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Old 11-24-2021, 09:47 PM   #1
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grey/black water valves

Can you recommend a lubricant for the grey/black water valves...hard to open and close. Thnx!
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Old 11-25-2021, 12:12 AM   #2
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My black valve was sticking and I purchased this: Thetford RV Valve lubricant. Followed the directions over 13 months ago and it has worked great ever since.
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Old 11-26-2021, 12:12 AM   #3
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I use the same product. After dumping my gray or black tank, if Iím not going to be refilling them soon, I pour 4-5 ounces down, followed by a gallon or two of water. It seems to keep them working smoothly, especially if they sit for long during our blistering hot summers.
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Old 11-27-2021, 04:15 PM   #4
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Thanx guys, will order!
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Old 11-27-2021, 05:38 PM   #5
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See the thread below. I did the mod where you drill a small hole in the valve and squirt in lubricant. Both valves have been very smooth for a couple of years after doing this. Highly recommended.

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