Install a drain connection in a polyethylene caravan, motorhome or RV holding tank with a Valterra rubber tank grommet. Choose the grommet size to match your drain pipe and required tank opening.
Choose the correct size
- 1½″ pipe: requires a 2½″ hole in the tank.
- 3″ pipe: requires a 3⅞″ hole in the tank.
Measure both the drain pipe and tank opening before ordering. The pipe inserts through the fitted rubber grommet to form the connection.
Installation
- Cut the specified hole size in a compatible polyethylene holding tank.
- Fit the rubber grommet securely into the tank opening.
- Insert the correctly sized drain pipe through the grommet.
- Secure the connection with a suitable hose clamp, sold separately.
Product features
- Designed for polyethylene RV holding tanks.
- Creates a sealed drain-pipe connection.
- Available for 1½″ and 3″ waste plumbing.
- Suitable for compatible caravan, motorhome and RV installations.
Frequently asked questions
What hole size do I need?
The 1½″ grommet requires a 2½″ tank hole. The 3″ grommet requires a 3⅞″ tank hole.
Is a hose clamp included?
No. A compatible hose clamp is required and sold separately.
