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How To Get Access To Water Tanks In 2020 Grand Design 240RL To Install Tank Sensor Monitor  

Published 11/03/2026

Question:

my biggest issue is trying ti find out how i get to the top of my tanks i have a grand design reflection 240RL. Any ifo on how easy or hard that might be?

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Expert Reply:

Good morning Dean.

Luckily, you won't have to remove the holding tanks on your 2020 Grand Design Reflection 240RL to install the Fathom RV Tank Monitor System # FM498FR.

Since your camper has an enclosed underbelly, you'll likely need to partially lower that covering to access the tanks which usually is held in with screws or fasteners. From there, you can reach over the tanks, clean the mounting surfaces, and attach the sensors directly to the tops using the included adhesive.

If accessing the tops of the tanks seems difficult and hard to reach, another option is the SeeLeveL Monitoring System # SE99VR, which uses sensors mounted vertically on the sides of the tanks instead. You'd still need access behind the underbelly covering, but reaching the sides may be easier.

Let me know what you think! Do you have any fun trips planned?

expert reply by:
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Andrew N

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