Hi there,
I recently replaced a dead central heating pump in my home, so drained down the system completely, fitted new pump and filled up. What I'm experiencing now is a periodic bubbling noise, it starts in the hot water cylinder and makes its way to the boiler which in turn starts making gulping noises and then onto the pump which makes a high pitched noise.
So it sounds like air in the system but I would have expected this air to make it's way from the pump through the radiators and I'd be able to bleed from there? All the radiators have no air in them.
So then I decided to turn off the flow valve to the HWC coil and what do you know the bubbling noise completely disappears.
My system is an open system from what I can determine, I have two tanks in the attic, a small one for the CH and the larger cold water tank. Neither tank has a return pipe but the CH tank has a T-Junction, one side feeds the system and the other side leads to an expansion vessel which I thought was used in closed systems.
Also to add I believe this issue was possibly occurring before I replaced the pump and may have been the cause of the original pump dying.
Any ideas? Thanks!
I recently replaced a dead central heating pump in my home, so drained down the system completely, fitted new pump and filled up. What I'm experiencing now is a periodic bubbling noise, it starts in the hot water cylinder and makes its way to the boiler which in turn starts making gulping noises and then onto the pump which makes a high pitched noise.
So it sounds like air in the system but I would have expected this air to make it's way from the pump through the radiators and I'd be able to bleed from there? All the radiators have no air in them.
So then I decided to turn off the flow valve to the HWC coil and what do you know the bubbling noise completely disappears.
My system is an open system from what I can determine, I have two tanks in the attic, a small one for the CH and the larger cold water tank. Neither tank has a return pipe but the CH tank has a T-Junction, one side feeds the system and the other side leads to an expansion vessel which I thought was used in closed systems.
Also to add I believe this issue was possibly occurring before I replaced the pump and may have been the cause of the original pump dying.
Any ideas? Thanks!
