DIY ONE-WAY VALVE INSTALLATION TECHNICAL
A caravan typically has two water supplies. 1) Water is drawn from an onboard tank and fed by a 12V pump, or 2) Water is fed by mains water such as when you connect up at a caravan park. Therefore, there is an inlet where you put water into the tanks and another inlet where you connect directly into the van plumbing. Both water supplies run into a common plumbing system
