How long do honeywell two port motorised valves last?

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Discuss How long do honeywell two port motorised valves last? in the USA Plumbers Advice area at PlumbersForums.net

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Ed_R

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Ours are lasting between a year and two years and then I have to replace. Is this normal or should I be investigating our central heating system to find out why?

Which motorised valves do you recommend I use?
 
EvilDrPorkChop said:
They're really dodgy at the minute tbh, i'm hardly having them last. Anywhere between 2 and 5 years and they're going pop.

Started using Drayton instead where I can.
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Thanks. The system is free of sludge - I had all that done. The latest one the cogs were slipping, so the motor was fine.

I believe we do have an auto bypass - but this particular problem (resulting in changing the valve) started with the pressure going to zero. I repressurised the system and was left with an intermittent problem with the valve. I do hear kettling from time to time and I would like to understand Shaun's question better.

Another thought that I have is that I use the honeywell evosystem (which I like a lot). I wondered whether valves get more use and therefore deteriorate faster as the valve turns on and off as successive rooms demand heat.
 
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Yes especially if you have pump overrun as the pump will be pushing against the valve and wearing the gears more / forcing it open
 
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