HoneywellV4043H 1056 2 Port Zone Valve Normally Closed 22mm

Good price and genuine product

This review isn't so much for the valve more about the process of swapping it over.We had a faulty valve swapped by an engineer a couple of years ago and paid over £100 for the privilege. But the new valve has started to make a knocking noise when going to closed position, closer inspection shows that the teeth on the gears are worn and in some cases broken. I didn't want to spend another £100 plus, so thought I'd have a go doing it myself. (I'm not convinced this engineer install a brand new valve, but that's another story).I watched a few Youtube videos and confirmed that this model does not require draining of the system so long as you're just replacing the "Powerhead", which is the silver metal box. This detaches from the brass pipe section really easily. I also waited for the weather to warm up a little, I didn't want to risk breaking the heating and having to wait for an engineer to arrive in freezing temperatures.Once you've swapped the powerhead, the 5 wires just need swapping over in the junction box. Fiddly but still easy. Just make sure you take lots of pictures and video before you disconnect anything. Oh, and switch off the electricity too, obviously! I used a meter to double check there was no power.My heating system and wires are a mess (inherited with the house), but it was still a fairly simple swap.20 mins later I switched it all back on and tested. All working perfectly plus there's the bonus sense of satisfaction of a job well done!

Good value

Genuine Honeywell part was delivered within 24 hrs. They are worth paying for, the cheaper copies are a false economy, in my opinion.My central heating stopped working & the cause was the Honeywell valve for the central heating loop. It was probably as old as the house (~50 yrs), so can't complain - it's not had any parts replaced either!I looked into keeping the valve (the brass part) & just replacing the actuator (metal box), but it was such an old model, this didn't seem worth it. On the old models you can't replace the actuator without draining down the system, with the new ones (like this one) you can. So if you have an old one, I'd replace the whole thing if it dies.Apparently you can get apator kits to fit new actuators to old valves, but really don't waste your money, just replace both parts (with this part). The valve will get gummed up over time anyway, so it does need replacing from time to time.When I ordered, the complete unit was actually cheaper (by about 10%) than buying just the actuator & I fitted it myself, so it was a no-brainer for me to replace the entire unit.Look between the metal box & the brass valve, if you can see a thin layer of red, this is the sealing gasket - and means you have an old style unit - so order this part & replace the whole thing - the wiring, colour of the wires & action is identical.If you have previously replaced just the actuator becuase it has stopped working, becuase it had ground down its gears, this means the value is getting clogged up with gunk - so I'd say you need to replace both (using this part) - if you just replace the actuator again you're just wasting your money & causing yourself headaches.The gears are made of brass as a fail-safe so, if the valve action starts to seize, the gears will grind down, instead of the motor burning out, which could be a fire hazard.To fit this part, shut off the water to the C/H, drain enough water to allow you to remove the failed valve & replace it with this part. Make sure the arrow points in the same direction as the old one (away from the pump). If in doubt search youtube or call a c/h engineer.My top tip is - if you put a tub under the valve, then loosen one of the retaining nuts enough to cause it to dip, you can then tell if you have drained the system enough, cos the dripping will stop - it also allows water to drain out of that pipe quicker as it allows air in. Often you will not have to drain down too much, as the valves are near the top of the system.

Quick delivery. Quality part - all fitted perfectly.

Working very well so far, let's see how long it will last,

Value for money, cheaper on Amazon than local shops

Last year my central heating had to be persuaded to work because the heating zone valve was not working properly (pump would not start for example), but after using the manual lever a few times it started working. This year could not get it to start at all, had to resort to putting the hot water on (setting temperature higher than normal) to get the pump running (valve was open). So bought this complete valve in case it was the valve itself. It seems it was a combination of the gears and microswitch in the head, so took the head off (cover off, two screws to remove), checked that the valve could be manually operated using the shaft, fitted the head of this valve. The hardest part was wiring the new valve into the junction box. This was slightly confusing as the brown wire was a very odd colour (the earth was also a solid green rather than green and yellow) so had to confirm the wire by elimination. Did it one wire at a time with the old one still in place, take old wire out, put new wire in making sure other wires did not come loose.The system now works correctly.This part was cheaper than just buying the head from Screwfix and much cheaper than buying a complete valve.. It arrived promptly having been dispatched on a Sunday from the seller.Very happy with purchase and seller