- New
F02-2106 is a Valterra 3" rubber tank grommet designed for use with polyethylene RV holding tanks. It provides a sealed connection between a 3" drain pipe and the holding tank. The grommet installs into a 3-7/8" tank opening, after which the drain pipe is inserted through the grommet and secured with a hose clamp. The clamp is sold separately. Its durable rubber construction provides a flexible, leak-resistant connection for RV waste plumbing applications.