Compare 2 prices for Drayton TRV4 15mm x 1/2" White/Chrome Angled Designer Thermostatic Radiator Valve & Lockshield — from £32.08 to £37.69 across 2 UK sellers including Toolstation, Screwfix. Save up to £5.61 (15%).
Easy to fit but found that settings recommended on product did not suit my system. This maybe because I have not fitted them on all the radiators as suggested
Bought to replace the heads thinking that the heads were the self balancing bit DOH . Would of been aswell to have just bought the £19.98 heads wasn't very well explained in the advert only once I got the box did I realise . Just needed to screw the heads to max then screw onto existing valves brother-in-law managed that ok .
Looking forwards to seeing how this product performs over winter, and might fit to other rads on the system if successful in curing the slow performance of a hall radiator which is not in balance. If it works as described, a great innovation in design from a leading brand. You do need to set it up with the instructions by moving some pegs under the Head for your radiator output in Watts/BTUs.