"I always fit an isolation valve to electric showers and every piece of pipework at - say sinks and cisterns - because it saves a lot of time by not having to locate the stopcock and partially draining the system. NOTE these valves are for use on water pipes only. Gas isolation valves are plentiful but do not be tempted to fit them if you are not in the trade, get a plumber, expensive but essential for safety !!!"
"Just not possible to get better value for money these should be bought as these save so much time when replacing water taps etc when you can isolate water supply easily a must have product will last a life time."
"Very good price and a good quality product. In the middle of fitting a new bathroom so have just used three of these and all sealed perfectly at the moment. The test will come 10 years down the road when things need replacing."