Replacement 1/2" Male Adapter for 2019 Grand Design Nautilus Water Heater Panel
Updated 07/09/2025 | Published 06/26/2025
Question:
I have a 2019 Grand Design with natilus panel. On the back of the hot water heater there is a connector that screws into the tank and then the 1/2inch pex screws into the other end. That piece is leaking. Is this the correct item to replace it with?
asked by: Jeff T
(click to enlarge)
Expert Reply:
Hey Jeff, thanks for reaching out!
The LaSalle Bristol Straight Coupler Fitting # LSB42XR has 1/2" MPT x 1/2" MPT fittings on both ends. I'm not quite sure what fitting that is on your 2019 Grand Design, but if you measure the thread diameter you should be able to verify if these will fit your setup or not.
Sorry I can't be more direct with an answer. The Pex systems are a little different so unless it's labeled to fit exactly, it can be kind of touch and go in my experience.
Product Page this Question was Asked From
LaSalle Bristol Straight Coupler Fitting - 1/2" MPT x 1/2" MPT
- RV Fresh Water
- Supply Water
- Fittings
- Plastic
- Straight Coupler
- 1/2 Inch
- Threaded
- LaSalle Bristol
more information >
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Jeffrey
7/9/2025
Update, the connector piece to the hot water tank is actually a 1/2" male check valve.