Here is the York compressor that came with Piggy. We used NPT brass fittings from our local hardware store to connect the outlet of the compressor to the stainless steel braided leader hose labeled A (PN VAR- 92793). The leader is then connected to B, the one way check valve (PN VAR-92831). This fills one of the ports in C, the four-way fitting (PN VAR-92855). This fitting is plugged with the pressure safety valve, D (PN VAR-92205), the pressure switch, E (PN VAR-90102), and a few feet of locally sourced high-temp high-pressure rubber air line that is then tied into one of the 1⁄4-inch 18 tpi to 1⁄2-inch push-to-connect fittings that came in the 1⁄2-inch push to connect air hose and fitting kit (not shown). Then Summit Racing 1⁄2-inch Puvex hose runs to the water/air separator and then the tank.