"Really useful item, These elbows enable you to use a budget (15mm) TRV and lock-shield pair but then connect to 10mm plastic piping from behind the radiator. Makes a neat job. Only thing missing is that the description on the Screwfix website doesn't say that they are "15mm stem to 10mm pushfit" elbows, I had to glean that information from another review. Will definitely use again."
"This allows the plastic 10mm pipes to come out of the wall behind a radiator and dive directly into the valve. Combined with a manifold this allows all the radiators on a single floor to be installed in a few hours."
"The spigot fits a standard 15mm radiator valve so effectively it converts the valve to a 10mm valve. Makes a neat job as you can have 10mm plastic pipe coming out of the wall directly into this chrome fitting"
"Purchased 8 of these fittings. Fitted to new radiator valves with inserts. Ran system, one fitting failed next day. Renewed, then another failed next day. Leaked at pushfit shoulder seal on both fittings.Hassle twice."