Air Supply Valves

Metal air supply valves deliver fresh air into a room from ceiling- or wall-mounted duct terminations. Made from galvanised steel with a white powder-coated finish, they are durable, easy to wipe clean and discreet in both domestic and commercial settings — homes, workplaces and public washrooms alike. Fitted at the end of a rigid or flexible duct run, a supply valve gives a neat, purpose-made termination instead of an open duct end.

We stock five sizes to suit standard round ducting: 100mm, 125mm, 150mm, 160mm and 200mm, matching the most common supply duct diameters. Order by 3pm for next-day delivery, with free UK mainland delivery on orders over £400 ex VAT.

Pair them with our air extract valves on the extract side of the system, or specify the fire-rated version where an intumescent, self-closing valve is required. The Terlok Ring Leader fixing ring makes fitting any of our air valves quicker and neater.