On 23 Oct, 15:17, Frank Stacey wrote:
The local community hall is infrequently used (and used mostly by women
at that). How can we minimise water usage in the men's?

I came across mention of a system which only fills the urinals' cistern
when some other water is used - possibly the wash-hand basin. *Can
anyone point me to a spec and source of this sort of control.
I am aware of the sort which uses a motion detector and only initiates
filling the cistern when someone moves in the loo area. *I am hoping the
mechanism which I am hoping someone can recognise from my brief
description might be cheaper and easier to set up.

TIA
Frank Stacey

A simple solenoid and programmable 7 day 1 channel c h timer to shut
off the water supply into the flush tank during un-occupied periods
would be my favourite. Also adjust the fill rate valve to reduce the
frequency of flushes. Do however watch out for being too parsimonious
as an underflushed urinal builds up urea crystals in the trap and
outflow pipe and is a stinking job to clear out. Push-fit joints can
be your friend in this eventuality.