15mm with a 10mm Reducing kit included. (10mm Reducing Kit). Simple Installation. Adjustable Tail Piece.
Corner Angled Thermostatic Radiator Valve & Lockshield Chrome 15mm TRV Pack TC
10 x Center 15mm Straight TRV Thermostatic Radiator Valve White/Chrome
Drayton TRV4 15mm Straight Thermostatic Radiator Valve White & Chrome
Quick Release . TRV Thermostatic Radiator Valve White/Chrome
TC Angled Thermostatic Radiator Valve TRV & Lockshield 15mm x 1/2" Drayton TRV4 Style Chrome White Angle Pack EM
Corner Angled Thermostatic Radiator Valve with Lockshield Valve TRV Chrome White 15mm Pack Set
