We have the Challenger 37TB. We use the standard kits that fasten directly onto the coach sewer connection. Most times when we are staying for more 1 night, we use a "Y" connection that allows connection of both the rear and mid connections. It can be a little nasty to clean up but makes use of the RV seamless.
Note: the method I use for disconnection with the "y" connector is to back flush one side of the connection for a few minutes. Then "walk" any liquid to the "y". I will turn the "y" connector so the flushed out tube is facing up. I remove the hose and install a blank. Then just finish up like it is a single connection.
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US Army Retired - Loving The Road Trip
Challenger 37TB
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