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I have a hudson reed Twin Concealed Thermostatic Shower Valve. It was working fine for a couple of years. My brother used the shower and adjusted the water temperature valve but since then the water has come out scolding hot. I moved the water temperature valve around to cold but could not get the water temperature to change. I then took valve off and turned it to cold manually, but the water temperature still does not change. Is the shower bust or is there anything I can do to fix it?

Posted by mark_pitts_t on


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Jeff Harris

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Sounds to me the diffusor is stuck or broken in the position to allow only hot water through it.Looks to me tou have a mixer valve on it. Might have to replace it.

Posted on May 31, 2011


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I have a Mira sport shower it works but dose not get hot is it the thermastate that's gone I have had it for about 12 years

The thermostatic cartridge is the part of the shower valve which control's the temperature of the water, therefore if there is a problem with the water temperature, the absolute probability points towards the thermostatic cartridge being at fault.

I would suggest you extract the thermostatic cartridge, remove any bits blocking water flow into the cartridge and then soak it in limescale remover. Put silicone grease on the O'rings. Install it again. If that doesn't work, the element within the cartridge could be faulty, so you could try replacing the element. If that doesn't work you will have to either replace the entire shower valve or replace the cartridge.

All of what I've said is based on the assumption that you are receiving hot water to your shower valve.

I've been working with thermostatic cartridge for many years and can tell you with confidence the above information likely applies to yourself. Shower Thermostatic Cartridge Spares

Nov 22, 2015 | Home

2 Answers

Hi Have a hudson reed kia twin valve shower - fab! But recently taking forever for the hot water to come through. Don't think it's the boier as the hot water comes through quickly everywhere else...

with out a water circulator every thing takes time ----------- sounds like the thermostats going bad you do have a 10 year warranty on this faucet type in your browser hudson reed kia faucet

Jan 18, 2011 | Home

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How do I remove grohe shower trim?

norm cover levers off go round cover at four points

Oct 14, 2009 | Grohe Integrated 1/2'' Shower Thermostatic...

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My thermostatic concealed shower valve only gives either boiling hot water or cold water, there is no inbetween temperature? the cold is fed from mains and the hot from a combi boiler. the plumber has said...


If the hot and cold are fitted the wrong way round then the thermostat on the shower unit cannot operate properly!

Most thermostatic mixer showers have a 'bi-metallic' thermostat, if you supply the hot to the cold and vice versa IT WILL NOT WORK.

It is like wearing the left shoe on the right foot and the right on the left! It doesn't work.

Re-install the hot and cold to the correct supply, and this will sort it.

I hope this helps.

Jul 07, 2009 | Grohe Integrated 1/2'' Shower Thermostatic...

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Hudson Thermostatic Problem

try this.
if you have anti scald device installed in the valve, take it out. the anti-scald device is to keep the hot water from pouring out in case the cold water pipe is not functioning. In general sense, it is a good idea, however, it also mixes too much of cold water, therefore you don't get eough hot water.

Jan 10, 2009 | Home

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