Seal the Deal with the 3" Uniseal Grommet for a Leak-Free Connection
The 3" Uniseal Grommet creates a strong, watertight seal between your PVC Schedule 40 pipe and tank, fitting 3" inner diameter pipes and tank walls up to 3/8" thick. Made in the USA, this durable black grommet installs easily with a 4" hole saw—perfect for secure, leak-free tank fittings.---
3" Uniseal Grommet - Black U300
This grommet will connect your PVC Schedule 40 pipe to your tank and create a seal on your tank that will last!
Fitting Specifications:
- Pipe ID - 3" (76mm)
- Pipe OD - 3.500" (89mm)
- Hole Saw size: 4" (101mm)
- Up to 3/8" Wall Thickness. (9mm)
Sold in Each and made in the USA
Installation tips: Measure twice and after cutting your hole, smooth out any rough edges to get the best seal.
| Color | Black |
|---|---|
| Hole saw size (inches) | 4 |
| Hole saw size (millimeters) | 101 |
| Pipe inner diameter (inches) | 3 |
| Pipe outer diameter (inches) | 3.5 |
| Maximum wall thickness (inches) | 0.375 |
| Pipe inner diameter (millimeters) | 76 |
| Pipe outer diameter (millimeters) | 89 |
| Maximum wall thickness (millimeters) | 9 |
- What size pipe does the 3" uniseal grommet fit? The 3" Uniseal Grommet fits a pipe with an inner diameter of 3" (76mm) and an outer diameter of 3.5" (89mm).
- What size hole do i need to cut for installing this uniseal grommet? You need to cut a 4" (101mm) hole to install the 3" Uniseal Grommet.
- What is the maximum tank wall thickness this grommet can be used with? This grommet can be used with tank wall thicknesses up to 3/8" (9mm).
- Is the 3" uniseal grommet made in the usa? Yes, the 3" Uniseal Grommet is made in the USA.
- Do you have any installation tips for the 3" uniseal grommet? Measure twice before cutting your hole, and after cutting, smooth out any rough edges to ensure the best seal.
100% Authentic OEM Parts
Factory-Fresh OEM Parts — the same brands installed in new RVs straight from Elkhart. Genuine, name-brand components made to order — never generic, never outdated. Sourced directly from the original RV manufacturers for perfect fit and factory-level quality.