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Sanitation presentation part 3

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Sanitation presentation part 3

  1. 1. PART 3 Practice plumbing exams © www.practiceplumbingexams.com
  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 © www.practiceplumbingexams.com
  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 © www.practiceplumbingexams.com
  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 © www.practiceplumbingexams.com
  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 © www.practiceplumbingexams.com
  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 © www.practiceplumbingexams.com
  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 © www.practiceplumbingexams.com
  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 © www.practiceplumbingexams.com
  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 © www.practiceplumbingexams.com
  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 © www.practiceplumbingexams.com
  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 © www.practiceplumbingexams.com
  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 © www.practiceplumbingexams.com
  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 © www.practiceplumbingexams.com
  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 © www.practiceplumbingexams.com
  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 © www.practiceplumbingexams.com
  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 © www.practiceplumbingexams.com
  17. 17. Sanitation Sanitary appliances - Washing Baths:- • May be made from enamelled cast iron, enamelled steel, or acrylic plastics Practice plumbing exams © www.practiceplumbingexams.com
  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 © www.practiceplumbingexams.com
  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 © www.practiceplumbingexams.com
  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 © www.practiceplumbingexams.com
  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 © www.practiceplumbingexams.com
  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 © www.practiceplumbingexams.com
  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 © www.practiceplumbingexams.com
  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 © www.practiceplumbingexams.com
  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 © www.practiceplumbingexams.com
  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 © www.practiceplumbingexams.com
  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 © www.practiceplumbingexams.com
  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 © www.practiceplumbingexams.com
  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 © www.practiceplumbingexams.com
  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 © www.practiceplumbingexams.com
  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 © www.practiceplumbingexams.com
  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 © www.practiceplumbingexams.com
  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 © www.practiceplumbingexams.com
  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 © www.practiceplumbingexams.com
  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 © www.practiceplumbingexams.com

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