Easi-Pit Installation Procedure - FP McCann Ltd

FP McCann Easi-Pit Installation Procedure 

Installation Procedure – FP McCann DN1050 Easi-Pit 

This document describes the recommended procedure for the installation of FP McCann “Easi- 

Pit” DN1050 Precast Concrete Catch-Pit, used in manhole construction (with particular use in 

highways construction). For information on manhole construction see Recommended Site work 

Practice – Manhole Chambers 

FP McCann Easi-Pit 

PLANNING 

Receipt and Handling of Easi-Pits on Site 

1. Time and place of off-loading should be agreed before units arrive at site. For safety, all 

Easi-Pits are delivered in chimney fashion and must be placed on level ground (ideally 

on timber support skids but not necessary), with Easi-Pits stacked no more that 2 no. in 

height. 

2. Off-loading must be carried out using appropriate lifting equipment. It is recommended 

that clamp grabs fitted to a spreader beam are used to off-load Easi-Pits thus to avoid 

having to climb onto the trailer. 

F P McCann Ltd Easi-Pit Instal lation Procedure 

Issue date: Jan 2010 Next review d ate: Jan 2014 

V ersion 1.0 

Page 1 of 12


Off-loading the FP McCann Easi-Pit 

Spreader Bar 

Clamp Grab 

3. Off-loading should take the place at the nearest hard road to the point of installation. 

The Easi-Pit must be stored vertically on firm flat ground with the concrete base at the 

bottom. 

4. Carefully inspect units during off-loading to verify that products are undamaged and 

comply with order placed. Two types of check are required: 

Visual: Inspect the Easi-Pit for any sign of damage, including cracked or chipped 

concrete, or damage to the inlet / outlet anything that could affect the performance. 

Design: Check that the item received is the one ordered. Please note; Easi-Pits are 

generally ordered in accordance with the Predl Clock system or as specified by the 

contractor or engineer. Positions are generally specified in degrees either from 0°to 

270°. (A copy of PREDL Clock is included in Appendi x A). 

Easi-Pits are generally a bespoke product and are labeled with site references, to 

include: 

• Client / Site Name, 

• Site reference (e.g. MH 5), 

• Outlet Position 

• Production date 

F P McCann Ltd Easi-Pit Installation Procedure Version 1.0 

Issue date: Jan 2010 Next review date: Jan 2014 Page 2 of 12


5. Any Easi-Pits rejected should be labelled and stored separately with the discrepancies 

for each noted on the delivery docket and reported for further action. 

CONSTRUCTION 

The Easi-Pit is manufactured to a height of 1000 mm with a grooved joint which faces upward. 

Precast concrete manhole chambers using the tongue and groove system are laid directly on 

top of the Easi-Pit unit and constructed as normal. Inlets and outlets within standard units are at 

an invert level of 300mm above sump as specified for catch pits in the highways specification 

(however other inlet heights are available upon request). A standard drain hole is provided in 

line with highways specification. 

Catchpits are constructed in accordance to BS EN 1917 and BS 5911-3. 




FP McCann Easi-Pit Dimensions 

To ensure that the Easi-Pit and subsequent manhole structure remains vertical, accurate 

levelling of the formation and preparation of the manhole foundation is essential. 

Bedding and sidefill materials must comply with the requirements of Water Industry Specification 

BS EN 13242. 

F P McCann Ltd Easi-Pit Instal lation Procedure 

Issue date: Jan 2010 Next review d ate: Jan 2014 

V ersion 1.0 

Page 4 of 12


Sequence of Operations 

1. Excavate to formation level ensuring that sides of excavation are adequately supported. 

Trench 

Supports 

Bedding as per 

paragraph 3 

2. Trim and compact formation. 

3. Place suitable bedding material (in accordance with BS EN 13242, as above) over the 

base of the excavation to a thickness of not less than 150mm. The bedding material 

should compose of 14 mm – 5 mm graded aggregate; 10 mm nominal single size 

aggregate; concrete blinding; or as specified by local undertaker. 

4. Level and compact bedding material. The bedding (if aggregate) should be laid in 2 

layers with a whacker plate passed over each layer at least twice to compact. 

5. Check that the correct DN1050 Easi-Pit has been brought to the installation point. Cross 

reference and check pipe connection orientation with that of the catchpit. The movement 

of Easi-Pit on site must be undertaken in a manner that is safe and will not cause any 

damage to the unit in any way – the use of clamp grabs fitted to a spreader beam or 

alternatively standard lifting pins is recommended. 

6. Place the Easi-Pit unit onto the bedded surface. The outlet and manhole reference is 

clearly marked on each unit. The unit should be lowered into position. It is essential that 

the Easi-Pit with all pre-fabricated orientations is positioned according to the site layout 

plan. 




7. When placed check all pipe inlet and outlet levels and ensure that the surface of the 

Easi-Pit is level by checking the rim at the top of the base (using appropriate equipment). 

This will ensure the unit has been installed fit for purpose. 

Jointing to Pipeline 

The Easi-Pit has rubber seals which connect directly to any form of pipe. 

Perform joint as follows: 

• Ensure that the rubber seal is in position at the connection port of catchpit and pipe; 

• Lubricate the connection port on the manhole and pipe using an approved FP McCann 

pipe lubricant; 

• Push the pipe into the connection port until fully inserted; 

• Check that the seal is water tight and that the gradient and line of the pipe is acceptable. 

To allow for any differential settlement between manhole and pipeline, short rocker pipes should 

be used, and in the case of uPVC a slip collar is then used to connect the Easi-Pit to the 

pipeline. (Refer to Appendix C for a table of Seal Connectors used with Easi-Pit). 

Jointing to Manhole Chamber Sections 

Easi-Pit sections (as with manhole chambers) are provided with a tongue and groove joint 

formed within the wall section (groove facing upward). These are sealed with cement / sand 

mortar in accordance with SHW series 2400 or alternatively with proprietary non-shrink mastic 

sealant or as specified by local undertaker. As with precast concrete manholes, well jointed 

Easi-Pits provide an adequate seal under normal conditions. 

Pipe connections should be made before installation of manhole chamber ring risers. 

Erect the required number of manhole chamber rings (standard components) and seal the joints 

as appropriate; all in accordance with the design. Check that subsequent rings remain vertical. 




Place a reinforced concrete manhole cover slab on top. If required place a corbel slab and then 

add the appropriate number of adjusting units. 

Fit the manhole top for access from the ground. 

Adjusting Unit 

Manhole Cover 

Slab 

Bitumen 

Sealer 

Reinstatement 

Sidefill / in-situ concrete surround to be placed in accordance with the specified requirements of 

the particular project. 

All sidefill material to comply with the requirements of WIS 4-08-02. 

Testing 

Testing to be carried out in accordance with the specified requirements of the particular project, 

or as specified by the local undertaker. 




Appendix A – DN1050 Catchpit Highways Specification 




Appendix B – PREDL Clock 




F910 Seals for Twinwall Pipes 

Appendix C - Table of Seal Connectors 

Pipe DN Pipe Material Supplier Pipe OD 

(mm) 

Hole OD 

(mm) 

Universal 

Seals 

150 Twinwall 

Drainage 

Twinwall 

Drainage 

Wavin 178 198 1213104 

202 x 16.0 

Polypipe 178 198 1213104 

202 x 16.0 

Twinwall 

Drainage 

JFC / MAJO / 

CHERRY 

180 198 1213104 

202x16.0 

225 Twinwall 

Drainage 

Twinwall 

Drainage 

Wavin 268 294 305 x 20.0 

Polypipe 267 294 305 x 20.0 

Twinwall 

Drainage 

JFC / MAJO / 

CHERRY 

267 294 305 x 20.0 

300 Twinwall 

Drainage 

Twinwall 

Drainage 

Wavin 355 381 1821902 

396 x 20.0 

Polypipe 355 381 1821902 

396 x 20.0 

Twinwall 

Drainage 

375 Twinwall 

Drainage 

JFC / MAJO / 

CHERRY 

Universal 

Seal 

355 381 1821902 

396 x 20.0 

426 452 469 x 20.0 




F910 Seals for uPVC Pipes 


(mm) 

Hole OD 

(mm) 

Seal 

110 PVC ALL 110 138 1588606 

142 X 21.5 

160 PVC ALL 160 198 1662900 

202 X 26 

200 PVC ALL 200 226 1891706 

233 X 20 

250 PVC ALL 250 276 1891902 

287 X 20 

315 PVC ALL 315 341 1892101 

351 X 20 

F910 Seals for Clay Pipes 


(mm) 

Hole OD 

(mm) 

Seal 

150 Supersleeve Hepworth 178 198 1213104 

202 x 16 

225 Supersleeve Hepworth 263 289 187101 

299 x 20 

300 Supersleeve Hepworth 378.5 405 1842800 

422 x 20 




F910 Seals for Ductile Iron Pipe 


(mm) 

Hole OD 

(mm) 

Seal 

100 Ductile Iron ALL 118 144 1813704 

148 X 20 

150 Ductile Iron ALL 170 196 1568201 

202 X 20

Easi-Pit Installation Procedure - FP McCann Ltd

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