Abstract: The coupler is provided that has two ends or openings. On one end, the coupler is adapted for receiving a stainless steel pipe. The stainless steel pipe fits inside or into one end of the coupler and is securely and tightly held inside the coupler by a snap lock. An O-ring rests against the end of the stainless steel pipe and forms a seal when the stainless steel pipe is inserted into the coupler. On the other end, the coupler is adapted for receiving a plastic or PVC pipe. The plastic pipe fits inside a recessed opening of the coupler, and is securely and tightly held inside the coupler by a clamp lock or by glue. An O-ring rests against the end of the plastic pipe and forms a seal when the plastic pipe is inserted into the coupler.