Hi all,
I'm considering replacing our old manual bypass valve with an automatic one.
Is it possible to do this without draining the system?
We've just had a new boiler fitted and inhibitor added so I'd rather not drain it unless I have to.
Please see photo. If I close the zone valves, the pump out valve and the hot water return valve, would this isolate the bypass valve so I can cut out and replace it? Or would there still be some pressure?
Also would it make sense to replace the 15mm bypass pipework with 22mm? We get a fair bit of flow noise on pump overrun so I'm hoping swapping for 22mm with the automatic bypass would solve this?
Thanks in advance,
Rob
I'm considering replacing our old manual bypass valve with an automatic one.
Is it possible to do this without draining the system?
We've just had a new boiler fitted and inhibitor added so I'd rather not drain it unless I have to.
Please see photo. If I close the zone valves, the pump out valve and the hot water return valve, would this isolate the bypass valve so I can cut out and replace it? Or would there still be some pressure?
Also would it make sense to replace the 15mm bypass pipework with 22mm? We get a fair bit of flow noise on pump overrun so I'm hoping swapping for 22mm with the automatic bypass would solve this?
Thanks in advance,
Rob