My shower failed (just after the guarantee expired). It only runs cold now. I disassembled it and found that it contains a "Valquest" cartridge - no model number, just several patent numbers - that looks similar to this:
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I try to get an identical replacement, or is there a more reliable alternative that will fit?
(I tried reinserting it upside down, and it produces only hot water, so I am confident the problem is not with the supply.)
-- Richard