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mira excel shower

This question is regarding Mira Excel (1990-96) Cartridge - 903.33

HI , i have a mira excel shower --fitted in new house 10 or 11 years ago --all ok until recently --all pressure at taps around the house is great -- pressure in shower when cold water only is coming through is fine --but when the hot is increased pressure drops off and shower works but not very hot and power down low.

what should i do or look to replace


Asked 7 years ago by Anonymous
Hi Assuming nothing with your plumbing has changed IE. You have had a combi boiler fitted or replaced then if  you have problems with an Excel then it's best just to replace the cartridge, however it is probably worth stripping the cartridge out and checking that the inlet filters are clean, before buying a new cartridge. To replace the cartridge Pre 2003 units  Turn off hot and cold water supply   Pull front temperature knob off The rest of the knob assy. just unclips   Remove 4 screws that hold cartridge into body   Pull old cartridge forward shouldn't be too tight   Set new cartridge for High/Low pressure (instructions with cartridge)   Slip new cartridge into place remember to check that the new seals are all in place (and don't drop out as you push back)   Tighten screws be careful not to over tighten   Refit knobs.   Turn on water and test. (Occasionally you will have to reset the cartridge temperature, instructions with cartridge)   Easy peasy!!!!  Cartridge   Mira 903.33  This cartridge supersedes the previous high and low pressure versions Link to cartridge  
Answered 7 years ago by Anonymous
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