Thetford RV Drain Valve Lubricant 15843， 24 oz. Bottle<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>A water soluble additive that lubricates holding tank systems and drain valves</li><li>Coats plumbing lines for complete outflow of tank contents</li><li>Works in both toilet and sink/shower waste holding tanks</li><li>Prevent RV Holding Tank issues with Thetford's Drain Valve Lubricant</li><li>Prevents sticky valves， restores smooth operation and coats plumbing lines for consistent tank outflow</li><li>Safe for all waste treatment systems; Works in both gray and black water tanks</li><li>100 percent Biodegradable</li><li>Easy to manage 24 ounce bottle</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41yvqOiFCzL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/01akNUttFZS.png" noproxy>