Replacement Radiator Caps

RADCAPS UK is the No.1 replacement radiator caps supplier in the UK. The RADCAP is most universal and cost effective replacement radiator cap available on the market and has been sold to over 30,000 homes.

Radiator Caps

Our replacement radiator caps will fit on a valve spindle up to 8mm x 5mm and also maintain valve functionality. Before ordering please measure and check you have a standard valve/spindle, more information is available on our fitting page. If you're still unsure why not contact us and send a photo and the dimensions of your valve.