I'm no plumbing expert by any stretch of the imagination but have a simple (i think?!) question about rad valves for any plumbers or heating experts out there. I am trying to replace my rad valves on some fairly large rads in a house I just bought. The valves themselves are quite old.
The feed pipes going into the valve are 15mm copper pipes but at the thread of the valve where it screws onto the rad, the size seems to be about 22mm or so. All the DIY shops I go to only seem to sell the rad valves at 15mm connections to the rad. I've been told this is the new British standard. Is it no longer possible to pick up valves with a 22mm (or thereabouts) thread to screw onto the rad?
2007-01-10 09:33:10 · 3 answers · asked by Anonymous in Home & Garden ➔ Maintenance & Repairs
The valve to radiator connection is normally 1/2" BSP, if your old radiators hhave bigger tappings, then they must be 3/4" BSP, so you need a 3/4" to 1/2" BSP male iron to female iron reducer (Bush) into the radiator first. Go to a plumbers merchant not a DIY shop.
2007-01-10 20:01:44 · answer #1 · answered by jayktee96 7 · 2⤊ 0⤋
If these are the only size valves you can find, then you have to fit a reducer fom 22mm to 15mm, then fit your rad valves into that. The fitting you want is a 22mm male iron to 15mm copper. but make sure that your valves are not 15mm before buying these. You may also have to buy a radiator valve key to fit one half of the new valves.into the radiator.
2007-01-10 10:10:40 · answer #2 · answered by Anonymous · 0⤊ 2⤋
take out the fitting in the radiator a screw in the new ones the nut is bigger but the new thread is the same size as the old ones
2007-01-14 08:45:35 · answer #3 · answered by mickthegas 2 · 0⤊ 1⤋