I have a few of these installed to zone off an extension and to trigger circulation to a pressurised water cylinder.Recently the hot water valve actuator wasn’t closing when demand ended. This means the pump runs endlessly and hot water is forever produced based on thermostat demand. It always returned when given a little jiggle but obviously not a practical solution.So.. with these units the head is easily replaceable. This came with the 2 port as well but was a good price compared to regular retail outlets.Wiring was super simple assuming appropriate skills. I’m handy but definitely not an electrician. For me this was simply replacing wiring like for like (see pic). BUT ISOLATE THE SUPPLY FIRST AND CHECK!!!All done in about 20 minutes. First time for me too. Once tested a few times really happy that compared to a plumber call out this was a simply job at low cost! Boom

After our boiler heating and hot water system service provider tried twice to fix the pump running problem when heating and hot water switched off without success (first visit i as told it was a faulty pump, second visit i was told it was the hot water cylinder thermostat) I decided that I may as well work out the problem myself. After reading reviews here on Amazon and also via plumber Google, I fund others mentioning the same symptoms for their system for the same boiler as mine and it was dead right, basically the heating valve actuator microswitch had failed when the airing cupboard had become warm (eg after 5 hours of heating.)This was a direct replacement unit and works a dream.Why the service company, a BIG Well known one, didn’t think of this is beyond me. Anyway, all done, great it’s, good price, speedy same day Prime delivery, job done!

I didn't need to replace the valve part but it's cheaper to buy the whole gubbins rather than just the actuator which is what broke.These things are not the most reliable, but they are easy to fit and replace.The old one packed up because the post to which one of the return springs attach snapped off - poor design I think.They are, however, very easy to fit provided you isolate the electrics and carefully replicate the original wiring in the junction box. I'm not a tradesman so I wouldn't like to wire one in from scratch. Time to fit once diagnosed, about 30 minutes max.The new actuator just clips on to the existing valve.

Replaced one of the same ,just clip on and wire it in .simple.

The headline describes already the downside of this actuator. The Drayton actuators do not usually have a very long life. On the plus side they are notably less expensive and very easy replaced. And it is not so as if the big brand with the H would be flawless. The older units were great but the newer ones only have a higher price than the Drayton ones and are much more frequently a cause of trouble, opposed to the older units and barely better than the Drayton ones.That is the reason why this actuator gets a 5 star rating, which I would not have given a few years ago.The location, where this actuator is replacing the faulty one, is very crammed up. I would not really have fancied trying to fiddly unscrew and screw back an actuator, whilst trying to align the lever. The click fit of the Drayton actuator made that part of the job quick and easy. And allows for quick testing out of position if needed.