T1035 — 90° elbow with bayonet outlet
A 90° discharge elbow for one matching 3-inch waste-valve flange. Its bayonet-lug end accepts a compatible sewer-hose coupling or outlet cap.
View T1035Valterra RV Waste Outlet Elbows, Wyes & Rotating Flange Parts
Replacing the elbow or collector fitting behind an RV waste valve takes more than identifying a 3-inch drain. These Valterra fittings differ in the number and size of valve flanges and whether the opposite end has a bayonet outlet, pipe hub or spigot. A part with the wrong connection can require changes to the drain system instead of simply fitting the existing assembly.
Valterra waste-pipe fitting comparison
| Valterra part | Exact connection layout |
|---|---|
| T1035 | 3-inch bayonet × 3-inch rotating flange |
| T1035-1 | 3-inch hub × 3-inch rotating flange |
| T1036 | 3-inch bayonet × 3-inch rotating flange × 1½-inch rotating flange |
| T1036-1 | 3-inch spigot × 3-inch rotating flange × 1½-inch rotating flange |
| T1039 | 3-inch bayonet × two 3-inch rotating flanges |
| T1015-1 | 3-inch bayonet × 3-inch rotating flange × 2-inch hub |
Identify each connection end
Rotating flange
A bolted valve connection whose flange can be aligned with the matching valve's mounting holes before assembly.
Bayonet outlet
A waste-discharge outlet with lugs for a matching sewer-hose coupling or outlet cap.
Hub
A socket-style pipe end designed to receive a matching spigot or pipe end.
Spigot
A smooth male pipe end intended to enter a compatible hub connection.
A 3-inch bayonet is not a substitute for a 3-inch hub. Likewise, the 1½-inch flange on T1036 is not a 2-inch hub like the branch of T1015-1. Always check the original connection types and the relative direction of the fittings.
Match the number of valve connections
One flanged waste valve, 90° outlet
One 3-inch valve flange → 90° elbow → either a 3-inch bayonet outlet (T1035) or a 3-inch pipe hub (T1035-1). Choose by what connects to the other end.
Two flanged waste valves, different sizes
One 3-inch flange plus one 1½-inch flange → two-way elbow → either a 3-inch bayonet outlet (T1036) or a 3-inch spigot end (T1036-1). Check the two flange locations as well as the end connection.
Two 3-inch flanges or a 2-inch pipe branch
T1039 uses two 3-inch rotating flanges leading to a 3-inch bayonet. T1015-1 uses one 3-inch rotating flange and a separate 2-inch pipe hub, with a 3-inch bayonet outlet. They are not alternative names for the same assembly.
Compare replacement fittings and photos
T1035-1 — 90° elbow with hub
Similar 90° direction change, but its other end is a 3-inch pipe hub rather than a bayonet sewer-hose outlet. Match it to the pipe joining method on your RV.
View T1035-1T1036 — Two-way elbow with mixed-size valve flanges
Combines a matching 3-inch and 1½-inch flanged waste-valve connection into a 3-inch bayonet outlet. Both flange sizes and their placement must match the installed valves.
View T1036T1036-1 — Two-way elbow with pipe spigot
A mixed-size two-valve elbow like T1036, but with a 3-inch spigot end for a matching pipe socket rather than a bayonet hose connection.
View T1036-1T1039 — Two-way elbow with two 3-inch valve flanges
Joins two compatible 3-inch flanged waste outlets to one 3-inch bayonet sewer connection. It is not the mixed 3-inch/1½-inch version.
View T1039T1015-1 — Reducing wye with 2-inch hub
A reducing wye that joins a compatible 3-inch flanged valve connection and 2-inch hub pipe connection into one 3-inch bayonet outlet. Check the angled branch and pipe alignment.
View T1015-1Before replacing a waste outlet elbow or wye
- Find the original part number on the existing fitting where visible. Compare it with the exact Valterra MPN, not just the general elbow shape.
- Count the inlets and measure their nominal sizes. Record whether there is one flanged connection, two flanges, or a flanged connection plus a separate hub branch.
- Identify the discharge end. Check whether the RV uses a bayonet coupling directly at the fitting or needs a hub or spigot to join fixed plumbing.
- Compare the physical orientation. Check the elbow direction, branch clearance, bolt-hole alignment, and space for the gate valves and handle travel.
- Plan the repair safely. Empty and flush the affected tanks, support connected plumbing, use the correct valve seals and hardware, and follow the instructions for the joint and pipe material. A solvent-weld pipe connection is not the same as a removable bolted flange.
More RV waste-system references
If you need the valve body rather than its connecting elbow, our Valterra Bladex replacement bodies guide covers the common sizes and handles. For the hose-side bayonet connection and dump-station elbows, see our Valterra sewer adapter reference. Valterra's factory flanged-fitting catalogue provides component identification for these fitting families.
Recently viewed
New & Updated RV Parts Inventory — Check Back Often
We’re always adding new and used RV parts to our inventory, so be sure to check back regularly.
If you don’t see the part you need today, we may still have it in stock—our internal database includes thousands of new RV parts that are not yet listed online.
Text or email us with the product number or model, and we’ll check availability for you right away.
Our Products