Mira Shower Flow/Pressure Issue

[skylined_gtr]

Hi All

Have a Mira Excel thermostatic valve installed in both bathrooms, been there for about 5 years or so. They are both fed off a Heatre Sadia MegaFlo.

For some reason one of the valves has stopped working properly.... I switch the valve on and the shower is at full flow/pressure, after about 3 seconds it lessens significantly, I'm talking about just enough to take a shower and it stays that way! Tried checking the shower hose for obstructions but even with the shower head off it's very poor flow. Also tried it on full cold or full hot but either way very poor flow. Tested the one in the other bathroom - no probs, nice and powerful.

Any ideas what could be causing this?

Thanks

Untitled

• skylined_gtr
• 30 Jun 2009
• 1

 

[namsag]

Check for mesh filtres in the inlets to valve body / scale ? strip out stat cartridge and leave soaking in white vinegas overnight

 

[skylined_gtr]

Thanks for the idea, I take it the thing has to come off the wall then? It can't be taken apart on the wall can it?

 

[skylined_gtr]

Any ideas? Appreciate the help as I really don't want to wreck the tiling if I can help it

 

[seco services]

the filters on the excel are inside, you'll need to strip it down from the white controls on the front then when you get to the cartridge their are 4 screws hold the cartridge into the chrome unit.
looks like a 96 model excel

 

[skylined_gtr]

Thanks for the advice Seco, only thing that baffles me is why the pressure gradually reduces? It's at full pressure/flow when you first switch it on but then it slowly wittles down to a very weak shower.... would scale/debris do that because I can't visualise it I could understand it might be scale/debris if it never got full pressure/flow but it does for the first few seconds.