VSFZ DZR Stopcock FxF Manufactured to BS 1010 Parallel threaded ends to ISO 228 Resists corrosion by dezincification This stopcock comes in several variations in this section 1" VSFZ DZR Stopcock FxF 1 1/4" VSFZ DZR Stopcock FxF 1 1/2" VSFZ DZR Stopcock FxF 2" VSFZ DZR Stopcock FxF   - IMPORTANT NOTE, MOST PLUMBING PRODUCTS ARE STATED AS BSP IMPERIAL THREAD MEASUREMENT WHICH MEANS THAT ACTUAL DIAMETER OF THE THREAD SIZE IS APPROXIMATELY 1/4 INCH LARGER THAN THAT STATED IN BSP TERMS. FOR EXAMPLE THIS 1 1/2 INCH BSP THREAD ACTUALLY MEASURES APPROXIMATELY 1 3/4 INCH IN DIAMETER