Toilet Drain Valve Lubricant 24 oz

The Thetford Drain Valve Lubricant prevents sticky valves, restores smooth operation, and coats your plumbing lines from the inside for consistent tank outflow.

Use 4 oz (1/2 cup) to treat both black and gray water tanks for an entire season.

Septic safe. For normal use, empty your RV tanks and close all valves. Works in all temperatures above freezing (32-degrees) and below 100-degrees Fahrenheit. Non-staining formula is safe for any waste treatment system. Do not mix with any other toilet chemicals or tank treatments. Can be safely disposed of at any proper waste station or septic system. Store below 100-degrees Fahrenheit at all times. 100% biodegradable. Sold as a 24 oz bottle. Unlimited shelf life.