Hi all I have a hot water cylinder in loft conventional boiler I get really low pressure flow from the bathroom taps, looking in the loft where the pipes for the taps runs i notice one has a larger diameter 22m maybe then the other which maybe 15mm. Is this correct for hot and cold or should they both be 22mm wide any advice would be great thank you
Low pressure flow from hot water taps in bathroom
- Thread starter Mojo12345
- Start date
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Very conventional 22mm hot and 15mm cold on vented cylinder setups.
Those pipes should really be insulated.
With a vented cylinder the hot water pressure is governed by the difference in height between the water level in the header tank and the bathroom tap. So if the tank water level is 2 metres above the bathtap you'll get at best 0.2 bar pressure. Those pipe runs look quite long, that'll reduce the apparent pressure as well.
Those pipes should really be insulated.
With a vented cylinder the hot water pressure is governed by the difference in height between the water level in the header tank and the bathroom tap. So if the tank water level is 2 metres above the bathtap you'll get at best 0.2 bar pressure. Those pipe runs look quite long, that'll reduce the apparent pressure as well.
Yes but you'll probably have to change some pipework on the cylinder as well.
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Also depends on the tap and the connections to it. Both the taps and the feeds need to be designed for low pressure
The normal approach to gravity fed hot and cold would be 22mm all the way to the taps for both. That maximises available flow. Never use mixer/monobloc 1/4 turn taps as they are inherently restrictive internally and the flexi hoses they use kill flow.
Pumping would be the normal solution but as suggested the system needs to be set up to run that properly.
The normal approach to gravity fed hot and cold would be 22mm all the way to the taps for both. That maximises available flow. Never use mixer/monobloc 1/4 turn taps as they are inherently restrictive internally and the flexi hoses they use kill flow.
Pumping would be the normal solution but as suggested the system needs to be set up to run that properly.
That read as if someone has made the mistake of fitting high pressure taps, on your system, which needs low pressure taps.
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