Nut In Elbow Water Tank Fitting For 40mm ID Hose 

Fresh Waste Inlet/Outlet Caravan, Camper, Motorhome

40mm OD Elbow Black Plastic "Nut In" Water Tank Fitting

for use on caravans, motorhomes, horseboxes, boat and even garden water butts all food grade plastic comes with washer and nut for secure and watertight mounting.

1 1/4" BSP Thread. 40mm OD Hose Barb