Imagine a canister not dissimilar to a diver’s air tank - with an inlet and an outlet - which you connect in like with your hose pipe. Best to connect it at the opposite end to the tap to miPlease can somebody explain DI vessels?! I googled it but am still mystified... Being regularly frustrated by the difficulty of cleaning a black car (how many times do I have to go back over it with the drying cloth to catch all the little drips that sneak out of the light clusters and windows corners...? ) I’m interested to learn more!