My 2005 had a cap on the fresh water tank drain line. My 2012 Montana has a valve just above the hose thread end. That way you can attach a hose and direct the output somewhere besides the ground underneath the RV.
There has to be something to stop the tank from draining, particularly if your hose ends with a threaded bib.
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Carl (n Susan)
There is more to life than fuel mileage.
2012 Montana 3700RL Big Sky Package towed by a 2015 Ford F350 6.7L PSD 4WD CC LWB
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