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The pump curves below show the results achieved with a single SP2B ShowerPowerBooster pump. For two pumps fitted in series, as supplied in the SP22S kit, the available pressure is approximately doubled.
A pump’s output is always a balance between pressure and flow, determined by the electrical energy supplied to the pump.
When a fixed amount of energy is transferred to the water, it can increase both pressure and flow. Every application therefore has an optimum balance between the two.
To produce a strong spray pattern, a WrightChoice shower head used with a single ShowerPowerBooster creates approximately 2.3 metres of head loss at the shower head and delivers around 5.9 litres of water per minute.
A typical shower producing 6 litres per minute may mix approximately 4 litres of hot water with 2 litres of cold water. When assessing the required hot-water boost, use the 4-litre hot-water flow rather than the combined 6-litre flow.
Remember that showers mix hot and cold water, and your existing shower head may not perform as efficiently as the WrightChoice shower head. Your mixer may also have been designed for higher-pressure Central European systems rather than the lower water pressures commonly found in UK homes.
Where additional performance is required, you can double-boost the hot supply with an SP21S or balance the hot and cold flow with an SP22S.
