Drainage inspection chamber f w g r w

Drainage inspection chamber f. w. g. r. w. p Combined system s. v. p r. w. g r. w. p f. w. g Separate system f. w. g. r. w. g f. w. g r. w. p Partially separate system soakaway or drainage ditch (alternative surface water discharge) Below ground drainage From Plumbing (3 rd edition), R. D. Treloar, page 329 Copyright Blackwell Publishing Ltd, all rights reserved: www. blackwellpublishing. com surface water drain foul water sewer s. v. p r. w. p surface water sewer f. w. g r. w. g f. w. g. foul water sewer foul and surface water sewer s. v. p r. w. p

Drainage G/L 200 mm 150 mm min 100 mm Key 100 mm class ‘b’ bedding class ‘f’ bedding Bedding for rigid pipes Bedding for flexible pipes flexible joints arch or lintelled opening soil 50 mm space around pipe granular material 600 mm max 150 mm Drains penetrating a wall 600 mm max 150 mm selected fill with no stones largers than 40 mm selected fill with no lumps of clay, large stones or frozen and vegetable matter Pipes run close to the building concrete From Plumbing (3 rd edition), R. D. Treloar, page 331 Copyright Blackwell Publishing Ltd, all rights reserved: www. blackwellpublishing. com Protection of pipework rigid sheet material

Drainage galvanised sediment bucket copper float waste pipe gully hopper gully trap cork float bronze flap Anti-flood gully Trapped gully ‘Eureka’ trunk valve Garage gully (valve open) perforated tray stopper Trapless gully dosing point outlet baffles Grease trap rodding access inlet Grease converter Gullies and traps From Plumbing (3 rd edition), R. D. Treloar, page 333 Copyright Blackwell Publishing Ltd, all rights reserved: www. blackwellpublishing. com intercepting trap

Drainage access cover rodding point inspection cover Access door of soil pipe access covers benching cut to the required height plastic chamber Inspection chambers Provision for access From Plumbing (3 rd edition), R. D. Treloar, page 335 Copyright Blackwell Publishing Ltd, all rights reserved: www. blackwellpublishing. com channel brick built chamber

Drainage block inserted in the upper half to minimise surcharging saddle junction block benching 2: 1 sand–cement encased in concrete open channel 0. 68 mm max access bend Ramp cast iron or plastic pipe within chamber access point clayware encased in concrete rest bend drain at lower level Back-drop connections Connections to existing systems From Plumbing (3 rd edition), R. D. Treloar, page 337 Copyright Blackwell Publishing Ltd, all rights reserved: www. blackwellpublishing. com benching

Drainage timber plank 25 mm 1 mm spirit level cut as shown to make a Gradient board to a fall of 1: 40 traveller gradient board sight rail branch drainage pipe bedding material operative sighting between sight rails and instructing colleague to raise or lower the pipe operative removing or inserting bedding material to raise or lower the pipe. fall of drainage run sight rail level plain traveller water pipe sight rail Laser level drainage pipe bedding material From Plumbing (3 rd edition), R. D. Treloar, page 339 Copyright Blackwell Publishing Ltd, all rights reserved: www. blackwellpublishing. com Determining drainage levels

Drainage From Plumbing (3 rd edition), R. D. Treloar, page 341 Copyright Blackwell Publishing

Drainage rafter bracket (used where there is no fascia board) side fixing rafters top fixing fascia bracket running outlet down pipe fascia board 1 m max amount of fall string line plan area 4. 0 m 6. 0 m L half round B 5. Gutter designs 0 m ‘O Gee’ square line effective area for calculation purposes: 6 m x 4 m x 1. 4 = 33. 6 m 2 45° From Plumbing (3 rd edition), R. D. Treloar, page 343 Eaves guttering Copyright Blackwell Publishing Ltd, all rights reserved: www. blackwellpublishing. com eaves

Drainage Selection of rain water and gutter fittings From Plumbing (3 rd edition), R.

Drainage rainwater hopper head gutter offset formed 2 m max pipe bracket roof outlet adaptor to drain pipe vent roof decking plumb bob shoe combined roof outlet and vent pipe Rainwater connections to discharge stacks Rainwater pipes From Plumbing (3 rd edition), R. D. Treloar, page 345 Copyright Blackwell Publishing Ltd, all rights reserved: www. blackwellpublishing. com

Drainage surface water drain irrigation trench concrete slab support rodding access inlet hardcore or clinker filled soakaway (limited storage capacity) Soakaways dry wall soakaway baffle (good storage capacity) GRP septic tank 100 mm dia vent house drain fresh air inlet inspection covers partition baffle 3 m minimum rodding access inspection cover dip pipe inlet crust formation dip pipe outlet Traditional brick built septic tank Soakaways, cesspools and septic tanks From Plumbing (3 rd edition), R. D. Treloar, page 347 Copyright Blackwell Publishing Ltd, all rights reserved: www. blackwellpublishing. com irrigation trench the anaerobic bacterial action only occurs when a crust has formed on the surface hence the need for dipped inlet and outlet pipes sludge GRP cesspool outlet

Drainage jointing material etc. , causing a blockage unaligned pipe Obstruction test ball (13 mm less in dia than pipe) reflected light should reveal a perfect circle mirror torch Reflection test 15 mm or 1/2’’ BSP mild steel pipe 4. 0 m max head drain plug or bag 1. 5 m min head Water test 100 mm hand pump valve closed during test drain plug Air test From Plumbing (3 rd edition), R. D. Treloar, page 349 Copyright Blackwell Publishing Ltd, all rights reserved: www. blackwellpublishing. com drain plug Soundness testing of drainage systems