Replacing the Gray Water Gate Valve on a 2021 Grand Design Imagine XLS 23BHE

Published 10/24/2026

Question:

Hi, I have a 2021 Grand Design Imagine XLS 23BHE with a leak around the front kitchen gray tank. Ive only noticed it after dumping so I think theres an issue with the gate valve. It opens and closes fine. Can I just replace the o-rings or should I replace the whole valve? Do you know which specific valve will fit? Thanks!

asked by: Stephen U

Expert Reply:

Hi there Stephen! Since you're noticing the leak after dumping, the gate valve or its seals could definitely be the culprit. I'd lean toward replacing the entire valve assembly rather than just the O rings, especially if the valve body or sealing surfaces are worn. That said, it's worth checking the connections and seals around the valve first to make sure the leak is actually coming from the valve itself.

A replacement to look into is the Valterra Bladex Waste Valve with Flexible Cable for RV Gray Water, 1-1/2 inch diameter with a 72 inch cable, part # T1001DSPB-TC72PB. However, I can't confirm that this exact assembly fits your 2021 Grand Design Imagine XLS 23BHE without checking your existing valve and cable setup.

You'll want to confirm that your current valve has a 1-1/2 inch opening and a four bolt flange connection. The cable length is important, too, since the replacement cable needs to reach from the valve to your existing handle. If your current cable is still in good shape, you may be able to replace just the valve body and reuse the cable, depending on the replacement design.

Do you know the length of your existing cable, or could you share a picture of the current valve and its connections? That would help narrow down the right replacement for your RV.

expert reply by: Heather A