"Just like the other reviewer, once disturbed the valves just wouldn't stop leaking. I too had to drain down system. Also, the large nut was so stiff I had to cut through the valve to remove it. An hour job has taken 4 hours and counting. To be fair, the valves are quite old, but they shouldn't fail on first use and impose so much work. Tried the Peglers, but they are slightly longer and won't fit in the gap. Very reluctantly will have to buy a pair of these again as I think they are the right length. By the way, it would be useful if the full dimensions were stated in the website for all such products, as I often find I need to know it."
"I fitted these 4 years ago when I fitted a new pump. Recently the pump made some noise when in operation that could be heard around the radiators. As I went to isolate the pump the little grub screw thingy started to hemorrhage water as I made the 1/4 turn to isolate. When I put it back into full operation it still leaked water. In the end I had to drain down the heating system to get the pump out - makes the isolating valves a waste of time. I'm off down to screwfix now to get the Peglar Pump Valves; I still prefer ball over gate. I live in a very hard water area and that may affect the life time of the valves - but it is the first time I've used them since new!."
"As per previous posts I've just had a leak from the valve when isolating the pump, and the valve has only be installed for two weeks. It only leaked a small amount and soon stopped, but that doesn't bode well for the future. And even worse, when turning the valve with a wide bladed screwdriver, one lug of the screw sheared off. I'm replacing them with a pair of pegler valves."
"These valves leak from the grub screw and let in air to the central heating system. The are also very difficult to fit without leaking from the main nut. I am now removing mine to fit better quality. They are very cheap in price so its possibly to be expected. Buy cheap buy twice and all that"
"Fitted these just over a year ago and i have recently discovered that one of them is leaking fron around the valve stem. They have only been turned on and off once when fitted, so its not even like they have worn!"
"Had a pair of these isolation values in situ for about 5yrs when the pump failed. I was just about able to shut off the values but after replacing the pump trying to open the values one stem broke in two and water started leaking out. There's a fundamental design flaw in the way these are constructed in that to turn the value you need to put pressure on the slot, which causes it stress fracture.
Don't be fooled by the cheap price, it's not worth the hassle of having to drain down the system to replace them, what should have been a 30mins turned into a 3h job... go for the peglars"