On 08/05/2019 17:14, Martyn wrote:
I had an overhead rain shower installed....simple knob turn on/off and
hot/cold...cold water mains fed was okay coming out of shower head...hot
was
dribbling out...so installed a salamander 1.5 bar positive pump...now
the hot
over rides the cold even when the knob is turned fully cold...not sure why
pump is still running then...cant get a mix of hot and cold and it's too
hot
to shower in...help

It sounds like you are trying to mix mains cold (at a fairly low supply
pressure) with hot from a pumped gravity fed cylinder.

The normal way to do this would be to take a low pressure cold feed from
the cold cistern to the shower rather than mains cold. Then use a shower
designed for low pressure operation. Alternatively a twin impeller pump
can be added to pump both sides.

An alternative would be to fit a venturi shower - these use the cold
pressure to assist the hot supply. Probably not going to work with a
soaker head though.

Other options would be replacing the hot water cylinder with an unvented
one that runs at mains pressure.



--
Cheers,

John.

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