shower head

sir, a client of mine has a thermostatic mixer bar, twin impeller shower pump 1.5 bar the pipe work should be 22 but is reduced to 15mm behind the wall tiling to the mixer. the pump oscillates when at their selected temp. no problem on cold I believe the flow is not enough to operate the pump every time and proved this by removing the shower head, satisfactory. The shower rail attaches to the hose 1/2 fitting so i wondered if the Mira RF1 would give a good flow of water through the pump.
Asked 8 years ago by Paul
Mira RF1
the above may work, but I would check the hot water temperature coming into the pump, as this may be too hot and lead to cavitation.
The shower may also be in a negative head situation which is stopping it from coming on. To test this , put the head down and turn on the shower. If it comes on every time it maybe because it is the wrong pump.

Answered 8 years ago by Anonymous

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