Enduring, ageless, classic. Our bare metal finishes stand the test of time.
Unique to Castrads, you won’t find these finishes anywhere else.
Arouse creativity. Innovative finishes that intrigue and inspire.
Custom colours from the craftsmen of paint.
Eco-friendly paint full of definition & character.
At-home and virtual surveys enable us to give uniquely tailored design and tech advice.
Product showcases and behind-the-scenes shorts.
View the photos that our customers have shared on Instagram.
Including radiator assembly, delivery guides and pre-installation tips.
Help on getting the thread size right when replacing parts.
Home / Spares & Accessories / Plugs & End Caps
Plugs for renovation of reclaimed cast iron radiators and to use on new ones too. Read about BSP sizes here.Black iron plugs are tapered so that the seal is made on the threads. Our cast iron and steel plugs tend to have parallel threads and require a gasket to make a seal.
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