Danfoss Radiator Valves

Match the valve connection size to the outside diameter of your heating pipework – the range here shows 10mm and 15mm options, with most valves available in 15mm. 15mm is the common size for standard central‑heating radiators; 10mm is often used on smaller towel rails or compact systems. If you measure the copper pipe and it is 15mm, buy a 15mm valve; if it is clearly slimmer, choose 10mm to ensure a leak‑free fit.

Use straight valves when the pipe runs along the wall to a side inlet or comes up from the floor to a bottom inlet. Choose angled valves for side inlet radiators with pipework coming from below, or for bottom inlet radiators where the pipe comes through the wall. Corner valves are for situations where the pipe runs along the wall to a side inlet or along the wall behind a bottom inlet; picture floor pipework coming up centrally — you would usually pick a straight 15mm valve.

A pack with a lockshield gives you both the thermostatic valve and the balancing lockshield in one purchase, and five of the listings include a lockshield while six do not. If you are replacing both ends of a radiator or fitting a new radiator, a pack saves you matching parts and ensures consistent finish and sizes. If your existing lockshield is serviceable and you only need the thermostatic head, a single valve can be sufficient and more economical.

The RAS‑C2 line appears chiefly in white and at lower price points, making it a good match for painted radiators or when you want a discreet look. The RAS‑D2 models include chrome finishes and some higher‑spec pack options, so choose D2 if you want a polished, matching metal finish or a premium aesthetic. Both ranges are thermostatic, so pick C2 for budget and subtle styling, D2 for chrome coordination and a slightly more premium feel.

White valves (the majority of options) blend into white or painted radiators and create a minimal, unobtrusive look for bathrooms and kitchens. Chrome valves (fewer listings) give a reflective, contemporary finish that ties in well with chrome taps, towel rails and fixtures. For example, if you have a chrome towel radiator or polished taps, a chrome RAS‑D2 will harmonise; for a white column radiator in a neutral bathroom, a white RAS‑C2 will sit less visibly.