I have a 650 Litre van-mountred tank. I am building a shed-based static RO system and intend to pump the water to the van. I bought some tranfer hose which has an internal diameter of around 30mm. What I'd like is to fit a connector that has a barbed outlet into the top of the tank so I can push the transfer hose onto this and then start filling the tank.
Does anyone know where I could obtain such a connector? I'd particularly like one that has a cap or something to stop water leaking out after use.