Bath, Lavatory and Mixing Taps

Bath, lavatory and mixing taps shall generally comply with the requirements specified for bib taps in IS: 781-1977.
Combination taps, mixing valves (see IS: 1701-1960) or blenders, for mixing hot and cold water and discharging the mixture through a single outlet shall be fed with both hot water and cold water under pressure only from cistern sat the same level or from the same cistern.
the cold water should not be slide directly from a service pipe as other- &e, there is danger of scalding if the pressure in the service pipe unexpectedly fails.

Position Where Self-closing Taps are Permissible
Self-closing taps and other special fittings of makes approved by the Authority may be permitted to be used on direct pipes and distributing pipes from tanks.
Self-closing taps shall be of non-concussion type and shall comply with IS : 1711-1970

Water-Closet Flushing Cistern
All water closets and urinals shall be supplied with water from proper flushing cistern or from other equally efficient and suitable waste preventing apparatus. Flushing cisterns having 10 liters discharge capacity and discharging at an average rate of 5 l/s are considered suitable for wash-down water closets and squatting pans IS : 2556 ( Part 2 )-19818 and IS : 2556 ( Part 3 )-198111.


Water-Closet Flush Valves
No person shall fix, fit or use upon any premises any flush valves, or similar apparatus through which water supplied by @e Authority is intended to pass unless previous permission of the Authority is obtained. Such flush’ valves or flushing apparatus shall be of the self-closing type and shall be allowed on water-closets only.

Urinal Flushing Cistern
            Every urinal flushing cistern, in which water supplied by the Authority is used, shall have an efficient waste preventing apparatus so constructed as to prevent discharge of more than 5 litres of water to each, stall, basin or compartment at each flush ( see IS .: 2326-1970

Use of Automatic Flashing Cisterns
            Flushing ‘apparatus capable of discharging automatically ( -SW IS : 2326;1970* ) may be allowed to be fitted on water-closets

Use of Ball Valves
            Ball valves shall be of one of the classes, namely high pressure or low pressure and shall conform to the requirements specified inIS : 1703-1977.

Silencing Pipe of Ball Valves
A silencing pipe may be fitted to a ball valve when 4 emitted by the- Authority and in such cases antisiphonage holes shall be provided in the pipe or in the body of valves and these holes shall be above the overflow level.