I've removed a couple of radiators, and they are 3/4inch BSP fittings; I know this is correct as that's the blanking caps I used. I want to replace the valves when I refit them, and the thought it sensible to use trv's. I thought they came with suitable tails (think that's the correct term) but the ones I've picked up from screwfix don't. I'm now struggling to find ones that specify that they can be used with 3/4 BSP radiator's that aren't really really expensive. Have I got any other options, some kind of adapers that won't mess up the valve spacing or something? Be gentle with me, I'm a total plumbing newbie!