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Old 08-14-2016, 07:54 PM   #1
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Join Date: Aug 2016
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2015 xlr 385

Can anyone tell me were the drain valves are located at my black water tank valves are leaking discussting every time I have to take the cap off

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Old 08-21-2016, 03:29 PM   #2
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Join Date: Apr 2011
Posts: 27
They are unde your trailer. If you have an enclosed underbelly, you will need to remove it (drop it down) to access them.

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Old 08-22-2016, 08:50 PM   #3
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Location: Chicago, Rochester now GA/SC at Lake Hartwell
Posts: 117
Our 2014 XLR415 does same thing...irritating.

In my case the knife valve is leaking.
2014 XLR 415AMP, 2011 F350 Lariat 6.7 DRW, three bikes, NRA Benefactors.2013=180, 2014=184, 2015=216, 2016=220 (7300 miles)
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Old 08-22-2016, 10:21 PM   #4
Join Date: Jun 2016
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I put a valve on right at the cap. It saves a lot of unsavory messes for sure. Plus if I ever open the wrong valve on the control panel it is a life saver.

2016 GMC Denali 3500 Duramax DRW
2017 XLR Thunderbolt 340AMP
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