What Size PVC Pipe with the Replacement Rubber Grommet for RV Gray Water Tanks 1-1/2" Diameter Fit?
Updated 04/20/2026 | Published 04/14/2026
Question:
What size PVC pipe is correct for this fitting? Thanks.
asked by: Matt
Expert Reply:
Hello Matt,
Thanks for writing in.
The Replacement Rubber Grommet for RV Gray Water Tanks - 1-1/2" Inner Diameter # F02-2105 is designed to work with 1-1/2" nominal PVC or ABS pipe, which is the standard size for most RV gray water drain lines.
That 1-1/2" refers to the nominal pipe size. The actual outside diameter of the pipe is about 1.9", which allows it to fit snugly inside the grommet and create a tight seal.
I know choosing the wrong size can lead to a loose fit and leaks at the gray tank, which is frustrating and often means redoing the work. This grommet is made to give you a secure, sealed connection so you can trust your setup and avoid seepage.
Are you working on your motorhome’s gray tank or a project vehicle?
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Product Page this Question was Asked From
Replacement Rubber Grommet for RV Gray Water Tanks - 1-1/2" Inner Diameter
- Accessories and Parts
- RV Toilet
- Tank Grommets
- 1-1/2 Inch Diameter
- Valterra
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