SASR Norms & Standards Vol 2 new.indd - Sport and Recreation ...

DRAINS
Pools shall be equipped with at least two main drains, located in the deepest portion, at least 900
mm apart. The drains have to be constructed in such a way to prevent suction entrapment under all
operating conditions. An anti-vortex or an approved grate that has a minimum diagonal measurement
of 600 mm, has safe openings of at least four times the area of the drain pipe and is securely fi xed into
position to ensure that they are not readily removable by bathers, must cover each drain.
Drains have to be spaced at interval of not exceeding 6.0 metres and may not be less more than 1.50
metres from each side wall.
In addition to the above, no check valve may be installed between a suction outlet and a pump.
FLOW METER
All public swimming pools must be equipped with fl ow metres that measure the rate of backwash
through the fi lter. The fl ow meter shall be installed between the pump and the fi lter on a straight section
of pipe in accordance with the manufacturer’s instructions, in a location where it may easily read. The
meter shall measure the fl ow in litres per second and shall be accurate to within 5 % under all fl ow
conditions. The fl ow meter shall further have an indicator that is capable of readings of at least 150 %
of the normal fl ow rate.
SIGHT GLASS
Pressure fi lters systems shall have a sight glass fi tted on the waste discharge pipe.
AIR RELIEF VALVES
Pressure type fi lters shall be equipped with a means to release internal pressure. Each pressure fi lter
shall be equipped with an air relief piping system connected at an accessible point near the crown.
Automatic air relief systems may be used instead of manual systems.
The design of a fi lter with an automatic air relief system as its principal means of air release shall
include lids that provide a slow and safe release of pressure.
The design of a separation tank used in conjunction with a fi lter tank shall include a manual means of
air release or a lid that provides a slow and safe release of pressure as it is opened.
ACCESS TO EQUIPMENT
All of the above equipment (including all fi ltration equipment) has to readily accessible for inspection,
maintenance and replacement purposes.
FILTRATION
Swimming
The maximum fi ltration rate shall not exceed the design fl ow rates prescribed by the ANSIINSF Standard
50 for Commercial fi lters.
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