Valterra Dual 1½-Inch and 3-Inch RV Cable Waste Valve Diagram

An RV with separate 1½-inch and 3-inch waste drains may be serviced by Valterra's dual cable-valve kits. Each kit supplies two valves and two separate 72-inch push-pull controls, allowing each waste line to be operated from its own accessible handle location.

1½-inch + 3-inchValve size(s)
72 inchesCable length for linked complete kits
3⅛ and 4⅜ inchesIllustrated cut-wire reference

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

View cable connection drawing

Open Valterra's original PDF to enlarge the letters and hardware.

Open connection diagram (PDF)

Correct cable bends and supports

View proper cable routing

Open the second PDF page to see the approved and unsuitable examples.

Open routing diagrams (PDF)

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

Valterra's cable layout diagram shows a straight six-inch exit at the valve and handle and a minimum 24-inch diameter for a 180-degree cable bend. On the illustrated adjustable-wire arrangement, the short exposed wire is 3⅛ inches at the 1½-inch valve and 4⅜ inches at the 3-inch valve. Plan two independent routes rather than looping cable between valves.

Choose the correct valve or replacement body

TC1372 includes stainless-steel inner-wire cables. TC1372CN uses high-density polymer cables. Confirm both existing waste valve sizes and connection arrangements: the combined kit is not a single valve with a dual-diameter adaptor, and one handle does not open both valves.

Valterra part Valve size What's different
TC1372 One 1½-inch + one 3-inch Two separate 72-inch stainless-inner-wire cable handles
TC1372CN One 1½-inch + one 3-inch Two separate 72-inch high-density polymer cable handles
TC172 One 1½-inch valve Single 72-inch stainless-wire cable kit, not the dual kit
TC372 One 3-inch valve Single 72-inch stainless-wire cable kit, not the dual kit
Each valve gets its own cable and handle. A 72-inch cable length does not guarantee the planned remote mounting point is reachable once the required straight runs and bends are allowed for. Confirm both routes separately.

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.

Valterra TC1372 Dual RV Waste Valve Kit, 1-1/2 & 3 in, Two 72-in Stainless Cables — NewRVParts product photograph for TC1372 / TC1372CN reference
Valterra TC1372 Dual RV Waste Valve Kit, 1-1/2 & 3 in, Two 72-in Stainless Cables1½-inch and 3-inch valves, two stainless-wire 72-inch controls. Confirm the full kit details before ordering.
Valterra TC1372CN Dual RV Waste Valve Kit, 1-1/2 & 3 in, Two 72-in Polymer Cables — NewRVParts product photograph for TC1372 / TC1372CN reference
Valterra TC1372CN Dual RV Waste Valve Kit, 1-1/2 & 3 in, Two 72-in Polymer Cables1½-inch and 3-inch valves, two polymer 72-inch controls. Confirm the full kit details before ordering.
Valterra TC172 1-1/2 in Stainless Cable Waste Valve Kit, 6 ft — NewRVParts product photograph for TC1372 / TC1372CN reference
Valterra TC172 1-1/2 in Stainless Cable Waste Valve Kit, 6 ft1½-inch valve and stainless-wire 72-inch cable kit. Confirm the full kit details before ordering.
Valterra TC372 3 in RV Waste Valve Stainless Cable Kit, 72 in — NewRVParts product photograph for TC1372 / TC1372CN reference
Valterra TC372 3 in RV Waste Valve Stainless Cable Kit, 72 in3-inch valve and stainless-wire 72-inch cable kit. Confirm the full kit details before ordering.

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.

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