Noisy Booster Pump
If your pump starts making an unusual humming sound, this could be a sign of something more serious. If this happens it could be a warning that the booster pump has become jammed and that the impellers are not rotating. This could be because you’re in a hard water area and not using it often enough and limescale is accumulating inside it. It could also be as a result of the seals becoming stuck or there might be an electrical problem. In this case, you should call a qualified engineer to service the pump.
Sometimes pumps become noisier over time. When this happens, the problem could either be from the way that the booster pump is sited or something to do with the pipework. Ensure that the pump is fitted with anti-vibration feet and make sure that all the pipework that supplies it and is within 3ft (900mm) of it is properly supported.
Likewise, ensure that there is sufficient water – both hot and cold – to supply the pump. If there is not, the pump may make a straining sound and you could be shortening its life. Ensure that all valves supplying the pump and those on the other side of it are open to the manufacturer’s specifications.
It’s common sense but sometimes overlooked, particularly as our winters seem to be getting colder again, but you must ensure that your booster pump is protected from freezing. The cold feed pipe from the cold tank must be lagged to prevent ice causing bursts or damage to the booster pump.
Booster pump leaks
Should you notice a leak from your booster pump you should turn off the isolating valves on both the feed and delivery sides. It is possible for the seals to deteriorate over time and they can be replaced. Call a service engineer to rectify the problem.
Other booster pump problems
If your booster pump stops working, don’t automatically assume that it’s a problem with the pump. Check the electrical supply – most pump failures are caused by nothing more complicated than a blown fuse.
If the pump continues to run after you’ve turned off the mixer or taps, check that there isn’t a leak in the pipework from the delivery end of the pump to the shower.
Should your booster pump start pulsing and delivering water to the shower in bursts, other taps in the house may be causing it to malfunction and there could be a problem with your pipework. Call an engineer to rectify the problem.
Finally, make sure that the water temperature from the hot water cylinder does not exceed 60C. Water that is excessively hot can cause damage to the pump during prolonged use, draw air into the system and invalidate its warranty.
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