You can increase the pressure to combination boiler if you fit the SPB on the cold pipe before a combination boiler or you can increase and protect the pressure and flow if you fit it on the hot pipe after the combination boiler. Our pumps can either stop a combination boiler overheating because of low flow or can generally increase the flow on a long length of pipe. The pump is designed for high temperatures and pressures and is the only pump we know will do this. The maximum effective flow boost is up to 6 litres off water (ideal for a shower). Combi Boiler have a pressure sensor which cuts out when the pressure is too low. They do this because if it were to heat just a small quantity of water it would ‘Kettle’ the water such that a small trickle of boiling water will be emitted. To avoid this a pressure sensor turns off the heating as soon as the pressure drops below the minimum pressure set by the manufacturer. We always recommend that if there is a problem with a combination boiler you fit two shower power booster pumps in series Dependant upon the model of combi boiler the pressure switch will be set at between 1.0 bars and 1.5 bars (8 metres head to 15 metres head). When a single SPB starts to pump it will create an additional head of 5 to 6 metres which may cause a combi boiler to start but as soon as the flow rate reaches 5 litres a minute the pressure added by a shower power booster will reduce to 3 metres. If this occurs the boiler will run hot and cold in cycles. When two SPB in series start to pump they will create an additional head of 10 to 12 metres which reduces to an additional 6 metres head when the flow is 5 litres a minute. Since we are not responsible for the pressure switch in individual combi boilers and electric showers or the pressure you are starting with we can not predict if you need one or two SPB. We suggest that for most electric showers a single pump is adequate but for combi boilers which tend to have higher outputs then the SP21S is the best starting point. You can boost showers or taps in your home up to the maximimum capacity of your combi boiler. When others open taps in your home, provided you do not exceed the output of your boiler, the shower you protect will continue to flow strong and good.
SPB One Automatic & One Manual Water Pressure Pump
The WRight Choice micro booster cannot create hot water but it can take enough hot water to create the perfect shower. A good shower needs enough water to wash away the suds and enough pressure to give a nice forceful spray pattern. We aim to give 6 litres a minute and a minimum of 3 metres head to achieve this. The maximum flow from a Combi Boiler is determined by its KW rating and in winter because water is colder the output is less: 24KW Combi Boiler gives 11.5 Litres a minute (2 Showers) 30KW Combi Boiler gives 14.5 Litres a minute (2.4 Showers) 42KW Combi Boiler gives 20 Litres a minute (3 Showers)
Combi Boiler – Hot Water Boost The WRight Choice micro booster is the only pump on the market that can boost the pressure on the hot side of a combi boiler – you must not boost more than the maximum number of showers determined by your boiler. The WRight Choice micro booster cannot create hot water but it can take enough hot water to create the prefect shower. A good shower needs enough water to wash away the suds and enough pressure to give a nice forceful spray pattern. We aim to give 6 litres a minute and a minimum of 3 metres head to achieve this. The maximum flow from a Combi Boiler is determined by its KW rating and in winter because the water is colder the output is less: 24KW Combi Boiler gives 11.5 Litres a minute (2 Showers) 30KW Combi Boiler gives 14.5 Litres a minute (2.4 Showers) 42KW Combi Boiler gives 20 Litres a minute (3 Showers) You can protect an boost showers or taps in your home up to the maximum capacity of your combi boiler. When others open taps in your home, provided you do not exceed the output of your boiler, the shower you protect will continue to flow strong and good.
Combi Boiler – Inlet Pressure Boost
COMBI BOILER WHOLE HOUSE SOLUTION
A WRight Choice micro booster on the cold inlet of a combi boiler will help protect your boiler even if someone turns another tap on in your house or if your neighbours share a service to your house. Combi Boilers are designed to switch off if the pressure falls so if you are in a house and someone turns on a tap you might just end up with your hot shower becoming a cold shower. To maximise the benefit of the pressure boost we normally recommend a double boost, a second pump can be bought for less than half the cost of the first pump. The maximum flow from a Combi Boiler is determined by its KW rating and in winter because the water is colder the output is less: 24KW Combi Boiler gives 11.5 Litres a minute – 2 Showers 30KW Combi Boiler gives 14.5 Litres a minute – 2.4 Showers 42KW Combi Boiler gives 20 Litres a minute – 3 Showers You can stop your boiler cutting out and boost a single shower or taps in your home up to the maximum capacity of your micro booster. When others open taps in your home, provided you do not exceed the output of the micro booster (6 litres a minute for a shower and 8 litres for a tap) the Combi Boiler will continue to heat this water.
