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Here’s what I found with my kitchen grey tank. After using a tank blaster (grease and food blockage?) and a borescope (not rigid enough), I decided to go in 100%. First thing I did was remove the curtain in the pass through to inspect things; all good, dry, tight fittings. Next was to drop the belly pan. Not a job for the faint of heart. The screws came out ok, but the propane fittings were not easy. Dissimilar metals = corrosion. I broke half of them. Ugh.
After identifying the kitchen grey tank, I checked the actuation of the blade valve; no problems. So I figured that I would have to disassemble the valve itself. Not easy; I had to cut the 1-1/2” ABS in order to get it apart. What I found was a dried blob of yellow ABS glue that had dislodged from inside the tank and was blocking the valve. As you can see, that’s why I was only getting a trickle when I drained the gray tank. In order to get the ABS pipe back together again, I had to cut off an extra inch, and then slide in a silicone adapter.
Could an RV dealer have discovered this? Maybe with a better scope. Would backflushing have solved the problem? Sure, temporarily.
I will say this; I’m in no hurry to drop that belly pan again.
After identifying the kitchen grey tank, I checked the actuation of the blade valve; no problems. So I figured that I would have to disassemble the valve itself. Not easy; I had to cut the 1-1/2” ABS in order to get it apart. What I found was a dried blob of yellow ABS glue that had dislodged from inside the tank and was blocking the valve. As you can see, that’s why I was only getting a trickle when I drained the gray tank. In order to get the ABS pipe back together again, I had to cut off an extra inch, and then slide in a silicone adapter.
Could an RV dealer have discovered this? Maybe with a better scope. Would backflushing have solved the problem? Sure, temporarily.
I will say this; I’m in no hurry to drop that belly pan again.
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