"I bought a pair of these valves to replace a couple of standard isolation valves after finding out that one wasn't shutting off at all and the other one was letting by.
When I went to fit them I thought it would be a lot more straight forward than what it was by just taking out the old valve, use the existing nut and olive and just replace the body, but found that the collar depth is shorter than that on what I would call a conventional run of the mill solation valve, so be prepared in having to remove the old olive and nut if you're replacing an existing valve. Once fitted they seal really well even under pressure of the combi boilers hot water supply and with the full bore opening improves the flow of water through the tap. On the whole the valve has an excellent build quality, install is fairly straight forward and will definitely convert to using full bore valves in the future."
"I used a pair of these valves to plumb in a booster pump for my hot water system. They seal so well that I have been able to use them to isolate the hot system instead of relying on the old gate valve, which these days would let a double decker bus through.
Most important:The full bore design does not hinder the water flow too and from the pump, which is essential.
# Quality is excellent.
# Fitting is a piece of cake.
# I can't comment on the reliability, they have only been installed a month, but I think they should be very reliable give the build quality."
"Although more expensive than normal isolating valves these are well worth using so as not to reduce the pipe diameter on long runs or where multiple appliances are connected. Particularly useful for isolating larger central heating systems into zones so as to avoid draining whole system down."
"Product is great and works as it should. Biggest disappointment was only one in stock ! This items is more commonly required in pairs and to find one in stock meant a second trip to another store. Common sense...minimum stock level 2 !!!"
"Fitted quite a few of these, no problems (yet !). Full bore means no restrictions being added, at this point, to the pipework, never mind what other changes to ID occur elsewhere. Like all 22mm compression, better/easier/more reliable to seal with loctite 55 than PTFE. But maybe I've limp wrists."
"Before fitting I found the torque required to close the valve excessive, but thought it may reduce once broken away and with a pipe to help hold it. Fitted fine and no leaks. However breakaway torque required to open or close the valve is far too high, and the screwdriver flats are rounding out already - so fearful am I whether there is any chance of operating these in two years time with restricted access that I am stripping them out now and replacing them with a lever operated full bore valve. I suggest you go straight for one of those instead.
Pros: Full bore Easy fit with hex on body No leaking on first fit
Cons: Breakaway torque far too high so screwdriver flats already rounding out Need to be really precise to shut off flow"
"Fitted for 6 weeks now and seized so tight that the cross slots burred off when I tried to close them. The cross slots aren't very deep, but they are wide (you'll struggle to find a screwdriver blade thick enough to fill the slot#. I used a thick steel washer holding that with mole grips to shift them #both of them). The metal slot top screw head is so soft, it's next to useless. I'll try to cut deeper slots in the heads, but failing that - mole grips are the only way to turn them on / off. Very disappointed indeed - not the sort of quality level I'd expect from Screwfix ! Avoid them."
"Worked fine for 15 months but then had to use for the first time to isolate the hot and cold supply to a bathroom. As soon as the screw was turned they both started leaking through the screw hole. Had to drain down the entire system so they were were useless for the task for which they were bought. Given that other reviewers have reported similar problems Screwfix should stop selling. Have replaced with WRAS and British Gas approved full bore lever valves. Would have got top marks for value had they worked, but it's cost me a lot to replace them so they were a false economy."
"Installed one during renovation project. Ball seized after several months, tried soaking in penetration / lube oil - no good. Would not buy 22mm version again. Would not budge. Rubbish (15mm version installed alongside ok) - will try 22mm lever option instead"
"Fitted this valve, the ball siezed and would not turn in either direction, ended by being stabbed in the hand with the screwdriver...not pleased and very painfull. Will never buy one of these from Screwfix again."