Section 55
of Water Supply Regulations 1961 Reprinted 1999
Section 55
No tap or other means of drawing water, other than a tap with removable key for emptying the cistern for cleaning or repairs, shall be connected to any part of a hot water system below the top of the hot water storage cistern or pressure vessel in such a way that the level of the water in the cistern, cylinder or tank can be lowered more than one-fourth of its depth:
Provided that –
26
(a)
in the case of a hot water cistern in which water is heated only by thermostatically controlled gas or electricity and the storage cistern, cylinder or tank has a capacity of not less than two hundred gallons, this regulation shall apply with the substitution of the fraction “three-fourths” for the fraction
“one-fourth”;
(b)
in the case of a hot water cistern comprising more than one hot water pressure vessel at different levels, this regulation shall apply only to the lowest pressure vessel; and
(c)
this regulation shall not apply in the case of an open vessel in which water is directly heated.
Provisions as to inlets and outlets of baths, etc..