RV Tank Fittings
Between your tank, valve, and hose sits a handful of small parts that do all the connecting and sealing, and any one of them can be the source of a leak or a mismatch. This category covers the elbows, wyes, and adapters that tie the system together: clear 45- and 90-degree elbows, flanged wye and ell valve fittings, flush fittings, fill kits, and the odd drain plug.
95 products
Whitecap Baitwell Drain Plug | 1/2", Brass & Neoprene
ICON Holding Tank Flush Fitting | 2" Slip, ABS Plastic
Valterra ABS Sanitary Tee | 1-1/2 in Hub, DWV Fitting
Valterra ABS Threaded Pipe Nipple | 3" x 4", Both Ends Threaded
Valterra Gray Water Drain Adapter | 3/4" Garden Hose Connection with Plug
Whitecap 3/8" Baitwell Drain Plug | Rubber Livewell Plug
Valterra 3" Close Elbow 60° | 3" Hose x 3" MPT Sewer Fitting
Valterra 3" Hose x 3" MPT Brass Adapter | RV Sewer Fitting
Valterra 2in Slip Hub Flange Fitting | Black
Valterra Female Adapter 1-1/2" Hub x FPT | ABS DWV Fitting
Icon Spin Fitting | Flush, 3" FPT, White
Valterra Flush Bushing | 1-1/2" Hub x 2" Spigot, DWV Fitting
LaSalle Bristol 1-1/2" Slip Socket Flange for RV Waste Valves
Valterra 2" DWV Coupling | ABS Drain-Waste-Vent Fitting
Valterra 90° Tank Fill Elbow Fitting | 3/8 in MPT x 3/8 in Barb, Black ABS
Connecting tanks, valves, and hoses
Fittings are where an RV waste system either seals up clean or drips at every joint. Most are ABS and go together with a bayonet twist-lock, a slip joint, or ABS cement, and the trick is matching the connection type and diameter on both sides. A clear fitting at the dump end is worth having — it's the only way to see when the water finally runs clear.
- Elbows and adapters. A clear 45-degree elbow like the Valterra Clearview or a 90-degree unit like the Camco Rhino Sewer Adapter PRO connects your hose to the ground inlet and threads into a 3-to-4-inch NPT cleanout. The drain-lock ring seals it into the inlet so it doesn't blow back out.
- Wyes and ell fittings. A flanged wye or 2-way ell like the Valterra units combines or splits outlets — handy when you're plumbing two tanks to one hose or adding a second connection point. Rotating flanges let you aim the outlet where you need it.
- Flush and fill fittings. A tank flush fitting (the Icon 2" slip) adds a rinse port to a holding tank, and a fill kit like the Valterra RK907 barbed elbow ties a fresh or gray line into the tank with cement.
- Connection type and size. Bayonet, slip, spigot, hub, and NPT thread don't mix — check what's on your valve and hose before ordering, and confirm the diameter (2" vs. 3") matches.
When you replace a fitting, it's the moment to check the gate valve flange it bolts to and the sewer hose end it mates with — a new adapter against a worn seal still leaks. If you're plumbing a new holding tank, buy the fittings fresh rather than reusing brittle ones.