For RV waste plumbing that uses a 3-inch valve, Valterra's TC372 provides a remote folding handle with a 72-inch stainless-wire cable. TC372CN is the high-density polymer cable version. Both operate a 3-inch waste gate from a more accessible location, but are separate cable configurations.
Original Valterra cable connection and routing diagrams
Use the manufacturer's labelled drawing to identify the cable entry, coupler and remote handle mounting. The second page shows acceptable cable routing and bends. Open the PDF for a larger view.
Valve and handle connection
Open Valterra's original PDF to enlarge the letters and hardware.
Correct cable bends and supports
Open the second PDF page to see the approved and unsuitable examples.
What the diagram letters identify
These letters correspond to the actual Valterra connection illustration rather than being substitute part numbers.
| Label | Component | What it does |
|---|---|---|
| C | Red positioning tab | Keeps the handle in its setup position until the cable is attached |
| D | Exposed inner control wire | Transmits the handle movement to the gate coupler |
| E | Flexible cable housing | Guides the inner wire from remote handle to the valve |
| F | Coupler and Allen set screw | Connects the inner wire to the gate shaft |
| G | Collar screws | Secure the cable housing at the valve body |
| H | Handle mounting locknut | Retains the cable handle at the chosen mounting panel |
| I | Collar entry hole | Receives the cable housing at the valve |
In Valterra's cable-valve installation drawing, the exposed inner wire is cut to 4⅜ inches when shortening the cable for a 3-inch valve. The document also calls for six inches of straight cable at both ends and a minimum 24-inch diameter for a 180-degree bend. Follow the particular kit's instructions before trimming a cable.
Choose the correct valve or replacement body
Verify the valve is the 3-inch size before ordering. Check the flange, pipe layout, mounting clearance and where the operating handle will be mounted. A hub-to-spigot valve such as T40H is a different connection configuration from a replacement-only valve body.
| Valterra part | Valve size | What's different |
|---|---|---|
| TC372 | 3-inch | 72-inch stainless-steel inner-wire remote kit |
| TC372CN | 3-inch | 72-inch high-density polymer remote kit |
| T1003PBC | 3-inch | Replacement body with coupler, seals, hardware; no cable |
| T40H | 3-inch hub × spigot | Fixed connections and cable-operated valve; cable not included |
| T1003VP | 3-inch | Manual plastic-handle Bladex valve; no remote cable |
View Valterra products on NewRVParts
Photos are from the corresponding NewRVParts product listings. Compare the complete part number and whether a handle, cable, coupler or seals are included before selecting a replacement.
For full installation instructions and technical literature, visit Valterra's manufacturer downloads library. Ensure the waste system is empty and safely isolated before replacing a valve or opening the drain plumbing.