DIY Doctor

What is wrong with my cold water feed temperature and supply?

Postby TF92 » Sat Mar 06, 2021 5:24 pm

I have been having problems with my upstairs and only bathroom in my two bed new build (late 90s). It has the old fashioned heating/water system in with immersion heater for hot water in airing cupboard and cold tank in loft. I don’t know much about these things sorry.

Ever since we got new bathroom fitted there’s been problems. We wanted a power shower but the cowboys who came said the system didn’t need it (big mistake) had to have a salamander pump fitted in the end (more on this later). They also flooded my old boiler so now I have a new Valiant boiler which is actually a bigger capacity than is needed but no issues with boiler & heating at all.

Basically at first could not get cold water feed to come out of either cold tap or shower on low temp. It spurts and splutters a lot. Then goes to a bit of a trickle. hot tap is fine - no issues there.

Now the not only is the cold feed weak and spluttering it GETS REALLY HOT. So hot that you can’t even touch the tap. The shower stops working the minute you decrease the temperature on it because it’s literally at burning temperature. I cannot shower at all now due to this and limited to baths.

I have noticed the salamander pump also gets incredibly hot and takes ages to stop after useage. It’s got the point I’ve had to switch it off a couple of times for fear of something happening as the airing cupboard is in my bedroom. I wonder whether this is heating up the cold in its self or compounding the main issue.

I have also noticed once or twice the shower part of the system making a bubbling like boiling water noise occasionally too because the whole thing (it’s like a bar for the hot & cold feeds on side you turn for the two different shower heads and the other side is turned for temperature) because getting so hot. Very rare occurrence but still weird.

I am at my wits end with it, a different plumber looked at it twice then refused to come back and help fix it after the valves he fitted still didn’t solve the issue (although improved the pressure a bit).

My bathroom is now largely useless & now takes a considerable amount of time to actually maintain decent hygiene (I’ve noticed to not use the water for bathing anywhere near when it’s been heated). I’ve tried to lower the water temp on the tank but can’t anymore as it’s literally worn away (the little adjustment arrow thingy) it’s so old.

There is no issues with the bathroom sink taps or kitchen sink downstairs. Both work normally so I know it’s specifically to do with the feeds to the bathroom.

Please help. As someone with chronic health issues I cannot live like this properly at all.
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Simply Build It

Postby stoneyboy » Sun Mar 07, 2021 10:02 pm

Hi tf92
The multiple issues you are having are too complex for members of this forum to suggest a comprehensive solution. You really need professional help from a tradesperson. Suggest you start by replacing the thermostat on you hot water cylinder.
Regards S
Rank: Project Manager
Posts: 4376
Joined: Wed Dec 10, 2008 6:44 pm

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