Installation Instructions

In Line Micro Pump Product Range

Shower Power Boosters can be installed wherever is most convenient, see diagrams below. Ensure that the pipework is isolated and free from water before cutting the pipe.

It is important your pipe accurately. Failure to do so could impact on the quality of your jointing. If your cut is not flat, or your pipe is too short, the pipe may not hit the pipe stop compromising the joint integrity. Too long and you may introduce strain into the whole system.

Once you have removed 115mm of pipe you can insert the pump and tighten the compression joints

Pumps can be fitted unsupported on existing pipework and can be fitted at any angle or orientation.

Once connected and turned on the LED light on an SP2B will indicated the status of the pump.

Constant LED = Pump has power. Fast Flashing LED = Pump detects flow and is running. Slow Flashing LED = Transformer fault.

For gravity systems, our whole house solution is the most popular choice. Installing a pump next to the hot water cylinder, but after the vent pipe, will boost the flow rate for every tap, shower & application in the house.

Sometimes there is just one tap, shower or application which is letting you down with poor flow rates & low pressure. The Shower Power Booster does not cavitate so you are able to install it on the feed which only supplies a specific tap or shower. This will not only improve the flow for the specific outlet, it will also maintain the flow even if other taps are being used in the home.

A single Shower Power Booster is sufficient for most installations. A good shower or tap mixer should be able to cope with pressure differentials of up to 4 to 1.

If your hot and cold supplies are both very low gravity pressure, or your mixer struggles to balance pressures, then you may need to install a pump on both the gravity hot and cold feeds. This will not only improve all water outlets, but will also keep the system balanced.

A single Shower Power Booster is sufficient for most installations. A good shower or tap mixer should be able to cope with pressure differentials of up to 4 to 1.

If your hot and cold supplies are both very low gravity pressure, or your mixer struggles to balance pressures, then you may need to install a pump on both the gravity hot and cold feeds. This will not only improve all water outlets, but will also keep the system balanced.

If you have a gravity hot feed and a mains fed cold feed then you have a mixed system.

If your mains fed cold is higher than the gravity hot side and you are having issues due to this imbalance you will need an SP1U Shower Power Booster to give the gravity hot side an extra boost.

Combination boilers are fitting with a pressure sensor and if the pressure of the incoming mains cold water supply drops below 1.0 bar the gas is turned off. The Shower Power Booster can be legally fitted to the incoming mains cold supply to increase the pressure and flow rate to stop this from happening.

In most cases a double pump SP21S is enough to keep the boiler active by adding around 0.4 to 0.6 Bar to the pressure preventing the combination boiler from falling below 1 Bar.

Although the output of a combination boiler greatly exceeds the output of a Shower Power Booster you can still expect to protect flow rates of 6 litres a minute to showers and around 8.5 litres a minute to mixed flow to taps.

A Shower Power Booster works on the hot side of any Combination Boiler to boost & protect a shower or tap. It increases the flow and gives that flow priority over other taps being used.

For demanding situations a pump on the hot and cold may be required SP22S.

All electric showers are fitted with a pressure sensor and if the pressure of the incoming mains cold water supply falls below 0.8 Bar, the electric shower will switch off heating elements and you will be left with a cold shower or boiling hot water. Adding a Shower Power Booster will increase the pressure and flow rates to stop this from happening. If your incoming cold water supply is exceptionally low then you may need to add a second pump to double boost.

Although a Shower Power Booster will keep your electric shower active, it is important to note that all electric showers are limited by the KW rate to the amount of water it can heat, we would therefore advise that you measure the flow rate at maximum hot 42oC from your electric shower as you may already be getting the maximum flow rate from your electric shower:

7.5 KW Electric Shower 3.5 litres a minute

9.8 KW Electric Shower 4.7 litres a minute

12.5 KW Electric Shower 6.0 litres a minute

A Shower Power Booster can be used to drive water towards or from a radiator or group of radiators which are not getting hot. In many homes radiators do not get hot due to air locks, poor pipework or due to being located some distance from the boiler.

You can install the pump on either the flow or return to the radiators. In 2020, we are launching a range of mini micro pumps for radiator boosting some of which can attach to the radiator or be hidden behind the radiator and they will be suitable for 8mm, 10mm & 12mm pipework. On our website search: Mini Radiator Power Boosters SPB