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Pair this coupler with a sewer pipe adapter (sold separately) to connect a rigid drain pipe to your RV's waste valve. One end secures to a 3" diameter rigid pipe, and the other end secures to the sewer pipe adapter. Includes 2 hose clamps.
Features:
Specs:
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Today we're going to be taking a look at the Valterra Flexible Sewer Coupler. This is used to covert from an RV flexible drain hose system to a rigid pipe connection to the sewer. It includes the hose clamps, one at each end for easy security. It's going to couple standard three inch, schedule 40 ABS pipe. A few measurements to go over with you real quick. Inner diameter, it's going to measure three and a half inches.
External diameter, about four and one eighth. That's going to be the same on each side. You see you got the nice metal hose clamps, very easy to use. Tighten those down using a flat blade screwdriver or a small socket. Measuring edge to edge going this direction, we're looking at about two and one quarter inches.
That's going to do it for today's look at the Valterra Flexible Sewer Coupler.
Customer Satisfaction Score:
95% were satisfied with this product
5% of customers were not satisfied
Ratings & Reviews

Fred
8/13/2026
Its been good and no leaks.


Bruce
1/15/2022
No leaks no problems.

Gwendolyn Y.
3/13/2025
That's a relief, Bob! A leaking grey or black water tanks is definitely not ideal! Glad everything worked out :)
Do you have a question about this RV Sewer Hose Fitting?
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Lazer S.
8/19/2026
Glad we had what you were needing, John! It's always nice when things fit together properly! ^___^ Now that you have that all sorted out, where are you headed?