Install this rubber grommet into your polyethylene holding tank to create a watertight seal for your drain line. The 1.5-inch inner diameter accommodates most RV drain piping, while the grommet itself seats in a 2.5-inch tank opening. Once installed, your drain pipe slides inside and a hose clamp compresses around both to lock the connection permanent.

• 1-1/2 inch inner diameter
• Fits 2-1/2 inch tank opening
• Rubber construction
• For polyethylene tanks only