Hi,

I just fitted a Swirl thermostatic mixer shower (suitable for high/low pressure systems). Cold water is mains and hot is via a Worcester 24i RSF combi boiler. The water is either scalding or cold with no in-between. Do I need a pressure reducing valve? If so where on the system to put it - after the mains stop-tap so the pressure is equal on both hot & cold..?

Cheers, Tec...

providing the input pressure is no greater than 5 bar you wont need a prv.

sounds like the mixers faulty to me.

the hot is on the left isnt it.

This thing came from Screwfix and strangely, the hot is on the right... The combi boiler strikes me as the issue...

if the hot is currently piped to the right hand inlet thats the problem.

all the bar mixers that ive ever fitted they always pipe-up left hot, right cold.

Thanks, the left is the flow control, right the thermostatic knob right?

http://www.screwfix.com/search.do?_dync ... &x=12&y=4#

This is the one

forget the on & off controls, and the mixer knob.

what i am saying is wether the hot supply enters the mixer on the lefthand inlet.

Rio was thinking more the pipe connections at the back

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Thanks for the advice, will take a look and report back..!

Thanks all, crossed supplies