Booster pump not working

[ejfshare]

I have fitted a booster pump to the hot water supply of my shower. When I test it into a bucket it works fine. When I conect it to the shower (with the shower on), it works fine. As soon as I switch the shower off and then on, the pump will not engage. I have since fitted a non return value thinking that was the issue, but still no joy.
Any thoughts welcome?

 

[mogget]

Where is the cold supply for your shower coming from?

How far above the showerhead is the cold water storage tank?

 

[ejfshare]

The cold comes in from the main. so the pump is only on the hot. It is a flat, so the header tank is around the same height as the shower head.

 

[mogget]

The cold comes in from the main. so the pump is only on the hot.

Hmmmm.

It is a flat, so the header tank is around the same height as the shower head.

Is this a negative head pump?

What about the cylinder, is it a combination (fortic) cylinder?

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• mogget
• 27 May 2009
• 2

or a standard cylinder with a cold water tank?

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• mogget
• 27 May 2009
• 1

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• mogget
• 27 May 2009
• 1

If the tank and shower are at the same level, how will water flow so that the pump can start up?

 

[seco services]

as said its not going to kick the pump in with the cws same height as the shower head.

what shower mixer have you got ?

 

[ejfshare]

Yes, is sounds like it is a negative head problem. I just spoke with Salamander and they have recommended a different pump, (I guess you should never listen to the guys in the shop). I hope this will cure it. Many thanks. Ed

 

[seco services]

you'll be better running both hot/cold from a pump not cold from mains

take the shower head off and lower the hose in the bath will it start then ?