Water Supply Industry Interpretations and Advice
Index
| Area of Interest | Reference | Topic | Title |
|
Backflow prevention |
B01 |
Risk assessment |
Laboratories – risk of contamination by backflow |
|
Backflow prevention |
B02 |
RPZ Valves |
RPZ valves - record keeping |
|
Backflow prevention |
B03 |
Emergency supplies |
Renal Dialysis units – emergency water supplies to hospitals |
|
Backflow prevention |
B04 |
Fluid category |
Steam ovens – catering equipment |
|
Backflow prevention |
B05 |
Fluid category |
Dry cleaning machines |
|
Backflow prevention |
B06 |
Fluid category |
Backflow risk in dog and cat kennels |
|
Backflow prevention |
B07 |
Fluid category |
Pressure washers |
|
Backflow prevention |
B08 |
Fluid category |
Non-domestic hose union taps and use of Fluid Category 5 categorisation |
|
Backflow prevention |
B09 |
Filling loops |
Rapid filling of heating and cooling systems in non-domestic premises |
|
Backflow prevention |
B10 |
Fluid category |
Washbasins in hairdressing saloons. |
|
Backflow prevention |
B11 |
Temporary supplies |
Dosing equipment - temporary connection under the provision of Regulation 2(2). |
|
Backflow prevention |
B12 |
Fluid category |
Flushing water systems prior to commissioning |
|
Backflow prevention |
B13 |
Fluid category |
Swimming pools in domestic and non-domestic premises and hose union taps |
|
Backflow prevention |
B14 |
Fluid category |
Baths – residential care accommodation |
|
Backflow prevention |
B15 |
Fluid category |
Fence-cleaning chemical spray equipment directly connected to mains |
|
Backflow prevention |
B16 |
Maintaining supplies |
Cross connections - permissible arrangements |
|
Backflow prevention |
B17 |
Fluid category |
Dishwashing machines in small nursing homes |
|
Backflow prevention |
B18 |
Fire sprinklers |
Fire sprinkler systems – backflow protection of domestic water supplies |
|
Backflow prevention |
B19 |
Maintaining an air gap |
Pre-rinse spray units for catering use |
|
Backflow prevention |
B20 |
Flexible hoses |
Restraining rings for backflow protection of flexible shower hoses |
|
Backflow prevention |
B21 |
Flexible hoses |
Flexible hoses used in catering premises for vegetable preparation |
|
Backflow prevention |
B22 |
Water heaters |
Filling and topping up heating system primary circuits. |
|
Backflow prevention |
B23 |
Backflow protection |
Temporary water supplies to agricultural shows and festivals etc. |
|
Backflow prevention |
B24 |
Fluid category |
Glass washers |
|
Backflow prevention |
B25 |
Fluid category |
Cement batching plant |
|
Backflow prevention |
B26 |
Secondary backflow protection |
Secondary backflow protection for Caravan and residential park homes |
|
Backflow prevention |
B27 |
Backflow protection |
Backflow protection for water supplies to construction sites |
|
Backflow prevention |
B28 |
Fluid category |
Backflow risk assessment for allotment hose union taps: |
|
Backflow prevention |
B29 |
Fluid category |
Backflow protection for hydrants or washouts |
|
Backflow prevention |
B30 |
Fluid category |
Hose union taps used in bin stores |
|
Backflow prevention |
B31 |
Fluid category |
Compost irrigation in wormeries |
|
Backflow prevention |
B32 |
Whole site and zone backflow prevention |
Verifiable check valves installed below ground |
|
Backflow prevention |
B33 |
Fluid category |
Baptism pools |
|
Backflow prevention |
B34 |
Fluid category |
Taps incorporating a pull out spray |
|
Backflow prevention |
B35 |
Fluid category |
Acceptability of two single check valves in place of a double check valve |
|
Backflow prevention |
B37 |
Fluid category |
Baths for assisted bathing of the disabled |
|
Backflow prevention |
B38 |
Fluid category |
Backflow protection requirements for reverse osmosis units |
|
Backflow prevention |
B39 |
Type DC arrangements |
Alignment of the installation requirements for Type DC arrangements |
|
Backflow prevention |
B40 |
Fluid category |
Humidifiers |
|
Backflow prevention |
B41 |
Type DC and air break to drain |
Use of Type DC arrangements and air break to drains in laboratories |
|
Backflow prevention |
B42 |
Back flow protection |
Backflow protection for storage cisterns water storing wholesome water |
|
Backflow prevention |
B43 |
Fluid category |
Back up supplies for grey water systems |
|
Backflow prevention |
B44 |
Fluid category |
Spa, floatation and whirlpool baths |
|
Backflow prevention |
B45 |
Fluid category |
Hose union taps used in connection with spa, floatation and whirlpool baths |
|
Backflow prevention |
B46 |
Fluid category |
Fire station fire hydrants |
|
Backflow prevention |
B47 |
Fluid category |
Retractable hoses on catering steaming ovens |
|
Backflow prevention |
B48 |
Fluid category |
Domestic appliances which comply with BS EN 61770 |
|
Backflow prevention |
B49 |
Fluid category |
Storage cisterns supplying both laboratory taps and wash hand basins |
|
Backflow prevention |
B50 |
Zone protection |
Zone protection in hotels and student accommodation |
|
Backflow prevention |
B51 |
Type DB arrangements |
Alignment of the installation requirements for Type DB arrangements |
|
Backflow prevention |
B53 |
Backflow risk of shower hoses |
Demarcation between a fluid category 3 and fluid category 5 zone of risk in a bathroom |
|
Backflow prevention |
B54 |
Temporary filling loops |
Disconnection of temporary filling loops |
|
Disputes |
D01 |
Resolving disputes |
Advice on disputes and arbitration |
|
Enforcement |
E01 |
Scope of the Regulations/Byelaws |
Systems conveying both mains water and water from an alternative source |
|
Enforcement |
E02 |
Scope of the Regulations/Byelaws |
Contractor’s liability |
|
Installation |
I01 |
Stopcocks |
Need for boundary stopcocks |
|
Installation |
I02 |
Preventing cross connection |
Inappropriate use of blue coloured pipe |
|
Installation |
I03 |
Pressure testing |
Plastics pipes - test requirements. |
|
Installation |
I04 |
Stop valves |
Stop valves – for two or more premises with common supply or distributing pipes |
|
Installation |
I05 |
Pipes |
Location of pipes under solid floors |
|
Installation |
I06 |
Contamination |
Ban on lead-based solder – declaration from developer/installer |
|
Installation |
I07 |
Water heaters - expansion water |
Isolation valves in expansion vessel pipework. |
|
Installation |
I08 |
Pipes |
Colour coding of supply pipes |
|
Installation |
I09 |
Water heaters - expansion water |
Mains fed water storage heaters of 15 litres or less. |
|
Installation |
I10 |
Fittings |
Continued use of fittings lawfully installed under the former Water Supply Byelaws. |
|
Installation |
I11 |
Accessibility of pipework |
Accessibility of supply pipes passing through premises in multi-occupancy. |
|
Installation |
I12 |
Stop valves |
Provision and location of common or separate supply stop valves in buildings |
|
Installation |
I13 |
Servicing valves |
Hose union taps considered as service valves |
|
Installation |
I14 |
Discharge pipes |
Discharges from condensing boilers |
|
Installation |
I15 |
Insulation |
Frost protection for the supply pipe systems to, and on, allotments |
|
Installation |
I16 |
Overflow arrangements |
Requirements for an overflow for a cistern supplied via a float valve |
|
Installation |
I18 |
Surge arrestor |
Deadlegs as surge arrestors |
|
Installation |
I19 |
Pipework |
Proximity of plastic supply pipes, sewers and drains |
|
Installation |
I20 |
Expansion vessels |
Installation of expansion vessels |
|
Installation |
I21 |
Dead leg |
Dead legs |
|
Installation |
I22 |
Supply pressure |
Maximum and minimum supply pressure |
|
Installation |
I23 |
Accessibility |
Accessibility of operational fittings |
|
Installation |
I24 |
DZR |
Clarification of DZR requirement for closed circuits |
|
Installation |
I25 |
Lead pipe |
Repairing lead pipe |
|
Installation |
I26 |
Pipework |
Supplies in cemeteries & graveyards |
|
Installation |
I27 |
Pipes |
Acceptability of pipe complying with WIS 4-32-19 |
|
Installation |
I28 |
Utility pipes |
Relative positioning of utility service |
|
Installation |
I29 |
Supply pipe |
Re-using an existing supply pipe |
|
Installation |
I31 |
Irrigation systems |
Guidance for installers of irrigation systems |
|
Installation |
I32 |
Safety valve discharge |
Safety valves discharge arrangements for multiple systems |
|
Installation |
I33 |
Copper pipe |
Installation of copper pipe below ground |
|
Installation |
I34 |
Copper |
Equivalent of Table X, Table Y and Table W copper tube |
|
Installation |
I35 |
Pressure testing |
BS EN 806: pressure testing requirements |
|
Installation |
I36 |
Towel radiators |
Acceptability of towel radiators connected to the domestic hot water system |
|
Installation |
I37 |
Stop valves |
Screwdriver operated spherical valves |
|
Installation / Water Quality |
IWQ01 |
Disinfection of pipework |
Time elapsed before re-disinfection |
|
Non-compliance |
NC01 |
Crown immunity |
Application of the regulations to premises previously covered by Crown immunity |
|
Non-compliance |
NC02 |
Timescale for improvements |
Proportionality and timescales in requiring compliance |
|
Notification |
N01 |
Fire sprinklers |
Fire sprinkler systems - adequate water supply |
|
Notification |
N02 |
Details of notifiable work |
Notification of alterations – exemption for minor work |
|
Notification |
N03 |
Approved Contractors |
Approved Contractors exemption from Notification and Compliance Certificates. |
|
Relaxations |
R01 |
Consistency |
Seeking national Water Supply Industry support |
|
Requirements for Water Fittings |
RWF1 |
Interruption to water supply |
Electric water heaters - continuity of supply |
|
Use of water |
UW01 |
Fire sprinklers |
Provision of water for fire sprinkler systems in domestic premises |
|
Water Quality |
WQ01 |
Preventing contamination |
Standpipes |
|
Water Quality |
WQ02 |
Preventing contamination |
Taste of TCP from flexible hoses |
|
Water Quality |
WQ03 |
Maintaining wholesomeness |
Chemical dosing equipment for maintaining water quality |
|
Water Quality |
WQ04 |
Pressure testing and disinfection |
Changing premises from private water supplies to public supplies |
|
Water Quality |
WQ05 |
Liability |
Dosing equipment - responsibility |
|
Water Quality |
WQ06 |
Contamination |
Preventing stagnation in a fire sprinkler system |
|
Water Quality |
WQ07 |
Responsibility for Water Quality |
Water supplies to dental chairs |
|
Water Quality |
WQ08 |
Maintaining wholesomeness |
Use of petroleum tapes for wrapping pipes and fittings |
|
Water Quality |
WQ09 |
Responsibility for Water Quality |
Children’s play equipment that uses water |
|
Water Quality |
WQ10 |
Disinfection |
Disinfection requirements for caravans |
|
Water Quality |
WQ11 |
Fluid category |
Safety showers and eye wash baths |
|
WCs |
WC01 |
Warning pipes |
Internal warning pipes (overflows) |
|
WCs |
WC02 |
Warning pipe |
WC cisterns - inappropriate use |
|
WCs |
WC03 |
Flushing performance |
WC pans - on site test of flushing effectiveness |