Wha'ts the Correct Replacement RV Waste Valve for Black Water Tank?
Updated 06/21/2026 | Published 06/15/2026
Products Featured in This Question
Question:
I have a 2019 Keystone Cougar Half Ton 29 RKS fifth wheel. I need a black tank valve assembly but dont know how long the cable should be. Can you help? Thank you, Bob Cheesman
asked by: Bob C
Expert Reply:
Hey Bob, thanks for reaching out!
I can help, the cable length can vary depending on how the plumbing was routed by the manufacturer.
The best way to determine the correct replacement is to measure one of the following:
The existing cable housing length from the back of the pull handle assembly to the valve body.
The overall cable length if the old assembly has already been removed.
Most RV remote waste valves use cables in common lengths such as 48", 72", 96", and 120".
Where do you usually us full hookups or public stations on trips?
Jim
6/21/2026
I got the black and gray valve. They work well. The cable is enclosed all the way and they bolted on perfectly on my Montana High Country. I would pull the belly cover off and measure the cable length before you order. You want a perfect fit with little to no extra cable to bind.
Product Page this Question was Asked From
LaSalle Bristol Cable-Actuated RV Waste Valve - Black Water Tank - Spigot to Spigot - 72" Cable
- RV Waste Valve
- Straight Valve
- Single Waste Valve
- 3 Inch Valve Body
- 72 Inch Cable
- Cable-Actuated
- 3 Inch Spigot
- Stationary Valve
- LaSalle Bristol
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on RV Waste Valve
Glenn
6/18/2026
The best way to do that is to take your old one off and then measure the cable. I just did mine and it's actually not too bad except for trying to find it and cutting the black corrugated underbelly. Etrailer will ship it quickly to you