Boosting Pressure and Flows in Gravity Systems with Mains Pressure Cold
ShowerPowerBoosters are a great solution for anyone who wants a good shower and tap flow and has gravity hot and mains cold. If your cold is mains supply and your hot is gravity then we recommend you double boost the hot with a twin pack SP21S pump kit at £155. Four out of five customers fit a single ShowerPowerBooster and fit SP2B at £125 on the hot and this will give a good shower but the SP21S will give a great shower with close to the equivalence of mains pressure on the hot.
The majority of mixers will balance differential pressures of 4 or even 5 to 1 so no problem. For some shower/tap mixers there is a requirement for balanced flow (similar pressures on hot and cold). If you have a shower mixer which needs balanced flow the high pressure cold restricts the low pressure hot, a SP2B (single boost) or a SP21S (double boost), will balance hot and cold pressures.
You can always try just the one pump and then upgrade with a SP1U at £55 but getting the job done in one hit is often favourite.
Click on the link below to see the latest 2021 ShowerPowerBooster Information Manual for all applications and fitting instructions.