I had a new (triton) thermostatic mixer shower installed last yr. Hot water comes from the new-ish combi boiler and cold from a tank in the roof of the block of flats.
The hot water supply is great - hot and good pressure - but the cold water pressure is low, little more than a dribble when at the coldest setting.
I recently had an engineer from the manufacturer round to replace the shower valve due to scaling as it was sticking/stuck. He said that the flow problems were due to the high hot water pressure from the combi and low pressure from the cold water tank and that there was no way round this problem, regardless of shower type.
Does anyone know if this is right, or can anything be done to solve this problem?
I've seen references to pressure reducing valves - would it be worth fitting these to hot/cold water supply to the shower?