2″ BSP Female – This is a simple screw in green polypropylene cap that screws into the of 2″ BSP female threaded vent pipes on oil storage tanks. The temperature inside a tank can change due to the weather and different seasons, as a result the inside of the tank expands and contracts. Installing a vent cap allows the tank to breathe safely without damaging the inside of the tank.

2″ BSP Male – This is a simple push-fit green polypropylene cap that slips onto the top of 2″ BSP male threaded vent pipes and then secured with two screws. Designed for above-ground heating oil storage tanks, their main function is to prevent everyday particles/debris from entering the tank and contaminating the fuel inside.