I have got a problem with water flow into the downstars toilet and shower.
The stopcock is fully open and I get about 10 litres/min in from the other
The toilet and shower get a lower water flow down to about 2.8 litres/min -
naturally this plays havoc with the electric shower
The kitchen (next door) acheives 10 litres/min. Is it acceptable to plumb in
a pipe from the kitchen over to the downstairs toilet/shower feed? and keep
the connection to the exisiting feed.
This should then allow the downstair toilet/sink/shower to get water at an
acceptable rate from the kitchen & the orig feed pipe - i.e this will have
two routes to the incomming supply pipe? - naturally the easiest route will
be taken by the water automatically.
Is this OK?
10 lpm is very low. It sounds like you may have low pressure. It is possible
that the toilet valve has a flow restrictor. The shower will certainly
restrict flow compared to a kitchen tap. You may find the problem is low
pressure, rather than dodgy pipework. You may need to install tanks, or
upgrade your mains to improve things.
I know - but it is better than the 2.8lts/min I am getting in the downstair
sink (in the toilet which feeds the shower)
Pressure seems OK - according to the Combi boiler gauge connected to the
kitchen tap which can go up to over 3bar (before releasing the excess
certainly restrict flow compared to a kitchen tap.
I havent even checked the toilet - The sink tap only gives out 2.8ltrs (the
hot running of the combi is giving out about 8 lpm in the same sink!)
i suspect that there is also a problem with the supply - and replacing the
stop tap will improve the flow (rather than pressure) slightly but this is
As I have got flow (to a reasonable degree) on the other taps there appears
to be a specific reason why this one tap (one 15mm pipe supplying cistern,
tap, and shower) can acheive more the 2.8lpm where the stopcock/mains can
supply at least 10lpm - hence the intention to bypass this feed - and then
deal with the stopcock is nessesary?
Agreed. Problem is that it is a rented out and there is no chance that the
landlord will replace the stopcock or supply pipe (i.e there is water)
Am willing to do a bit of plumbing (add a bypass and new stopcock) - but not
dig up the drive myself!
Sounds O.K. in principle - if it is all mains water then no problem.
Best to check that you are not getting a tank feed at this point, although
connecting an electric shower to a tank feed would be dumb by the original
I note you are in rented property and using a combi boiler so there
shouldn't be a tank - is this a seperate property or is there a possibility
that another tenant could be sharing some of your pipework?
I would suggest that you connect in the new feed, but with a full bore
Open the valve, and listen to ensure that water is not flowing (as it would
if you had connected into a tank feed - water going back up to the tank then
If it is all mains but with a dodgy feed to the bathroom, this is likely to
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