Should RV Black Water Tank Valve Close All the Way
Updated 12/22/2025 | Published 10/10/2024
Question:
I just removed a Bristol black tank valve. With the gate in the closed position, I can see daylight through the gaps between the gate and the housing. Question 1: Is this normal and if so what stops the leak? Question 2: Is the Valterra valve designed the same way?
asked by: Wade S
Expert Reply:
Hey Wade, if you can see light through the opening of the valve with it in the "closed" position that would indicate it's not in good shape and in need of being replaced. Valterra valves like the part # T68C close all the way which is probably what your did when it was new. You might see if you can push the valve a little harder to see if will close further.
Product Page this Question was Asked From
Double RV Waste Valves - Heel Inlet - Rotating - 3" Hub and 1-1/2" Spigot
- RV Waste Valves
- Inlet Tee
- Double Waste Valve
- 1-1/2 Inch Valve Body
- 3 Inch Valve Body
- Manual
- 1-1/2 Inch Spigot
- 3 Inch Hub
- Rotating Valve
- Valterra
more information >
Continue Researching
- Article: How to Adjust Your Trailer Brakes | The Ultimate Guide
- Q&A: Direct Replacement For A Bristol Double Hub V93B15
- Q&A: How are RV Sewer Lines Typically Sealed to Each Other and Can they be Separated
- Q&A: Rubber Grommet Connector Between Black Water Tanks and Waste Valve.
- Q&A: Are Valterra And LaSalle Bristol RV Waste Gate Valves Interchangeable
- Q&A: Replacement Cable Actuated Waste Valve Options For A 2011 Keystone Montana High Country 5th Wheel
- Q&A: Replacement Latch for a Yakima SkyBox 18 Rooftop Cargo Box
- Q&A: Flange to Furthest Point Out on Valterra RV Sewer Elbow # T1035-1
Jameson C.
12/22/2025
Hey Wade, did pushing the valve a bit harder help it close all the way and stop the light from showing through? Knowing how that worked out could help others checking their black tank valves for the same issue.