Recommended Replacement Waste Valves for a 1 1/2 Grey tank and a 3" Black Tank
Updated 01/12/2026 | Published 09/01/2024
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Question:
I have a leak on both waste valves, so I pulled everything apart. Ive attached a half dozen photos to make this a little easier. Im pretty certain thats the right part for the grey tank is LaSalle Bristol Waste Valve Body for RV Gray Water w/ Coupler, Seals - 1-1/2inch Diameter 34439241. I cant find a match for the 3inch black tank, but Im thinking that LaSalle Bristol Waste Valve for RV Black Water Tank - 3inch Diameter - Spigot to Spigot 34466N4BB might work. Can you take a look at the attached images and tell me what you think? Thanks for the help! Josh
asked by: Josh F
(click to enlarge)
(click to enlarge)
Expert Reply:
Hey Josh thanks for all of those pictures. After looking at them I can say both the LaSalle Bristol Waste Valve Body for RV Gray Water w/ Coupler # 34439241 for your grey tank and # 34466N4BB for your black tank is going to work perfect as a replacement. These look to be direct replacements so I don't imagine there'll be any hang-ups when you go to swap them out.
Just make sure to use some ABS solvent # 3447530889 to bind everything together and you'll be good to go.
Product Page this Question was Asked From
LaSalle Bristol Waste Valve for RV Black Water Tank - 3" Diameter - Spigot to Spigot
- RV Waste Valves
- Straight Valve
- Single Waste Valve
- 3 Inch Valve Body
- Manual
- 3 Inch Spigot
- Stationary Valve
- LaSalle Bristol
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Robin H.
1/12/2026
Hey Josh, how did the swap go with the LaSalle Bristol waste valves for your grey and black tanks? Did the fit line up as expected once you used the ABS solvent? Your update could make it easier for the next person tackling the same repair.