Thetford Drain Valve Lubricant, 20 oz.

Our special water-soluble formula prevents seal wear, sticky drain valves and keeps all the plumbing lines operating smoothly. Approximately 2 ounces in the holding tank effectively lubricates drain valves, lines and walls.

• Lubricates holding tank systems and drain valves from the inside
• Restores easy valve operation
• Coats plumbing lines for smooth tank evacuation
• Works in both grey and black water tanks
• 100% biodegradable liquid