G1/2 300 71 340 266 295 12x23 

FC250 730 G1/2 365 102 405 319 355 12x28


CHAPTER E 

EURO STAB 

23 

SERIES15 

SERIES150A 

SERIES05 

E 

ND A B 

1/2” 152 37 

3/4” 200 48 

1” 216 56 

1.1/4” 275 68 

1.1/2” 292 84 

2 378 ??? 

ND A B 

1/2” 110 87 

ND A B 

1/2” 133.3 23.5

Watts Industries UK Ltd 

Grosvenor Business Park, Evesham, Worcestershire, WR11 1GA, England 

Phone +44 (0) 1386 446997 - Fax +44 (0) 1386 41923 

Email sales@wattsindustries.co.uk - www.wattsindustries.com

Components for sanitary system - Watts Industries

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?