If you need to identify a leaking RV dump valve, a sewer termination elbow or a tank-sensing component, the first step is to determine where the part belongs. Black and gray tanks discharge through their own valves; downstream elbows and hose fittings connect to a disposal point, while tank-level probes sit outside the liquid discharge path. This guide uses exact Valterra part numbers and product photographs to help separate those components.
Which part of the holding-tank system are you looking at?
1. Under the RV: discharge assembly
Different tanks and models may have different valve sizes and positions. A replacement valve body uses existing compatible mounting flanges, not hub/spigot pipe joints.
2. Outside the RV: sewer connection
Clear extensions and rotating-flange elbows are accessories for specific mating ends. They are not replacements for the waste valve that isolates the tank.
Compare the fitting you remove with the one you order
| Part type | Valterra example | What to check |
|---|---|---|
| Complete 3-inch waste valve | T40B | Hub/socket connections on both ends |
| Complete 1½-inch waste valve | T1001 | Smaller hub/spigot connection combination |
| Valve-body replacement | T1003VP | Use between matching flanges and gaskets; not a complete pipe fitting |
| Outlet/elbow replacement | T1035 | 90° elbow with bayonet and rotating flange |
| Clear sewer adapter | T1022 | 10-inch waste-outlet extension; verify mating bayonet/lug profiles |
| Optional flushing attachment | F02-4100 | Separate water-flush function; not a substitute for a waste-valve body |
| Gray holding-tank sensing | T21302VP | Probes for a compatible level-monitor circuit, not a drain fitting |
Check whether the original has a female hub/socket, a male spigot, a rotating flange or a bayonet/lug-style twist connection. Those names describe different physical joints. Compare the valve diameter, mating ends, flange spacing, access to the handle and seals before selecting a replacement.
Compare current UsedRVParts product photographs
Each card links to the exact product record for its stated manufacturer part number. Check the individual listing for condition and availability. Viewing or pickup, where available, is by appointment in Kelowna.
Toilet and macerator parts references
A toilet part, a holding-tank drain valve and a powered macerator discharge system serve different functions. Use the original model number and existing plumbing arrangement to choose the appropriate parts reference.
Continue to model-specific guides
Manufacturer fit and service information
Valterra's 3-inch Bladex replacement valve-body information distinguishes a valve-body replacement from a complete assembled valve. Its 3-inch hub-to-hub valve reference shows why the existing pipe ends matter. For additional fittings, compare the exact Valterra model marking and instructions, not just an apparent similarity in size.