Hi.
We have just had a new pumped shower system fitted, and it all works great except every now and then the pump tends to ‘hunt’ I think that’s the right terminology! Anyway it continually switches itself on and off and consequently the flow of water is repeatedly interrupted. When it is doing this if you switch off the shower at the mixer bar and switch it straight back on it works fine again. Any ideas why it does this?

Also, when the pump is running it can be heard all over the first floor area, I believe that this is because it is mounted directly onto the ceiling rafters in the loft and the noise is the vibration being spread along the rafters. Should or can the pump (1.5 Bar Salamander pump) be fitted on some form of anti vibration mounts.

Thanks in advance for any advice.

It's installed in the worse place possible for starters.

What is the head, (tank height above the pump)

Which pump is it, and what is it serving.

Single or twin.

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Hi Scruff.

Thanks for the quick response.
I will have to check on the pump details when I get home tonight. I think it’s a twin Salamander pump as it serves two power showers (one upstairs and one downstairs) and the hot water to the upstairs and downstairs shower rooms hot water taps.

The cold water tank is positioned on a small platform approx 50cm above the rafters in the loft, the pump is positioned directly underneath this water tank. The immersion tank in one of the bedrooms on the floor below but on the other side of the house.

By the sound of it I wouldn't expect it to work very well, if at all.

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Hi again.

I have checked the pump, it is a Salamander RSP 50, which I believe is a twin pump specifically for showers and has a working pressure of 1.5 bar.
The pump is positioned in the lost very nearly above the hot water cylinder. The pipes from the pump to the upstairs shower are flexible plastic 15mm x approximately 9m long. The pump is just sitting on a board on the rafters so to quieten will be easy to do.