Choosing the right water pump for your shower
There are several factors to consider when choosing the best shower pump for your home:
- Positive or negative head system?
You have a positive head system if your showerhead is below your cold water storage tank. This is often the case if your water tank is in the attic. To boost your water pressure, you’ll need a positive head shower pump.
You have a negative head system if your showerhead is level to or above your cold water storage tank. If you have this system, you’ll need a negative head shower pump.
This can also be used if you have a positive head installation, so if you have one positive and one negative, a negative head shower pump is a good choice.
- Twin or single shower pump?
A twin shower pump is designed to be installed on both your hot and cold water supplies. This ensures that both supplies are boosted at the same level, which is particularly effective for mixer showers.
A single shower pump can only be installed on a single water supply – hot or cold. They are usually used to boost hot water, when the cold water is mains fed and the hot water needs to be boosted to match this pressure.
Shower pumps are rated in ‘bar’. The higher the bar rating the higher the pressure. As a general guide:
- 1.0 bar – ideal for smaller shower heads
- 1.5 bar – ideal for normal showers
- 2.0 bar – ideal for two or three showers, taps or appliances
- 2.5 bar – ideal for power showers and larger shower heads
- 3.0 bar – ideal for power showers, larger shower heads and body jets