Have searched around trying to find the answer to this but seems plumbing noises are many and various and hard to be sure about!
We've got an oil-fired boiler and recently had the traditional hot water cylinder and cold tank replaced with one of these unvented mains pressure systems. It's a megaflo type setup (GAH Dualstream) with an 'accumulator' in the loft which as I understand it stores water at mains pressure (deemed necessary as we have a small bore mains supply pipe to the house).
Since we've had this new setup, we've been getting a loud noise sometimes when running a hot tap. The noise isn't a hammering or banging so much as a long 'bassoon' type sound that varies in pitch as it sounds. If you leave the tap on, the noise dies away after a few seconds.
It happens on every hot tap in the house, but only intermittently - i.e. at least once a day, on at least one of the taps, but most times you use the tap there's no noise. It's most likely to happen first thing in the morning.
So far it's never happened when the plumber's here, which is pretty frustrating - he's installed the system and is currently installing our new bathroom so he's here quite a bit but hasn't yet identified or fixed the problem, so it would be great if someone could point me to a likely cause!
We've got an oil-fired boiler and recently had the traditional hot water cylinder and cold tank replaced with one of these unvented mains pressure systems. It's a megaflo type setup (GAH Dualstream) with an 'accumulator' in the loft which as I understand it stores water at mains pressure (deemed necessary as we have a small bore mains supply pipe to the house).
Since we've had this new setup, we've been getting a loud noise sometimes when running a hot tap. The noise isn't a hammering or banging so much as a long 'bassoon' type sound that varies in pitch as it sounds. If you leave the tap on, the noise dies away after a few seconds.
It happens on every hot tap in the house, but only intermittently - i.e. at least once a day, on at least one of the taps, but most times you use the tap there's no noise. It's most likely to happen first thing in the morning.
So far it's never happened when the plumber's here, which is pretty frustrating - he's installed the system and is currently installing our new bathroom so he's here quite a bit but hasn't yet identified or fixed the problem, so it would be great if someone could point me to a likely cause!