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It feels a bit wasteful to order 2 new cartridges, but the maintenance sheet tells me I should replace both if replacing one. One cartridge is so much stiffer than the other that I think that is really the problem. Both clutch wheels seem much the same, and having worked the stiff cartridge on...

I posted earlier that I had a problem with a Trevi Pre1996 shower mixer. The shower cut out, and I suspected it was because the cold water shut off. I've taken it apart, and I find that the cold water cartridge is very stiff: it requires at least twice the torque of the hot water...

I plucked up courage and used brute force with a longer lever, and no damage done.

First, having inspected underneath the plate, I've decided I must have the Trevi Therm Pre '96 shower mixer (http://www.showerdoc.co.uk/shower-spares/trevi/Therm Pre 96.html). I originally assumed I had the Trevi 300 version because the pre '96 unit shouldn't have a cover plate hiding the...

seco, thanks. Easy indeed to get off once you gave me the courage to try.

We have a Trevi shower which has developed a fault. The water supply suddenly cuts out. If the shower is turned off for a few seconds, and then turned on again, the shower recovers, however it is likely to shut off again after a short while. We have a second shower driven from the same pump...

I have a Trevi mixer shower of the type shown in http://www.showerdoc.co.uk/shower-spares/trevi/03.html which is playing up. I can't see how to take it apart. I'm fairly sure I need to remove the front cover plate (item 1 in the referenced drawing), and my strong expectation is that I just...