low pressure hot water from ultrasteel unvented to shower

sunil1234 · 31 Mar 2012

Hi

Something that has literally deveoped overnight. Ultrasteel unvented cylinder set up.

Direct hot feed (literally 1metre) to bar shower mixer has low pressure when turning temp to wamer settings.

Took bar mixer off and turned back on water supply - cold shoots across the cubicle but hot dribbles out of the elbow.

No leaks internally and all other taps in 3 story town house working fine hot or cold.

Hot water for shower is teed off from hot going to upstairs bathroom where hot pressure is fine, only a double check valve after the T, is this the issue?. How easy is it to replace if so?

thanks

Sunil

dcawkwell · 31 Mar 2012

Thermostatic valve in the mixer shower at fault?

sunil1234 · 31 Mar 2012

thats what i thought initially but dont think it can be mate,took the shower mixer off turned supply back on and its still dribbling out the HW....

steve32 · 31 Mar 2012

Filter in hot inlet blocked

picasso · 31 Mar 2012

As you have taken the shower off its gotta be the double check valve stuck closed, easy enough to replace just turn off the main stopcock drain down and replace.

sunil1234 · 31 Mar 2012

Thanks all, will pop out to get a new valve tomorrow. Its it just turn off water, drain cylinder by running hot taps, use spanner either side of valve and replace?

Thank you

Agile · 1 Apr 2012

The filter is usually at the union which you have dissed. They often block.

In your case the NRV is almost certainly jammed.

They can usually be unstuck! Sometimes just by poking if its inline and the second stage stuck. Other times the bits have to be taken apart.

Tony

sunil1234 · 1 Apr 2012

thanks guys, popped to toolstation this morning and got a new nrv for a few quid, fitted it myself (i am no handyman believe me!) and showering pleasure has been restored

cheers

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low pressure hot water from ultrasteel unvented to shower

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