Clarke ½” BSP Non Return Valve Description A non-return valve for use in airlines. £19.51 In stock Clarke ½" BSP Non Return Valve quantity Add to basket EAN: N/A SKU: 2002198 Category: Accessories & Consumables Related products Clarke Airline Oil 1 Litre £13.81 Clarke AVM C300 Anti-Vibration Mountings (Pk 4) £30.52 Clarke Pressure Switch 4 Port 20 Amp 1 Phase £23.32 Clarke Pressure Switch 4-6 amp £75.20