Detailed instructions are sent with every Shower Power Booster to help you get the best out of our products and there is a fitting advise helpline, however, for a downstairs tap or shower you already have pressure of 4 to 6 metres head. A single Shower Power Booster adding 4 metres head will only double the pressure.

Going for a double boost kit will deliver the equivalent of mains water pressure and to do this you need a SP21S kit. You can try a single SP2B and upgrade to a SP21S later if you find you need to if you prefer.

Buy an SP21S double boost kit now.
Upgrade a SP2B to a SP21S kit now.