Booster pumps are small machines that are designed to boost water flow to your shower. There are various kinds of showers and shower heads out there, which means that they each require different bar pressures and pumps. Bar pressure is the pressure required for the shower to function at maximum capacity, and there are pumps for every bar pressure.

If properly installed and taken care of, shower pumps last for around eight years on average. Higher quality pumps may last up to double that amount of time with proper care and maintenance. 

Can You Fit a Booster Pump to a Combi Boiler? 
A combi boiler is a water heater and central heating boiler in one unit. Combi boilers are excellent ways to conserve space in a home, but the lack of a separate hot water cylinder means that you cannot install a shower pump to this system.

There are alternative cold-water mains boosters available for those who have combi boilers. Shower pumps are specifically designed for use in open vented hot and cold systems. 

What’s the Difference Between Negative and Positive Booster Pumps?
​Before you purchase a booster pump, you need to check what kind of set-up you have or want to install. If your shower head is below your cold-water tank and the flow rate at 0.6 litres a minute, then you need a positive shower pump.

Positive booster pumps use gravity to allow the water to flow downwards. If your shower head is level with or above your cold-water tank, then a negative shower pump will be required.
Negative booster pumps have a pressure switch that recognizes when the shower is on even if the water is not flowing. If you are unsure which type of shower pump to purchase, a negative shower pump works with both a positive and negative installation. 
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