OT thermostatic shower rail problems

[nordicgod]

Hi all, just wondering if any plumbers on the site could help with a problem .

For over a year the girlfriends shower in eastbourne has been luke warm with the temp setting up as far as it would go, on feeling the left side of shower rail it was really hot , so reading up I put it down to the thermostatic cartridge. We brought a new thermostatic shower rail and I installed that in July, for 6 weeks the shower has been lovely and hot even on the 38 degree setting but then it was steadily getting colder and had to gradually up the temperature dial to full again , I reread instructions and they said when installed to isolate hot then cold feed about 6 times to commission the cartridge , there were no isolation valves on feed to shower, so I installed them two weeks ago and followed instructions the shower then was fine again till yesterday when it's only like warm again, grrrr.

Will I have to isolate hot and cold feeds again ? And keeping doing it? Or is this to do with the combination boiler? Most frustrating should I just buy a wall mounted standard shower/mixer tap instead of a thermostatic one . Any advice please

 

[Hampster Gull]

Change your girlfriend

 

[nordicgod]

Change your girlfriend

haha replace with a new model?

 

[Hampster Gull]

haha replace with a new model?

I am sure she will understand

 

[METALMICKY]

Wow two absolutely hilarious responses. Witty or clever maybe acceptable, but in this case neither so why bother if you can't help the bloke?

 

[Hampster Gull]

Wow two absolutely hilarious responses. Witty or clever maybe acceptable, but in this case neither so why bother if you can't help the bloke?

 

[BN9 BHA]

What make and model is the shower?
Have you had any problems with the temperature at the hot taps?

 

[METALMICKY]

Witty smiley retort too!

 

[Hampster Gull]

Witty smiley retort too!

Did your mothe not love you?

 

[METALMICKY]

Did your mothe not love you?

Yes and she taught me how to spell ' mother' correctly!

 

[nordicgod]

What make and model is the shower?
Have you had any problems with the temperature at the hot taps?

Just a generic one from Amazon , hot water taps are fine and scorching that's what is so frustrating has been fine for 6 odd weeks then it's just gone like the old one

 

[Hampster Gull]

Yes and she taught me how to spell ' mother' correctly!

Very witty reply, you must feel very proud. I will drop out of this, your just a bit too dull

 

[METALMICKY]

Very witty reply, you must feel very proud. I will drop out of this, your just a bit too dull

It wasn't witty but factual. And best to dip out before you look even more immature.

 

[BN9 BHA]

Just a generic one from Amazon , hot water taps are fine and scorching that's what is so frustrating has been fine for 6 odd weeks then it's just gone like the old one

Is it a bar mixer valve similar to this photo?

If you are thinking of getting another shower valve I would go down Screwfix and buy one, if it goes wrong you can return it.
Some showers/taps bought online are cheap rubbish, can you return the one you bought?

In your original post you mentioned commissioning the shower cartridge, I have not heard of this before.

Some shower valves get scaled up very quickly, you could try removing the cartridge and placing it in kettle de scaler.
Kilrock from hardware shops is the best type of descaler.

 

[Vegas Seagull]

It wasn't witty but factual. And best to dip out before you look even more immature.

You've added no help either....


Anyway someone that is a self styled Nordic God shouldn't need anyone's help

 

[nordicgod]

View attachment 68984

Is it a bar mixer valve similar to this photo?

If you are thinking of getting another shower valve I would go down Screwfix and buy one, if it goes wrong you can return it.
Some showers/taps bought online are cheap rubbish, can you return the one you bought?

In your original post you mentioned commissioning the shower cartridge, I have not heard of this before.

Some shower valves get scaled up very quickly, you could try removing the cartridge and placing it in kettle de scaler.
Kilrock from hardware shops is the best type of descaler.

Yes similar to that one, will have a word with the other half and maybe return it to Amazon and yeas get another from screw fix , might try and de scale cartridge first I suppose

 

[Rowdey]

Your cold mains pressure might be too much for the hot - Most branded showers (Grohe/Crosswater/HG etc) can cope with an imbalance up to 5:1, but i've had a few (Bristan/Gummers) where we've had to slow down the cold to match the hot.

Can you fit a PEQ https://www.bes.co.uk/product/110~PL~1965~-Water-Pressure-Equalising-Valve.html on the supplies ? (guess you can if you fitted iso valves..!)

 

[Herr Tubthumper]

Jesus. Does a day go by without there being an issue with the rail in the UK?

Wouldn't happen in Germany.

 

[nordicgod]

Your cold mains pressure might be too much for the hot - Most branded showers (Grohe/Crosswater/HG etc) can cope with an imbalance up to 5:1, but i've had a few (Bristan/Gummers) where we've had to slow down the cold to match the hot.

Can you fit a PEQ https://www.bes.co.uk/product/110~PL~1965~-Water-Pressure-Equalising-Valve.html on the supplies ? (guess you can if you fitted iso valves..!)

Suppose it could be the pressure but for that price I may aswell just get a standard wall mounted shower/tap mixer without the bloody thermalstatic cartridge in

 

[nordicgod]

Looks like returning the one we have then to Amazon and popping to screw fix eastbourne to see what I can get, thanks for the replies , thought it might have been me but must be the rail/bar