Capped terminal line by water heater
Does anyone know what that black plastic nut is circled on the photo? It is located inside my water heater compartment, and is plumbed in right near the WH bypass. I've had some issues with water slowly leaking out of there, something that I can stop by re-tightening the nut by hand. Is there any way to prevent this from continuing to happen? It's just such a pain to reach in there and tighten. We've got a 2012 Stealth Evo.