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Bath/Shower mixer problem
I have a bath / shower mixer tap - the type with a pull up diverter between the taps, the diverter stays in whichever position you select (i.e. does not need water pressure to keep it up).
The system is 'traditional' gravity fed - the cold water is supplied to shower only from the loft tank. All other cold water outlets (taps / toilets) are mains. Recently the mix of water in the ensuite has become unbearably hot - there has been no change to the hot water temperature setting. I have removed the tap glands and diverter there does not appear to be any blockage the seals look in good condition - I even replaced the glands, I have had descaler in the tap (although we are soft water area and scale is not a problem elsewhere!) The shut off valves for the feeds are both fully open. The house bathroom has a similar tap - which has a separate cold water feed from the tank in the loft - but this is working fine -so cold water tank is fine (physical check confirms level in tank ok) . It seems to be a pressure problem - as the temperature reduces as I lower the shower head - but I don't understand why this may may be - it has worked fine for 2 years since I replaced the tap unit because of a failed diverter!! I have run the water through the unit with the glands removed in case there was a blockage. Any thoughts / ideas what I can check / do next? Thanks |
#2
Posted to uk.d-i-y
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Bath/Shower mixer problem
On Jan 23, 9:48*am, Goudurix wrote:
I have a bath / shower mixer tap - the type with a pull up diverter between the taps, the diverter stays in whichever position you select (i.e. does not need water pressure to keep it up). The system is 'traditional' gravity fed - the cold water is supplied to shower only from the loft tank. All other cold water outlets (taps / toilets) are mains. Recently the mix of water in the ensuite has become unbearably hot - there has been no change to the hot water temperature setting. I have removed the tap glands and diverter there does not appear to be any blockage the seals look in good condition - I even replaced the glands, I have had descaler in the tap (although we are soft water area and scale is not a problem elsewhere!) The shut off valves for the feeds are both fully open. The house bathroom has a similar tap - which has a separate cold water feed from the tank in the loft - but this is working fine -so cold water tank is fine (physical check confirms level in tank ok) . It seems to be a pressure problem - as the temperature reduces as I lower the shower head - but I don't understand why this may may be - it has worked fine for 2 years since I replaced the tap unit because of a failed diverter!! I have run the water through the unit with the glands removed in case there was a blockage. Any thoughts / ideas what I can check / do next? Thanks -- Goudurix So what happens when you turn the hot tap on the mixer completely off? No water at all? |
#3
Posted to uk.d-i-y
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Bath/Shower mixer problem
Goudurix wrote ...
I have a bath / shower mixer tap - the type with a pull up diverter between the taps, the diverter stays in whichever position you select (i.e. does not need water pressure to keep it up). The system is 'traditional' gravity fed - the cold water is supplied to shower only from the loft tank. All other cold water outlets (taps / toilets) are mains. Recently the mix of water in the ensuite has become unbearably hot - there has been no change to the hot water temperature setting. I have removed the tap glands and diverter there does not appear to be any blockage the seals look in good condition - I even replaced the glands, I have had descaler in the tap (although we are soft water area and scale is not a problem elsewhere!) The shut off valves for the feeds are both fully open. The house bathroom has a similar tap - which has a separate cold water feed from the tank in the loft - but this is working fine -so cold water tank is fine (physical check confirms level in tank ok) . It seems to be a pressure problem - as the temperature reduces as I lower the shower head - but I don't understand why this may may be - it has worked fine for 2 years since I replaced the tap unit because of a failed diverter!! I have run the water through the unit with the glands removed in case there was a blockage. Any thoughts / ideas what I can check / do next? Cold tank not filling up as fast as it empties. |
#4
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Tank appears to fill ok - house shower works fine
When hot tap is off the cold water flows fine. Without some sort of meter / guage it is difficult to check pressure in the two feeds. But if I remove shower head and point the hose upwards, both hot and cold jets on their own appear to rise to the same height (but obviously this is just a visual estimate!) Feed is 22mm to both hot and cold Nothing wrong with the design - it has been fine up to now Only thing I can think of is debris from the tank settled in the pipe and reducing flow in the cold feed - any ideas how I could 'blow' this through? |
#5
Posted to uk.d-i-y
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Bath/Shower mixer problem
On Jan 24, 6:17*pm, Goudurix wrote:
'Eric[_18_ Wrote: ;3001730'] Cold tank not filling up as fast as it empties. Tank appears to fill ok - house shower works fine When hot tap is off the cold water flows fine. Without some sort of meter / guage it is difficult to check pressure in the two feeds. But if I remove shower head and point the hose upwards, both hot and cold jets on their own appear to rise to the same height (but obviously this is just a visual estimate!) Feed is 22mm to both hot and cold Nothing wrong with the design - it has been fine up to now Only thing I can think of is debris from the tank settled in the pipe and reducing flow in the cold feed - any ideas how I could 'blow' this through? -- Goudurix[/i][/color] Use a hosepipe connected to a mains pressure tap. Hold it against the bath taps, wrap a bit of rag round and force mains water in the "wrong" way. You will need assistance. Open low pressure taps first and close last or you will get wet. I wonder if there is a washer problem? Airlock? |
#6
Posted to uk.d-i-y
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Bath/Shower mixer problem
In message
, harry writes On Jan 24, 6:17*pm, Goudurix wrote: 'Eric[_18_ Wrote: ;3001730'] Cold tank not filling up as fast as it empties. Tank appears to fill ok - house shower works fine When hot tap is off the cold water flows fine. Without some sort of meter / guage it is difficult to check pressure in the two feeds. But if I remove shower head and point the hose upwards, both hot and cold jets on their own appear to rise to the same height (but obviously this is just a visual estimate!) Feed is 22mm to both hot and cold Nothing wrong with the design - it has been fine up to now Only thing I can think of is debris from the tank settled in the pipe and reducing flow in the cold feed - any ideas how I could 'blow' this through? -- Goudurix Use a hosepipe connected to a mains pressure tap. Hold it against the bath taps, wrap a bit of rag round and force mains water in the "wrong" way. You will need assistance. Open low pressure taps first and close last or you will get wet. I wonder if there is a washer problem? Airlock?[/i][/color] Not been following this thread but found Harry's suggestion to work in a holiday bungalow where the over winter drain down invariably caused air locking problems on re-use. -- Tim Lamb |
#8
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Bath/Shower mixer problem
In message , Goudurix
writes 'Eric[_18_ Wrote: ;3001730'] Cold tank not filling up as fast as it empties. Tank appears to fill ok - house shower works fine When hot tap is off the cold water flows fine. Without some sort of meter / guage it is difficult to check pressure in the two feeds. But if I remove shower head and point the hose upwards, both hot and cold jets on their own appear to rise to the same height (but obviously this is just a visual estimate!) Feed is 22mm to both hot and cold Nothing wrong with the design - it has been fine up to now Only thing I can think of is debris from the tank settled in the pipe and reducing flow in the cold feed - any ideas how I could 'blow' this through?[/i][/color] -- Goudurix Back flush with mains pressure using hose from another tap. -- bert |
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