In order to determine the correct waste valve for your 2012 MVP Destiny 5th Wheel you will need to just figure out weather or not the valve you're replacing slid over your pipe or into your pipe.
If your valve slid into your sewer pipe, then you'll need the Valterra Bladex Waste Valve for RV Black Water Tank # T40A,
If your valve slide over your pipe, then you'll need the Valterra Bladex Waste Valve for RV Black Water Tank # T40B,
Or,
If one end slid into a pipe, and one end slid over... view full answer...
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