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Appreciate the response and advise. Think the census of opinion from others is the same,no way it could enter the pipework.. Which must mean it was never there in the first place..odd.. But I'll accept that now following feedback.

V4073a 1039

Tbh, my thoughts were that the ball had split into 2 or more and gone down the 22mm bore possibly lodging at the 15mm reducers. But if it never had a ball ( seemed unlikely to me) then I am baffled. Think the flush is my only way forward, so will look to get it done now winter is over. Think the...

Thank you for the input and advice. I'll try and look up someonw that can investigate further.

Honeywell v4073a Gravity feed vented system with vitodens 100 boiler. It was shortly after we moved into the house that the incident happened when the motorised head was replaced asking with the valve. It's been something I've lived with as the system works but albeit sometimes can take ages...

Nope, not sure... Which doesn't sort of make any sense but happy to take the input from the experts... Was trying to find out if it was something others had experienced too... And hoping it was as then it would explain my symptoms on inconsistent heat up times

When it was last replaced a few years ago there was no rubber ball on the valve. Disney think anything of it at the time but over the years it's always been either working well or takes an age to warm up the radiators, often having to shut some radiators down... Which I thought means it's...

Has anyone experienced the rubber stopper break up and go awol down the pipes from a 3 way valve. Got this issue and unsure as to how to go about getting someone to look at fixing it. Heating works but rarely heats up as quick as it should and I'm sure the blockage is causing the problem. Is it...