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Thought about lubricating, but they were five years old. Fix the bolts in it and attach data cables with the main DC power supply of the RV. We use cookies to ensure that we give you the best experience on our website. How to Fix & Lubricate a Sticky Hard to Pull RV Holding Tank Dump Valve - RV Hacks, Tips & Tricks! My rod is getting really hard to pull out or to seat the valve fully closed. So make sure you dont undo the bolts too much. Safe travels, Once a year I dump some vegetable oil down each waste water tank as well as use the usual supplied straw that comes with every can of spray lube and force some lube by the handle end of the cable. Remove the valve from the flanges. Theres no guarantee any of these things will work, but they are worth trying if you need to get those drain valves open to dump your RV. Home Fix For Hard To Open & Close RV Black Or Grey Tank Valves. My valves are due for a little lube too. How much veg oil do you pour in? What Is Primitive Camping? Save my name and email in browser cookies for the next time I comment so I won't have to enter that information again. Oh, for goodness sakes we have a 2000 Sunnybrook travel trailer and when our grey/black tank dump valves become harder to pull, we simply spray the metal rod connected to the T handle with silicone spray (NOT WD 40). it is going to the teens for 5 days and I cant empty black tank!!! Dave Solberg is a leading expert in the RV industry and author of the RV Handbook as well as the Managing Editor of the RV Repair Club. Once a year I dump some vegetable oil down each waste water tank as well as use the usual supplied straw that comes with every can of spray lube and force some lube by the handle end of the cable. Glad to hear it worked for you. Or send your inquiries to him using the form below. Like adding water and treatment to the black tank. If you like the hole drilling method make sure you spray lubricant inside the gate valve once or twice every year to keep it working correctly. One other item to inspect is the proper installation of the cable, if it applies to your vehicle.