TREVI CTV shower valve.

[nice sax]

Hi are there any plumbers out there than can help me. I recently had a TREVI CTV shower fitted in place of a MIRA 88 that was leaking. It was fitted by the home improvement agency who used a plumber that seemed to have little knowledge of this unit and has had to come back twice to get the shower working. However the shower has only 50% of the pressure of the MIRA. Could the problem be that as the unit can be used on both multi combi boilers and gravity fed as mine that he has failed to remove the FLOW RESTRICTORS that are used to stop the system cutting in and out on a combi boiler.

As I am only a pensioner reading the fitting leaflet it may be I have got the complete wrong end of the stick.

Can anyone help me solve this problem?

[terence7556]

how about their helpline on the ideal standard site on 0870 1296085

[AlBags]

I believe Trevi insist that the flow valves/filters are fitted in the hot/cold feeds to preserve warranty. I fitted a shower unit recently .. and they will certainly restrict the flow to a degree.
All I can offer sorry .. not a solution.

[buildersmate]

I can't speak with 100% authority on this unit but there is often a difference between the filters and the restrictors.
The filters might be expected to be left in place to prevent crud getting into the mixer mechanism (and hence the warranty invalidation comment), but it is true that many units also have restrictors in limit the dynamic water pressure input to the unit. But I don't have detailed knowledge on Trevi.
If there is a restrictor in there, it sounds to me a good idea to remove it.
However it is also true that different shower units have different minimum pressure requirements to produce the same level of oooomph at the showerhead.