Trinity backflow issue?
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)?
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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Bristan Thermostatic Brass Cartridge - Cart 06732COMPL
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