I’ll give this a try as I do not know on your year exactly what it there. In these cases a picture really, really, really helps. You may have the exact same thing as my 2004, OR not.
Here goes, what I “think” you are looking at is:
The faucet for the shower is a 2 knob on off. Does it look like the one in this pic of mine?
If it is that faucet, the faucet has a plastic vented fitting on the top of it where the water comes out. The vent acts as a vacuum breaker/drain when you turn the water off that air can get in at the hose connection and allow a quantity of water to drain out of the hose.
The assembly is as follows:
- Male threaded white plastic fitting on top of the faucet
- Black washer sits on top of the white plastic fitting on top of the faucet.
- The hose has a free spinning collar (nut) and inside the end of the hose is a crimped on flat faced end that seats against the black washer.
- The hose collar then screws on the threaded fitting sticking up out of the faucet.
The black washer when new has a very slight taper to the outside of it. Over time it may squish into a strange shape OD and get flattened more. It is also a special size so try not to loose it. I did and had one heck of a time buying some replacements.
Hope this helps and is your shower setup.
Current Sunlines: 2004 T310SR, 2004 T1950, 2004 T2475, 2007 T2499, 2004 T317SR
Prior Sunlines: 2004 T2499 - Fern Blue
2005 Ford F350 Lariat, 6.8L V10 W/ 4.10 rear axle, CC, Short Bed, SRW. Reese HP trunnion bar hitch W/ HP DC
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