Welcome to the forum!!!
No need to replace the entire valve, you just need new seals. The valve is a blade that slides between two rubber rings to seal off the tank.
Black is normally 3” and gray is normally 1 1/2”. Only trick is knowing brand of valve. Probably Valterra or Bristol.
You need the proper seal for the brand as they are NOT interchangeable. Just open up the underbelly and it should say on the valve.
If it’s Bristol then get Bristol seals.
If it’s Valterra then get the BladeX seals.
4 screws hold the valve assembly together.
Black valve is 7/16” nut and bolt
Gray will be 5/16” head on bolt and 3/8” nut.
Keep valve closed when installing new seals.
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2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
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