Trinity backflow issue?

Our Trinity shower was on a pumped circuit - was always too hot for my liking, even when on cold. Now that we've installed an unvented (megaflow type) system and got rid of the pump, the hot taps give out cold water - unless another hot tap is turned on in which case one of the two will get hot!

I'm thinking this is an issue with the cartridge. Will the 06732COMPL cartridge fix this (ie will it stop backflow/cold water pushing into the hot pipe)?
Asked 12 years ago by Anonymous

This is a bit difficult to understand what is happening without being there to see the fault, however.....


The cartridge is only designed to deal with roughly equal pressures  you may have a situation where the cold is directly off the mains and the hot pressure is reduced as it goes through the megaflow this would mean you may have to fit a pressure reducing valve to the mains.


It may be possible to fit a non return valve into the hot supply however the very first thing I would do is strip the cartridge out and make sure that the filters are clean.

Answered 12 years ago by The Shower Doctor

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