Just fitted a salamander CT75 pump to a new shower, one of those antique types with an 8" rose and separate hand held flexi head) I have 400 lts water storage in the loft with approx. 600mm head over the shower rose.
When I turn the shower on nothing happens however if I lower the separate flexi shower head to waist level the water starts to flow and the shower pump kicks in, I can then switch over from the flexi head to the 8" rose with no problems. Once off, I have to re-do this process.
I did wonder if the fact that I routed the plastic pipe from the pump to the shower head above the cold tank in one long length (to avoid joints and minimise sharp bends) might be causing this or is it more likely that I just don't have quite enough height on the cold water tanks.
When I turn the shower on nothing happens however if I lower the separate flexi shower head to waist level the water starts to flow and the shower pump kicks in, I can then switch over from the flexi head to the 8" rose with no problems. Once off, I have to re-do this process.
I did wonder if the fact that I routed the plastic pipe from the pump to the shower head above the cold tank in one long length (to avoid joints and minimise sharp bends) might be causing this or is it more likely that I just don't have quite enough height on the cold water tanks.