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gordont
Joined: 17 Dec 2007
Posts: 3
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 Posted: Tue Jan 01, 2008 10:25 pm Post subject: Bathroom basin taps |
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| I have recently moved and find I have a monobloc tap on the bathroom basin which delivers hot water very slowly. Cold water delivery is fine. The tap is modern and has what looks like an inverted saucepan on the top, the handle of which you lift and turn to control the water flow. Is it possible to get inside the tap to see if the washer, presumably ceramic, is causing the hot water flow problem? If it is possible how do I do it?. B&Qs plumber didn't know. |
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mark6266
Joined: 08 Feb 2003
Posts: 206
Location: sussex
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| Posted: Wed Jan 16, 2008 12:07 am Post subject: |
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before you strip the tap can you tell me if you have a orderary open vented system if so have i look under the sink for the issolation valves are they the ballofix type ( the type you use a slotted screw driver to issolate) if you find one of thease under you sink feeding the hot supply to your tap replace it with a full bore lever valve that may inprove things but if the tap is designed for high pressure systems (many are) you will never get a good flow rate out of it on a orderary open vented system.
regards mark (alinplumbing@fsmail.net) |
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gordont
Joined: 17 Dec 2007
Posts: 3
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| Posted: Wed Jan 16, 2008 6:22 pm Post subject: |
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mark6266
Thanks for your interest. The system is open vented and there are in-line ball isolating valves as you describe for both cold and hot supplies. I have turned the hot supply valve on and off in case something was lodged in it but it made no difference. I have also blocked the tap spout with my hand and turned the tap fully on in the mid position hoping to clear any air lock. This also made no difference to the H.W. flow. I note your idea of changing the isolating valve but why should the cold supply from the tap be perfectly satisfactory but not the hot as they are both under the same pressure? |
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mark6266
Joined: 08 Feb 2003
Posts: 206
Location: sussex
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| Posted: Fri Jan 18, 2008 8:46 pm Post subject: |
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no they are not the same pressure the old supply should be direct of the cold mains supply into the house to corform with the building regs the pressure can be between 1.5bar and 6 bar on the cold mains depending on were you live. and the hot supply the the head of pressure between the bottom of your cold water storage tank and the top of your hot water cylinder which normaly will be much less than 1 bar .
regards mark (allinplumbing@fsmail.net)
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regards mark. (allinplumbing@fsmail.net) |
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