This modular caravan and RV tank is blow moulded from food contact approved, high molecular weight, high density polyethylene.This makes the tank a super touch performer. Moulded with two integral 20mm (3/4 MBSP) threads that can accept a wide variety of standard fixtures and fittings.Using these standard fittings, the tanks can be networked together to provide almost limitless water storage options for your vehicle.Fittings not included