I have a Stuart Turner U2.0 bar Single pump fitted to boost my hot water. It's about 10 years old but it's had the same problem from day 1 & ST aren't very helpful so I wonder if someone can advise.
Every hour or two, it bursts into life for a few seconds & then switches off.
I have hot water in a tank & an expansion tank in the roofspace. The HW tank takeoff is the one needed to avoid bubbles entering the system.
ST said I must have a leak as it's trying to pressurise the system. After searching everywhere for a leak or dripping tap, I told them there wasn't a leak. They sent me a new pressure cylinder (screws onto the top) but it made no difference. They then insisted I employ a plumber to write a report confirming there's no leak, which I did (at cost to me). They then sent an engineer to replace the pump.
Since then I've had the same problem. I fix it by removing the pressure cylinder (which is full of water) & fitting the spare one. I drain the full one & wait a couple of months for the issue to reoccur & repeat the temporary repair process. Neither cylinder can be pumped up at all (they need some pressure apparently).
I'm sure the issue is because the pressure cylinder can't be pressurised, but why do both cylinders behave like this? BTW I've tried several pumps.
Any suggestions please?
Every hour or two, it bursts into life for a few seconds & then switches off.
I have hot water in a tank & an expansion tank in the roofspace. The HW tank takeoff is the one needed to avoid bubbles entering the system.
ST said I must have a leak as it's trying to pressurise the system. After searching everywhere for a leak or dripping tap, I told them there wasn't a leak. They sent me a new pressure cylinder (screws onto the top) but it made no difference. They then insisted I employ a plumber to write a report confirming there's no leak, which I did (at cost to me). They then sent an engineer to replace the pump.
Since then I've had the same problem. I fix it by removing the pressure cylinder (which is full of water) & fitting the spare one. I drain the full one & wait a couple of months for the issue to reoccur & repeat the temporary repair process. Neither cylinder can be pumped up at all (they need some pressure apparently).
I'm sure the issue is because the pressure cylinder can't be pressurised, but why do both cylinders behave like this? BTW I've tried several pumps.
Any suggestions please?