B
boaz
Good Morning Engineers,
I have a Worcester Greenstar open vented boiler, feeding rads and hot water system via a 3 port motorised valve. I live in a bungalow, and all pump/valve/control systems are in the roof - boiler down stairs. I need to replace the 3 port motorised valve, but do not want to drain down the system.
Question :- The header tank has a gate valve feeding the system, the open vent running into the top of said tank. If I closed the gate valve, and blanked off the vent pipe entry with a push on stop end, would this cause a vacuum in the pipework so that I could remove the 3 port valve without having to drain down?.
Any advice would be welcome,
Kind regards,
boaz.
I have a Worcester Greenstar open vented boiler, feeding rads and hot water system via a 3 port motorised valve. I live in a bungalow, and all pump/valve/control systems are in the roof - boiler down stairs. I need to replace the 3 port motorised valve, but do not want to drain down the system.
Question :- The header tank has a gate valve feeding the system, the open vent running into the top of said tank. If I closed the gate valve, and blanked off the vent pipe entry with a push on stop end, would this cause a vacuum in the pipework so that I could remove the 3 port valve without having to drain down?.
Any advice would be welcome,
Kind regards,
boaz.