"If you have 15mm bath or shower inets this product is great. The usual shut offs have a much smaller bore but this allows maximum flow without restriction. Allows the water to be isolated where you want without affecting the remainder of the house. Great for me when doing full refits. One of the valves leaked from the screwdriver slot where it turns but it was replaced without problem."
"For anyone who has used an isolation valve on a gravity fed shower then make sure you fit these full bore ones rather than the standard type. The difference in flow is amazing and makes for happy shower users without complaints of "low rate dribble showers". OK they cost a bit more but where non-mains pressure is concerned every drop of available pressure counts."
"I'm not sure that there's a lot of benefit when installing full bore isolating valves over the 'standard' smaller bore variety when on mains water pressure, but as I was installing two showers I thought I'd give them a go.
They seem well made and look like they should be reliable but, like others, I found that the isolating screw head is somewhat hard to turn. Apart from that they are OK and a where decent price from Screwfix."
"This valve is significantly larger than the narrow bore valve both in length and diameter. Overall length (without caps on) is 55.5 mm and the diameter of widest part is 28.5 mm. There is no obvious direction of flow with this valve so I guess it can be fitted either way around. The valve is quite stiff and the slot shallow so you need a good fitting screwdriver if you are not to damage the slot.
The body of the valve has a handy octagon on the body so you can use a 24mm spanner on it if you need to tighten or slacken just one end and hold the body steady. The end caps need a 23mm spanner"
"This isolator was very stiff to adjust at first but after easing it works exactly as you'd expect. Being full bore it allows better flow on HW lines. It is larger than the standard isolator but easy to fit. Quite expensive compared to standard but usefull when there is lower pressure in lines."