Any mixer shower can be used with an electric pump from a gravity fed system to give higher flow rates and thus create a power shower. Pumps cannot be used with combination boilers, unvented or pressurised mains systems. If you are in any doubt regarding your plumbing system see the
Plumbing Systems Simplified information page.
As a very general rule shower pumps and bathroom pumps are available to suit pressure ranges from 1.50 bar to 4.30 bar, with inlet and outlet connections of 15mm or 22mm (depending on model), they are suitable for gravity systems only and will require an electrical connection with a Double pole isolating switch. It is best to check the specifications for each item before you make a purchase as these do vary.
A good example of a pump to boost a shower only is the Salamander Right twin 2.25 bar pump. To boost an entire bathroom use a pump like the Salamander Right twin 2.25 bar whole house pump.
In certain circumstances it is possible that you may require a negative head pump, for example if you are converting your loft and the shower / bathroom is above the water tank (pumps usually require 200 ? 300mm vertical distance from water level in tank to handset). In this situation a good solution is the Salamander ESP CPV range of pumps as all ESP pumps share the advantages of an inbuilt pressure vessel and positive or negative operation at the flick of a switch. An example of this type of pump is the ESP CPV 1.30 bar Twin pump.
Salamander ESP CPV 1.3 bar twin pump
Points to note:
* Pumps can only be used in gravity fed installations
* Supplies to pumps should be dedicated and separate from other devices
* Individual pumps require a minimum head to operate automatically (varies from pump to pump, usually 200 - 300mm vertical distance from water level in tank to handset), if this is not achieved a negative head kit or negative head pump may be required
* Pumps will empty both hot and cold tanks more quickly than a standard system, please keep this in mind when selecting size of pump. You may want to check the capacity of both water tanks and think about how long and often the shower will be used
* Pumps must be installed to all relevant IEE Wiring Regulations (BS7671) and be protected with a Residual Crrent Device (RCD)
* A pull-cord isolating switch should be fitted, or a standard isolating switch which is out of reach of person using bath/shower
* It is advisable to fit easily accessible isolating and non-return valves to both inlets (where not already supplied). This will ensure future maintenance is made easy and compliance with Water Regulations. If in doubt consult your local water authority.
Don`t forget ? If you are confused or unsure in anyway why not post a question on our forum, after all that`s what we are here for. And there are plenty of plumbers and installers ready to give their words of wisdom and advice.
And, now for the legal bits - All information and details given within these pages are for information purposes only, Tap-advice.co.uk cannot accept any responsibility or liability for any preparation work that is undertaken based on such specifications or information shown on our site. We always recommend that you obtain advice from a suitably qualified plumber before making a purchase or arranging any installation. Remember it is always best to employ a professional to complete works.
