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...but it worked brilliantly. I had a defective TRV to change and didn't want to drain the system with the attendant cost of replenishing the Fernox additive. For about the same price I saved the bother of the drain down and now have the tools to allow me to do the same job over and over, as needed. With the feed pipe bunged off I took the opportunity to fit a serviceman valve so only need to bung the overflow pipe next time. I also fitted a new AAV while the system was 'suspended' and no drips whatsoever. There was a slight loss of water, about a teacupful, as I swapped out the rad tail for the new valve but considering I didn't drain the radiator as the instructions say you should, I was well pleased. Excellent bit of kit if a little pricey.
Verified purchase: Yes | Condition: New
great product saves hours of work had 3 old TRVs that would not switch off and radiators needed to be removed for decorating [no decorators caps] this product saved me draining down and was able to remove radiators and replace valves much better quality and more reliable than the cheaper hard rubber variety
Verified purchase: Yes | Condition: New
brillant for the purpose it is designed for and also as a bung on cold water tanks saves draining the tank when working on the feed side.
Verified purchase: Yes | Condition: New
Excellent, easy to use . Saves hours draining and refilling central heating system .
Verified purchase: Yes | Condition: New
The best I've ever had. Gives me confidence to do the job and know water won't be leaking.
Verified purchase: Yes | Condition: New