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Q: Shower knob for water flow is just clicking and no water coming through. Have stripped back casing and a black tooth appears broken off although all teeth appear ok on cartridge. Is this a replacement cartridge? As handle is also broken and lead starting to split is it better just to replace with a new Excel?
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Submitted 8 days ago | by
plumpicker, morpetn
A:
You can replace the cartridge, knob set and hose cheaper than a new shower.
http://www.showerdoc.com/shower-spares/mira/MIRA-PARENT-106-Mira-Excel---post-1996 Answered 8 days ago | Barrie |
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Q: replaced cartridge 2 years ago, just had a new boiler fitted (more pressure), shower head started to leak. Can i get away with just replacing the 'O' seal in the cartridge? cheers.
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Submitted 17 days ago | by
m4rk, leeds
A: Thereshould be a red key that fits in to two holes at the back of thecartridge high and low stamped into the back of the cartridge using thekey you turn the back of the cartridge to high or low. High for combi boilers and pumps over 2 bar Low for gravity systems and pumps under 2 bar
But if this does not work it is a new cartridge I `m afraid as these are non serviceable. Answered 15 days ago | Barrie |
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Q: Does the 903.33 replace the 410.12 cartridge also.
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Submitted 56 days ago | by
Mickj, Leeds
A: The 903.33 fits allExcel units up to 2003 I can’t find the 410.12 on our system can you send alink or a photo or something Answered 55 days ago | The Doc |
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Q:
pls i have a mira excel, but recently it start leaking from the shower itself, can you advise if to change the cartrige or change to power shower.
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Submitted 63 days ago | by
frank, romford
A: Sounds like you just need a cartridge, the cartridges can beset for high or low pressure before fitting. Answered 62 days ago | The Doc |
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Q: Recently fitted a new Alpha InTec 30 combi boiler. When turning the temp adjustment ring up to high the water does heat up as it should, though the pressure remains high. Might there be a problem with the internal thermostat function, or does the pressure need to be adjusted? Also the valve is slightly stiff when turning on and off.
Thanks.
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Submitted 85 days ago | by
Rolls Royce, Glasgow
A: Yes the valve could be stiff due to the age and extrapressure. However if you remove the cartridge you will find that theretwo holes that the red key will fit into (see the link below) if you don’t have the red key a pair of long nosedpliers will do. On the back of the cartridge stamped in to the rear arearrows pointing to high and low push the key or pliers into the holes and turnto the high setting. http://www.showerdoc.com/shower-spares/mira/MIRA-903-33-Mira-Excel-Shower-Cartridge-903-33-Spare-Part When it is out make sure that the cartridge filters areclear. This should solve the problem however if not then it is justthe age of the cartridge and the extra pressure that is causing the problemtherefore it will have to be replaced. Answered 85 days ago | The Doc |
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Q: i have a mira advanced disabled shower,what is the right pump to use,as my pressure is not good
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Submitted 108 days ago | by
Anonymous, Unknown
A: We are having a problem at the moment with our ticketing systemit is running words together, we have people working on it!! The Mira Advance does not use a pump, the water pressure comesfrom the mains If the incoming water temperature is 10° and you want to showerat 40° then you will have a temperature rise of 30° with a 9kw shower youshould expect a flow rate of about 4lts per min Answered 107 days ago | The doc |
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Q: Just fitted a new cartridge, set the pressure to high as required, when shower is turned on the boiler stays off, if the boiler is put on constant still no hot water?
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Submitted 132 days ago | by
nigel, huddersfield
A: Check that the inside of the hose hasn’t collapsed, and thehead is clear, this could be blocking the supply Have you fitted the cartridge the correct way round?(normally hot to the left and cold to the right as you look at it ) The other thought is to remove the cartridge and flush thepipe work out see below This will take two! If your valve is recessed pack an old poly bag round thevalve to divert the water into your Bath / shower tray then turn the hot andcold valves on one at a time and allow the water to flush through for about15>20 seconds. The person who is helping you should watch that the wateris not going anywhere that is going to do any damage also they should watchthat the amount of water coming from the hot and cold they should be roughlythe same. If you do these checks and you still have a problem then wecan replace the cartridge .......Having said that this is a very unusual fault. Answered 132 days ago | The doc |
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Q: Shower was producing poor pressurre so having checked inlet supply OK - I bought a new 903.33cartridge.
When fitted I found I could not get hot water but cold only pressure good. To test - I reversed the cartridge and found I was getting good pressurre hot but no cold (which I should expect - just wanted to be sure that both hot and cold supply at good pressure was getting through. Shower fitted in 200/2001. I was running with normal low pressurre - prior to the problems but amn told that our pressure is quite high - should I try high pressurre setting on cartridge??
Failing this - any suggestions??
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Submitted 132 days ago | by
joe, northampton
A: I would give thepipe work a flush out in the first instance Strip out thecartridge and make sure that it is set for low pressure. When it is out givethe pipe work a flush out. This will take two! If your valve isrecessed pack an old poly bag round the valve to divert the water into yourBath / shower tray then turn the hot and cold valves on one at a time and allowthe water to flush through for about 15>20 seconds. The person who ishelping you should watch that the water is not going anywhere that is going todo any damage also they should watch that the amount of water coming from thehot and cold they should be roughly the same, if it is not then you have aproblem with the plumbing. When refitting thecartridge make sure that the filters are clear before refitting. If this doesn’t fixit then get back to us Answered 132 days ago | The Doc |
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Q: THE SHOWER WILL NOT WARM UP, ITS A MIRA EXCEL POST 1990
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Submitted 149 days ago | by
effinfreezing, OL2 8LS
A: Regarding the temperaturefluctuation or cool running it could be a faulty cartridge however to checkthis, see if you can get hold of the hot supply pipe before it enters theshower or perhaps as it leaves the boiler. If when holding this pipethe temperature fluctuates or goes cool then the problem is not with the showerbut more likely with the boiler as the shower can only deliver what the boilersends to it. # Disregard the temperature atthe taps as they have a different flow rate. If the problem is traced tothe shower then you will need a new cartridge, however it may be worth whilestripping the cartridge out and making sure that the filters are clean andclear before ordering a new cartridge. Answered 149 days ago | The Doc A: Regarding the temperaturefluctuation or cool running it could be a faulty cartridge however to checkthis, see if you can get hold of the hot supply pipe before it enters theshower or perhaps as it leaves the boiler. If when holding this pipethe temperature fluctuates or goes cool then the problem is not with the showerbut more likely with the boiler as the shower can only deliver what the boilersends to it. # Disregard the temperature atthe taps as they have a different flow rate. If the problem is traced tothe shower then you will need a new cartridge, however it may be worth whilestripping the cartridge out and making sure that the filters are clean andclear before ordering a new cartridge. Answered 149 days ago | The doc |
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Q: I get no movement when trying to rotate to achieve the right setting using the key, should it turn freely?
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Submitted 153 days ago | by
brickie, Kent
A: This does not rotate freely and considerable force is required , but it will turn Answered 150 days ago | Alastair |
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Q: Could not find any instructions for setting high or low pressure with my new cartridge. Does this setting mode refure to the hot or cold water?
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Submitted 187 days ago | by
grandadpeter, Greater Manchester U K
A: There should be a red key that fits in to two holes at the back of the cartridge high and low stamped into the back of the cartridge using the key you turn the back of the cartridge to high or low. High for combi boilers and pumps over 2bar Low for gravity systems and pumps under 2bar Answered 185 days ago | The Doc |
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Q: How do you strip the cartridge to check the inlet filters are clean?
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Submitted 249 days ago | by
joeykins, Hertfordshire
A: If you click on the link below it will take you to an exploded view of the Excel. The temp control simply pulls off and the remaining shrouds and knobs are clipped on and to remove release the clips. Once all these are off take out the 4 screws that secure the cartridge then it will just pull out. Remember to lubricate the seals before reassembling. http://www.showerdoc.com/shower-spares/mira/MIRA-PARENT-106-Mira-Excel---post-1996 Answered 248 days ago | Alastair |
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Q: The spare part number for my Excel cartridge (which is leaking at the head) is 903.27. Can this be replaced by the 903.33?
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Submitted 282 days ago | by
bogtrotter, Dublin, Ireland
A: Hi Cartridge Mira903.33 This cartridge supersedes theprevious high and low pressure versions See below this may help If you have problems with an Excel then it's best just toreplace the cartridge, however it is probably worth stripping the cartridge outand 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. justunclips 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 withcartridge) Slip new cartridge into place remember to check that the newseals 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 thecartridge temperature, instructions with cartridge) Easy peasy!!!! Cartridge Mira903.33 This cartridge supersedes theprevious high and low pressure versions Link to cartridge http://www.showerdoc.com/shower-spares/mira/MIRA-903-33-Cartridge-Assembly-(Up-To-2003---Black)-Comes-with-seals Answered 282 days ago | The Doc |
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Q: Hi
My excel shower, about 9 yr old is not drawing in cold water and when the temp gauge is turned down to its lowest setting, the water is still warm and the water spurts out in rythmn with the pump.
Is this a pump problem or is a new cartridge required.
thankx for help
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Submitted 302 days ago | by
marionad, Fife
A: Hi 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 and in your case also check the inlet filters on the pump 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 Answered 302 days ago | The doc |
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Q: The cartridge is making a squeeling noise that only happened after work was carried out on the mains. I think that the filters may be require replacing how do I do this or do I need a new cartridge?
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Submitted 330 days ago | by
ooreck, Dundee, Scotland
A: Hi The squealing noise is caused by a worn cartridge or by imbalanced pressures for example the pressure in the cold supply is much higher than the hot. 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 or check the filters 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 you should now be able to see the filters. If you are replacing the cartridge, 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 http://www.showerdoc.com/shower-spares/mira/MIRA-903-33-Cartridge-Assembly-(Up-To-2003---Black)-Comes-with-seals Answered 329 days ago | The Doc |
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Q: 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
thanks
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Submitted 331 days ago | by
les, Harrogate
A: 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 http://www.showerdoc.com/shower-spares/mira/MIRA-903-33-Cartridge-Assembly-(Up-To-2003---Black)-Comes-with-seals Answered 331 days ago | Anonymous |
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Q: After a shower, I turn off the both controls to zero
but water still comes through to the shower head either in a slow dribble, or a steady flow.
The only way that I can stop/reduce the flow is to bang/thump the shower body with my hand. It doesn't always work, but it is the best I can do.
What is your best solution to my problem??
Regards
A D Cox
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Submitted 369 days ago | by
Foxxy, Fairford, Gloucestershire
Answered 366 days ago | The Doc
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Q: We have Mira Excel fed from a header tank and boosted by an electric pump.The shower keeps cutting out - is this the shower unit or an electrical problem with the wiring/pump?
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Submitted 382 days ago | by
fred, manchester
A: First I would check that the inlet filters on the shower and on the pump (if it has them) are clear, if these are OK then it points to a problem with the pump its self. Answered 380 days ago | The doc |
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Q: I have replaced the cartridge on my mixer shower because the old one (410.12) was dripping. The flow rate on the new one (903.33) is acceptably low and varies from just OK when you start a shower and then gradually gets less. I have two Excel Mira showers - both are gravity fed directly from the hot and cold water cylinder/tank respectively.
I have checked the pressure setting on the cartridges and this is as it was on the old one (low pressure). I have also checked the filters and they are aslo clear.
Any ideas what is going on?
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Submitted 438 days ago | by
RichardM, Harrogate, UK
A: Check that the shiower hose is not kinked or collapsed internally and the shower head is clear. Easy way to check is to remove hose from valve and check flow. Answered 436 days ago | Alastair |
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Q: My mira bought in 1991 was described as "Mira excel TB" BIV. Only cold water now and I need a new cartridge. Will your 903.33 be the correct one? I will also replace the external fittings which are now very yellow! If I look at Mira Excel BIV 1990-1996 will they all fit?
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Submitted 443 days ago | by
Frugal diy-er, cornwall
Answered 442 days ago | The Doc
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Q: In 1993 I fitted a Mira Excel TB Thermostatic Mixer Shower ~ and the box tells me it has a low pressure cartridge. Turning the control is stiff and it seems it is time to replace the cartridge.
1. Is the Mira Cartridge 903.33 at £97-02 the correct replacement cartridge ? (The part no is not the same as mentioned in my 1993 installation booklet that came with the shower).
2. Your website shows a Red Key to go with this cartridge. What is this for? When I fitted this shower in 1993 there was no key.
3. The present shower installation is gravity fed from a hot water cylnder and cold water tank in the loft. If I change my boiler to a more modern boiler ~ Combi etc ~ sometime in the distant future, will this shower with the new cartridge be compatible. I realise this will require different pipework.
Regards,
William
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Submitted 456 days ago | by
William, Tyneside
A: The Cartridges were high and low pressure, the current 903 33 by using the key changes it from High to Low, with a combi all you will need to do, assuming the pressure is high enough is switch it to high pressure. Answered 456 days ago | The Doc |
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Q: Hi, we've had the Excel fed from a combi-boiler for about 7 years. Recently we are finding it hard to get any hot water out of it, it's just about warm. We've been told by a heating engineer that the fault lies with the boiler and want's to fit a pressure reducing valve. This is a new problem, it has been fine for years, after reading this site I get the impression that it may be the cartridge, we live in a very hard water area. What do you suggest the best thing to do is?
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Submitted 459 days ago | by
Lambechop, Worcestershire
Answered 458 days ago | Alastair
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Q: I have a Mira excel shower and there does not appear to be enough hot water getting through to the shower head.
I have removed the cartridge assembly and cleaned out the filters and renewed the seals. It still does not allow the hot water through. I can feel the chrome housing on the hot side is very hot to touch but does not reflect this at the outlet. Do I need a new cartridge assembly
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Submitted 466 days ago | by
Rob, Cheshire
Answered 462 days ago | Alastair
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Q: Rather than changing the cartridge for £97 could I change the seals for £4.16 instead?
If so, is it staightforward - any diagrams available?
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Submitted 474 days ago | by
Stubby, Sheffield
Answered 471 days ago | Alastair
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Q: my shower has very little pressure coming through. Water pressure seems fine at the sink taps but the shower has hardly any pressure. It's been suggested I get a new cartridge?
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Submitted 475 days ago | by
ande, derby
A: Hi 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 http://www.showerdoc.com/shower-spares/mira/MIRA-903-33-Cartridge-Assembly-(Up-To-2003---Black)-Comes-with-seals Answered 475 days ago | The doc |
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Q: Hi I recently fitted one of your replacement Mira Excel B pre-2003 compatable cartridge to replace the faulty old high pressure one. I now find that the temperature adjustment is very sensitive, changing from cold to hot with very little movement of the knob. The new instructions made some mention of refering to the original ones to set the temperature range but these have long since vanished. Any suggestions as to how to fix it?
many thanks.
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Submitted 483 days ago | by
toohot-toocold, Durham
A: This is unlikely to be caused by the temperature range adjustment being wrong but is more likely to be a supply problem.
If your shower is fed from a combi boiler or an unvented hot water cylinder then it is possible that the cold water supply pressure is too high for the hot and a pressure reducing valve in the cold supply to the shower is required.
It is actually more likely that the shower is reverse plumbed and hot and cold supplies are swapped. Industry standard is hot to left and cold to right.
If your unit is reverse plumbed it is easily corrected, just remove cartridge turn through 180degrees and refit. Fit the knobs right way up and thats it.
Temp range adjustment is simply done by removing temp knob and turning hub until required mid range temp is achieved removing hub without turning spindle and refit in vertical position, may take several attempts to achieve desiresd temperature. Answered 483 days ago | Alastair |
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Q: i have 2 mira select showers in my home and now both struggle to get a descent spray when used in fact its more of a rickle . can u give me any idea as to the problem
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Submitted 489 days ago | by
melo, cheshire
A: Hi If you have problems with an Select 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. When the cartridge is out give the pipe work a flush out. This will take two! If your valve is recessed pack an old poly bag round the valve to divert the water into your Bath / shower tray then turn the hot and cold valves on one at a time and allow the water to flush through for about 15>20 seconds. The person who is helping you should watch that the water is not going anywhere that is going to do any damage also they should watch that the amount of water coming from the hot and cold they should be roughly the same. 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 Answered 489 days ago | The Doc |
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Q: MY SHOWER IS VERY STIFF TURNING ON AND OFF COULD YOU TELL ME IF I NEED A NEW CARTRIDGE I T IS A POWER SHOWER OFF A INDIRECT CYLINDER SYSTEM.THANK YOU.
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Submitted 506 days ago | by
mike, aberdeen
Answered 503 days ago | The Doc
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Q: Hi
Can you help?
On your diagram shower valve cartridge part No. MIRA 903-33 it shows the end cap as
Blue the one I have on my valve is Yellow is there any difference between the valves
Keith
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Submitted 538 days ago | by
Unstable
A: No they are interchangeable, you have a fairly early model. Answered 538 days ago | Alastair |
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Q: My excel mixer is no longer drawing in cold water. There is an odd click when the thermostat knob is turned. I opened the mixer up as far as the cartridge. The image you have shows a red tab on the upper side of the cartridge as photographed. On the reverse side is a blue plastic tab. The tab is broken off. Am I correct in assuming that the cartridge assembly requires replacement?
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Submitted 542 days ago | by
Ian
Answered 541 days ago | The Doc
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Q: My daughters shower head has a constant trickle from it, can the cartridge be stripped down to fix or does a new cartridge need to be bought?
If so, is it easy to fit?
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Submitted 575 days ago | by
kd
A: The cartridge is a sealed unit therefore it needs replaced. 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 http://www.showerdoc.com/shower-spares/mira/MIRA-903-33-Cartridge-Assembly-(Up-To-2003---Black)-Comes-with-seals Answered 574 days ago | The Doc |
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