Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

Sanitation presentation part 3


Published on

Above ground drainage to be done with

Published in: Education
  • Be the first to comment

Sanitation presentation part 3

  1. 1. PART 3 Practice plumbing exams ©
  2. 2. Sanitation Sanitary accommodation Sanitary accommodation is the term used for a room containing a water closet (WC) or urinal It may or may not contain other sanitary fittings Part G of the Building Regulations governs the requirements for sanitary accommodation Practice plumbing exams ©
  3. 3. Sanitation Sanitary accommodation Building Regs state:- Every dwelling shall be provided with 1 WC, 1 bath (or shower), 1 wash basin & 1 sink They should be suitably located (i.e. basin next to WC) For dwellings of more than 5 people – 2nd WC is required All appliances should be connected to suitable drainage system Practice plumbing exams ©
  4. 4. Sanitation Sanitary accommodation Ventilation requirements for sanitary accommodation (part F Bldg Regs):- Window or skylight opening to exceed 1/20th of floor area Or mechanical ventilation giving at least 3 air changes per hour (usually wired to light switch) Practice plumbing exams ©
  5. 5. Sanitation Sanitary accommodation Spatial requirements - Internal layout to allow for activity based on:- Size of body allowing space to move Number of persons using room Size of appliance itself Practice plumbing exams ©
  6. 6. Sanitation Sanitary appliances These may be divided into 2 groups:- Waste appliances, such as basins, sink, baths etc. where the appliance is used for washing Soil appliances, such as WC’s & urinals where the appliance is used for the removal of human excretia or ‘soil’  All these appliances require foul water drainage Practice plumbing exams ©
  7. 7. Sanitation Sanitary appliances BS 8000 is the Code of Practise that covers workmanship on building sites & part 13 covers sanitary appliances & above ground drainage When taking delivery, storing & installing sanitary appliances great care must be taken Practice plumbing exams ©
  8. 8. Sanitation Sanitary appliances Storage & protection:-  Sanitary appliances are expensive items & great care should be taken when transporting, storing & fixing  Store in clean dry conditions away from cements & lime plaster Always leave the protective covering on for as long as possible  Stand items on timber boarding not concrete  Be extremely careful when stacking items Practice plumbing exams ©
  9. 9. Sanitation Sanitary appliances Checking:-  Always check the appliance carefully BEFORE fitting for any defects or incorrect sizes/colour etc.  Check that the correct brackets/feet/supports fit correctly & that the taps/waste etc. are the correct size/type etc.  Always check with the Customer that the goods are to their satisfaction Practice plumbing exams ©
  10. 10. Sanitation Sanitary appliances Always READ THE INSTALLATION INSTRUCTIONS no matter how well you think you know them  Always use any templates included with the instructions  Use ‘soft’ washers when screwing the appliance to walls/floors & never over-tighten  Ensure the appliances are level  It may be more appropriate to tile walls before fixing basins & WC’s Practice plumbing exams ©
  11. 11. Sanitation Sanitary appliances - Washing Sinks:-  May be made from stainless steel, enamelled steel, resins, glazed fireclay or earthenware, & ceramics  Types may include crockery sinks with single/double sinks & drainers, Butler sinks (Belfast & London pattern) & cleaners sinks with grating over & bib taps Practice plumbing exams ©
  12. 12. Sanitation Sanitary appliances - Washing Crockery sinks:- Usually fitted between & in kitchen cupboards at around 900 mm high Separate or monobloc taps. If mixer taps receive ‘unbalanced pressures’ & mix in the body of the tap, single check valves should be used on both H & C. If pressures are balanced – not req’d  1 ½” waste, usually with combined waste & overflow  Waterproof seal around edge with worktop Practice plumbing exams ©
  13. 13. Sanitation Sanitary appliances - Washing Butler sinks:- • May be either London or Belfast pattern. These are ceramic sinks usually fitted at 750 mm high supported on brackets or short walls • Belfast pattern – with integral weir overflow. London pattern – without • Usually separate bib-taps over sink • 1 ½” chrome plated waste. Slotted waste for Belfast to receive overflow Practice plumbing exams ©
  14. 14. Sanitation Sanitary appliances - Washing Bucket or Cleaners sinks:- • Very similar manufacture as Butlers sinks, but set at lower level – around 500 mm high. Also supported on brackets or legs • Hinged galvanised grating over sink where buckets may be placed • Bib-taps over sink on wallplates Practice plumbing exams ©
  15. 15. Sanitation Sanitary appliances - Washing Washbasins:-  May be made from vitreous china, stainless steel, fibreglass or resin  2 types – those designed to fix against a wall with brackets or pedestal support, & countertop basins formed with a flange to fit vanity unit or countertop  Tile wall before fitting  Screwing fitting to wall – use brass screws with soft washers angled to suit hole  Fix pedestal to basin before fitting  Fixing height around 800 - 900 mm Practice plumbing exams ©
  16. 16. Sanitation Sanitary appliances - Washing Washbasins:- • 2 separate taps or monobloc taps with similar backflow criteria as for sink taps • 1 ¼” waste which may need to be slotted for integral waste • Some wastes incorporate ‘pop up’ waste type • Waterproof seal around edge with worktop or tiled edge Practice plumbing exams ©
  17. 17. Sanitation Sanitary appliances - Washing Baths:- • May be made from enamelled cast iron, enamelled steel, or acrylic plastics Practice plumbing exams ©
  18. 18. Sanitation Sanitary appliances - Washing Baths:- • Slipper baths (1.7 x 0.7 m’s) or tubs (0.7 x 1.1 m’s) • Corner baths save space, but more expensive • Sitz baths are short deep baths which incorporate a seat – used mainly by the elderly • Supported on feet or cradles & fixed to adjoining wall • To fit the legs/feet turn upside down on soft flat surface • Take care not to over-tighten plastic nuts Practice plumbing exams ©
  19. 19. Sanitation Sanitary appliances - Washing Baths:- • Use the washers provided & PTFE tape on threads – DO NOT use oil based compounds or pastes • You may need to drill out tap hole(s) • Fit 1 ½” waste & combined overflow •The load from the bath feet mat need to be spread on wooden bearers • Position the bath so that the side & end panel(s) will fit under & by raising/lowering feet • ensure bath edge is level Practice plumbing exams ©
  20. 20. Sanitation Sanitary appliances - Washing Baths:- • Fix bath to side wall & secure to floor • Always provide a 22 mm dia. Hot water supply to baths to ensure an adequate flow of water is available •After plumbing in, fit the side & end panels to bath & timber bearers using appropriate screws (& caps) • Mirror Screws Practice plumbing exams ©
  21. 21. Sanitation Sanitary appliances - Washing Bidets:- • May be made from vitreous china or ceramic glazed fireclay • 2 types available – ‘over the rim’ with conventional taps incorporating an air gap. & ‘ascending spray’ with nozzles below the zone of backflow risk. • This fitting is classed as a washing appliance • Around 400 mm from floor to rim • 1 ¼ x 32 mm” waste sometimes with ‘pop up’ waste Practice plumbing exams ©
  22. 22. Sanitation Sanitary appliances - Washing Bidets:- • Over the rim – no special precautions required as air gap provided will prevent contamination • Ascending spray – category 5 risk, so should not be supplied with water directly from H or C supply pipe – unless:- • Practice plumbing exams ©
  23. 23. Sanitation Sanitary appliances - Washing • Ascending spray It can be supplied with H & C water incorporating air gap via cistern (& cold may also serve WC) Bidet Hot water Heater serving Bidet only Storage cistern with air gap Practice plumbing exams ©
  24. 24. Sanitation Sanitary appliances - Washing •Ascending spray  or type DC backflow prevention device (pipe interrupter with permanent atmospheric vent) fitted not less than 300 mm above zone of backflow Bidet Hot & cold water supply to mixer Backflow Prevention device 300 mm minimum Practice plumbing exams ©
  25. 25. Sanitation Sanitary appliances - Washing •Ascending spray  or where bidet is below the spill-over level of lowest sanitary fitting & below hot water storage vessel Storage cistern With air gap Bidet Bath & other fittings Bidet at Lowest level Not less Than 300 mm Practice plumbing exams ©
  26. 26. Sanitation Sanitary appliances - Washing Showers:- • May be made from resin, acrylic plastic or ceramic glazed fireclay • Sizes are usually 700 mm² or 900mm² x 100 mm deep but other sizes & shapes are available • 1 ½ or 40mm” flush top waste with no overflow • Trays must be fully supported to avoid moving & hence leaks • Bed resin & stoneware trays on sand/cement screed •Fit shower trays BEFORE tiling Practice plumbing exams ©
  27. 27. Showers:- Instantaneous Electric Showers (Mains fed) • Mains fed via service valve • Shower rose to be kept well above bath or tray (25 mm min) by restraining ring to prevent backflow contamination • Supply problems may lead to temperature variation • Thermostatic cut-out should switch off in event of very hot water delivery • Always follow Manufacturers installation instructions • Qualified Electrician to connect electrics • Always ensure electrical earth bonding between metallic pipe-work & earth Sanitation Sanitary appliances - Washing Practice plumbing exams ©
  28. 28. Sanitation Sanitary appliances - Washing Showers:- Instantaneous Electric Showers (Mains fed) • Electrical connection  Single fuse at fuse box sized correctly  Single cable again sized correctly  Double pole switch – switch located outside bathroom or pull cord switch Practice plumbing exams ©
  29. 29. Sanitation Sanitary appliances - Washing Showers:- Instantaneous Electric Showers (Mains fed) Decommission/commission  Remove fuse & label or lock off  Switch to off  Isolate water supply  Check kilowatt rating of new unit if fitting new  Flush through to remove debris without rose fitted  Ensure electric connections tight  Fit square to wall  Re-fix casing properly  Fit correct fuse  Cold flush first, then heat up Practice plumbing exams ©
  30. 30. Showers:- Mains Pressure Operated Showers (combi’s) • Hot & Cold supplies to be ‘balanced’ (equal pressures via mains supply) • Service valves on both Hot & Cold supplies • Anti-contamination devices (double check valves) • Ensure rose cannot be positioned below spill-over level of bath/tray • Supply problems may lead to temp variation • Thermostatic mixer • Commissioning/decommissioning - Isolate valves & repair/replace Sanitation Sanitary appliances - Washing Practice plumbing exams ©
  31. 31. Sanitation Sanitary appliances - Washing Showers:- Gravity fed • Tank fed Hot & Cold balanced pressures • Hot connection at tank is higher than cold • Adequate head required from rose to tank base (read instructions – min. of 1 metre – 2 metres better) • Tank capacity 115 litre minimum • Essex or Surrey flange connections to cylinder are advisable • Separate cold connection to tank • Hot & Cold service valves • Thermostatic mixer will stabilise temperature Practice plumbing exams ©
  32. 32. Sanitation Sanitary appliances - Washing Showers:- Gravity fed – using separate cold feed Hot Cold DT Not less than int. dia. of cold water distribution pipe 22 mm minimum Full bore Gate valve Service valve Thermostatic mixer Shower rose 1 m min. Practice plumbing exams ©
  33. 33. Sanitation Sanitary appliances - Washing Showers:- Gravity fed – using cold feed pipe Hot Cold 150 mm minimum DT Anywhere along This pipe run 22 mm minimum Practice plumbing exams ©
  34. 34. Showers:- Power showers • Usually tank fed Hot & Cold (115 litres min.) • Hot draw off tank connection higher than cold at tank • Minimum pressure to pump stated by Manufacturers to prevent negative suction • Separate Hot connection to cylinder – Essex flange? • Pump may be 240 volt AC or 12 volt DC via transformer • Pump may be before or after mixer valve • Thermostatic mixer • Follow Manufactures installation instructions • Qualified Electrician to connect • Commissioning/decommissioning - Isolate control valves - Isolate electrics & label or lock Sanitation Sanitary appliances - Washing Practice plumbing exams ©
  35. 35. Sanitation Sanitary appliances - Washing Showers:- Power showers D T 22 mm minimum Full bore Gate valve Service valve Shower rose 240v Pump Double Pole switch Thermostatic mixer Practice plumbing exams ©