Originally Posted by ctbailey
That is probably a back flow preventer.
Whatever it is, it shouldn't leak.
No, it shouldn't leak, but many do. It seems to be a somewhat common problem, unfortunately.
Sherm & Terry w/rescues Steve (std Poodle) & Eydie (min Schnauzer)
2015 Jay Flight 27RLS (Camped: 102 nights 2015, 90 nights 2016)
2006 Ford F350 6.0 PSD, Lariat, 4WD, CC, LB, SRW, auto., Camper pkg.