The Uniseal Warehouse - 1" Uniseal Grommet - White - PVC Schedule 40 Pipe Tank Fitting - 1-3/4" Hole Saw - U100-W
The Uniseal Warehouse - 1" Uniseal Grommet - White - PVC Schedule 40 Pipe Tank Fitting - 1-3/4" Hole Saw - U100-W
The 1" Uniseal Grommet White (U100-W) by The Uniseal Warehouse delivers a permanent, leak-proof connection between 1" PVC Schedule 40 pipe and your RV holding tank — no adhesives, no clamps, no mess. Just push the pipe through and the compression seal does the rest.
Features & Specifications
- Pipe ID (Inner Diameter): 1" (25mm)
- Pipe OD (Outer Diameter): 1.315" (33mm)
- Required Hole Saw Size: 1-3/4" (44mm)
- Maximum Wall Thickness: Up to 3/8" (9mm)
- Material: UV-Resistant Thermoplastic Elastomer
- Compatible Pipe: PVC Schedule 40
- UPC: 00850026906103
- Country of Origin: Made in USA
- Sold: Individually (Each)
Why Choose the U100-W Uniseal Grommet?
The 1" Uniseal Grommet U100-W steps up to a 1-3/4" hole saw — larger than the 1/2" and 3/4" sizes — making it the right choice for higher-flow drain, fill, and vent connections on RV tanks. The compression-seal design requires zero adhesives or sealants; the UV-resistant thermoplastic elastomer grips the pipe and tank wall to form a watertight bond that lasts for years.
Trusted by RV manufacturers and repair shops nationwide, the U100-W carries a perfect 5.0-star rating from verified buyers. It's the same OEM-grade fitting used in original RV production — now available direct from an authorized Uniseal Warehouse retailer.
Compare Uniseal Grommet Sizes
Use this table to match your pipe's outer diameter to the correct Uniseal grommet and hole saw size before ordering.
| Model | Pipe ID | Pipe OD | Hole Saw Size | Max Wall Thickness | Best For | View Details |
|---|---|---|---|---|---|---|
| U050-W | 1/2" (13mm) | 0.84" (21mm) | 1-1/4" (32mm) | 3/8" (9mm) | Small sensors, vents, low-flow connections | View U050-W |
| U075-W | 3/4" (19mm) | 1.050" (27mm) | 1-1/4" (32mm) | 3/8" (9mm) | Standard RV tank vents, drains, fill lines | View U075-W |
| U100-W (This Product) | 1" (25mm) | 1.315" (33mm) | 1-3/4" (44mm) | 3/8" (9mm) | Higher-flow drains, fills, larger tank connections | Current Page |
| U150-W | 1-1/2" (38mm) | 1.900" (48mm) | 2-1/2" (64mm) | 3/8" (9mm) | Main tank drain connections, large-diameter plumbing | View U150-W |
| U200-W | 2" (50mm) | 2.375" (60mm) | 3" (76mm) | 3/8" (9mm) | Main fill/dump connections, large tank plumbing | View U200-W |
Tip: Always measure your pipe's outer diameter (OD) — not the nominal pipe size — to confirm the correct Uniseal grommet size before ordering. The U100-W requires a larger 1-3/4" hole saw than the 1/2" and 3/4" sizes.
Technical Specifications
- Part Number: U100-W
- UPC: 00850026906103
- Pipe Compatibility: PVC Schedule 40, 1" nominal pipe
- Pipe Inner Diameter: 1" (25mm)
- Pipe Outer Diameter: 1.315" (33mm)
- Required Hole Saw: 1-3/4" (44mm)
- Maximum Tank Wall Thickness: 3/8" (9mm)
- Color: White
- Material: UV-Resistant Thermoplastic Elastomer
- Installation Method: Compression seal — no adhesives required
- Origin: Made in USA
- Unit: Sold individually (Each)
What's Included
- One (1) 1" Uniseal Grommet — White (U100-W)
- Manufacturer warranty against defects
Compatible Models & Alternatives
Need a different pipe size? Browse the full Uniseal Grommet lineup: 1/2" U050-W, 3/4" U075-W, 1-1/2" U150-W, and 2" U200-W. Browse our full RV Tank Fittings collection for additional tank plumbing components.
Frequently Asked Questions
What hole saw size do I need for the U100-W Uniseal Grommet?
The U100-W requires a 1-3/4" (44mm) hole saw — note this is larger than the 1-1/4" hole saw used for the 1/2" and 3/4" Uniseal sizes. Always confirm your hole saw size before cutting.
Is the U100-W compatible with PVC Schedule 80 pipe?
The U100-W is designed and rated for PVC Schedule 40 pipe. Schedule 40 and Schedule 80 share the same outer diameter for 1" nominal pipe (1.315"), so it may physically fit, but we recommend using it as specified with Schedule 40 for optimal sealing performance.
How do I install a 1" Uniseal grommet?
Cut a 1-3/4" hole in your tank wall, smooth the edges, insert the grommet into the hole, then push your 1" PVC pipe through the grommet. The compression seal forms automatically — no glue or sealant needed. Measure twice before cutting!
What is the maximum tank wall thickness for the U100-W?
The U100-W accommodates tank walls up to 3/8" (9mm) thick, which covers the vast majority of RV polyethylene holding tanks.
Can I use this grommet for both fresh water and waste water tanks?
Yes — the U100-W is suitable for fresh water, grey water, and black water holding tanks. The UV-resistant thermoplastic elastomer material is safe for potable water applications.
Where can I buy the U100-W Uniseal Grommet?
ElkhartRVParts.com is an authorized retailer of The Uniseal Warehouse products. Order directly here for guaranteed authentic parts with fast shipping.
Why Buy from Elkhart RV Parts?
We are an authorized dealer of The Uniseal Warehouse, meaning every U100-W grommet you purchase from us is 100% genuine OEM-grade. We stock authentic parts, ship fast, and back every order with our 30-day return policy. Our team knows RV plumbing — we're here to make sure you get the right part the first time.
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Description
The 1" Uniseal Grommet White (U100-W) by The Uniseal Warehouse delivers a permanent, leak-proof connection between 1" PVC Schedule 40 pipe and your RV holding tank — no adhesives, no clamps, no mess. Just push the pipe through and the compression seal does the rest.
Features & Specifications
- Pipe ID (Inner Diameter): 1" (25mm)
- Pipe OD (Outer Diameter): 1.315" (33mm)
- Required Hole Saw Size: 1-3/4" (44mm)
- Maximum Wall Thickness: Up to 3/8" (9mm)
- Material: UV-Resistant Thermoplastic Elastomer
- Compatible Pipe: PVC Schedule 40
- UPC: 00850026906103
- Country of Origin: Made in USA
- Sold: Individually (Each)
Why Choose the U100-W Uniseal Grommet?
The 1" Uniseal Grommet U100-W steps up to a 1-3/4" hole saw — larger than the 1/2" and 3/4" sizes — making it the right choice for higher-flow drain, fill, and vent connections on RV tanks. The compression-seal design requires zero adhesives or sealants; the UV-resistant thermoplastic elastomer grips the pipe and tank wall to form a watertight bond that lasts for years.
Trusted by RV manufacturers and repair shops nationwide, the U100-W carries a perfect 5.0-star rating from verified buyers. It's the same OEM-grade fitting used in original RV production — now available direct from an authorized Uniseal Warehouse retailer.
Compare Uniseal Grommet Sizes
Use this table to match your pipe's outer diameter to the correct Uniseal grommet and hole saw size before ordering.
| Model | Pipe ID | Pipe OD | Hole Saw Size | Max Wall Thickness | Best For | View Details |
|---|---|---|---|---|---|---|
| U050-W | 1/2" (13mm) | 0.84" (21mm) | 1-1/4" (32mm) | 3/8" (9mm) | Small sensors, vents, low-flow connections | View U050-W |
| U075-W | 3/4" (19mm) | 1.050" (27mm) | 1-1/4" (32mm) | 3/8" (9mm) | Standard RV tank vents, drains, fill lines | View U075-W |
| U100-W (This Product) | 1" (25mm) | 1.315" (33mm) | 1-3/4" (44mm) | 3/8" (9mm) | Higher-flow drains, fills, larger tank connections | Current Page |
| U150-W | 1-1/2" (38mm) | 1.900" (48mm) | 2-1/2" (64mm) | 3/8" (9mm) | Main tank drain connections, large-diameter plumbing | View U150-W |
| U200-W | 2" (50mm) | 2.375" (60mm) | 3" (76mm) | 3/8" (9mm) | Main fill/dump connections, large tank plumbing | View U200-W |
Tip: Always measure your pipe's outer diameter (OD) — not the nominal pipe size — to confirm the correct Uniseal grommet size before ordering. The U100-W requires a larger 1-3/4" hole saw than the 1/2" and 3/4" sizes.
Technical Specifications
- Part Number: U100-W
- UPC: 00850026906103
- Pipe Compatibility: PVC Schedule 40, 1" nominal pipe
- Pipe Inner Diameter: 1" (25mm)
- Pipe Outer Diameter: 1.315" (33mm)
- Required Hole Saw: 1-3/4" (44mm)
- Maximum Tank Wall Thickness: 3/8" (9mm)
- Color: White
- Material: UV-Resistant Thermoplastic Elastomer
- Installation Method: Compression seal — no adhesives required
- Origin: Made in USA
- Unit: Sold individually (Each)
What's Included
- One (1) 1" Uniseal Grommet — White (U100-W)
- Manufacturer warranty against defects
Compatible Models & Alternatives
Need a different pipe size? Browse the full Uniseal Grommet lineup: 1/2" U050-W, 3/4" U075-W, 1-1/2" U150-W, and 2" U200-W. Browse our full RV Tank Fittings collection for additional tank plumbing components.
Frequently Asked Questions
What hole saw size do I need for the U100-W Uniseal Grommet?
The U100-W requires a 1-3/4" (44mm) hole saw — note this is larger than the 1-1/4" hole saw used for the 1/2" and 3/4" Uniseal sizes. Always confirm your hole saw size before cutting.
Is the U100-W compatible with PVC Schedule 80 pipe?
The U100-W is designed and rated for PVC Schedule 40 pipe. Schedule 40 and Schedule 80 share the same outer diameter for 1" nominal pipe (1.315"), so it may physically fit, but we recommend using it as specified with Schedule 40 for optimal sealing performance.
How do I install a 1" Uniseal grommet?
Cut a 1-3/4" hole in your tank wall, smooth the edges, insert the grommet into the hole, then push your 1" PVC pipe through the grommet. The compression seal forms automatically — no glue or sealant needed. Measure twice before cutting!
What is the maximum tank wall thickness for the U100-W?
The U100-W accommodates tank walls up to 3/8" (9mm) thick, which covers the vast majority of RV polyethylene holding tanks.
Can I use this grommet for both fresh water and waste water tanks?
Yes — the U100-W is suitable for fresh water, grey water, and black water holding tanks. The UV-resistant thermoplastic elastomer material is safe for potable water applications.
Where can I buy the U100-W Uniseal Grommet?
ElkhartRVParts.com is an authorized retailer of The Uniseal Warehouse products. Order directly here for guaranteed authentic parts with fast shipping.
Why Buy from Elkhart RV Parts?
We are an authorized dealer of The Uniseal Warehouse, meaning every U100-W grommet you purchase from us is 100% genuine OEM-grade. We stock authentic parts, ship fast, and back every order with our 30-day return policy. Our team knows RV plumbing — we're here to make sure you get the right part the first time.
