Lesso America
ABS DWV Reducing Vent Tee (HUB x HUB x HUB)
- SKU:
- LN441R
- Availability:
- Usually Ships Same Day
- Weight:
- 0.00 LBS
Description
ABS DWV Reducing Vent Tee (HUB x HUB x HUB)
ABS DWV Reducing Vent Tees provide a three-way vent connection while transitioning between different nominal pipe sizes in non-pressure drain, waste, and vent systems.
Featuring hub connections on all three ends, this fitting is designed to connect compatible ABS DWV piping where a vent branch or main vent connection must transition between different pipe sizes. The reducing configuration helps eliminate the need for a separate reducer in certain layouts while maintaining a compact tee-style connection. Manufactured for ABS DWV service, it meets recognized standards including ASTM D2661, CSA B181.1, and NSF Standard 14.
Product Highlights
- ABS DWV reducing vent tee
- Hub x Hub x Hub connection configuration
- Three hub connections for compatible ABS DWV pipe
- Provides a three-way vent connection
- Transitions between different nominal pipe sizes
- Can reduce the need for a separate reducer
- Designed for vent piping applications
- Supports airflow through DWV vent systems
- Designed for solvent-cement installation
- Suitable for drain, waste, and vent systems
- Non-pressure fitting
- Maximum operating temperature of 140°F
- Not intended for compressed air or gas service
- Not intended for pressure testing
- Manufactured from virgin ABS polymers
- Complies with ASTM D2661
- Certified to CSA B181.1
- Meets NSF Standard 14 requirements
Technical Specifications
| Product Type | ABS DWV Reducing Vent Tee |
|---|---|
| Material | ABS |
| Connection Type | Hub x Hub x Hub |
| Configuration | Reducing Vent Tee |
| Number of Connections | 3 |
| Joint Method | Solvent Cement |
| System Type | Drain, Waste, and Vent (DWV) |
| Intended Service | Vent Piping |
| Pressure Service | Non-Pressure |
| Maximum Operating Temperature | 140°F |
| Primary Function | Provide a Three-Way Vent Connection While Transitioning Between Different ABS DWV Pipe Sizes |
| Referenced Standards | ASTM D3965, ASTM D2661, CSA B181.1, NSF Standard 14 |
| Typical Applications | Vent Stacks, Branch Vents, Fixture Venting, Residential Plumbing, Commercial Plumbing, and Reduced-Size DWV Vent Connections |
Connection Configuration
Main Vent Connections
Two hub connections form the primary vent path and accept compatible ABS DWV pipe for solvent-cement installation.
Reducing Branch Connection
The third hub provides the branch connection and may be a different nominal size than the main run, depending on the specific fitting variation.
Reducing Vent Tee Design
The reducing vent tee combines a standard three-way tee configuration with a pipe-size transition in one molded ABS fitting.
This design can simplify venting layouts where a smaller or differently sized branch must connect to a larger main vent line without adding a separate reducing fitting.
Because the exact reduced connection depends on the specific fitting variation, all three nominal sizes should be confirmed before ordering.
Why Choose an ABS DWV Reducing Vent Tee?
Vent & Size Transition
- Provides a three-way vent connection
- Transitions between different pipe sizes
- Can reduce the need for a separate reducer
- Useful for branch vent connections
- Compact molded configuration
ABS DWV Benefits
- Lightweight construction
- Easy handling and installation
- Suitable for non-pressure vent systems
- Compatible with ABS DWV piping systems
- Designed for long-term plumbing service
Typical Applications
Vent Systems
- Vent stacks
- Branch vents
- Fixture vents
- Individual vent connections
- General DWV vent piping
Reducing Connections
- Reduced-size branch vents
- Different-size vent piping
- Residential plumbing
- Commercial plumbing
- ABS DWV system modifications
Standards & Compliance
- ASTM D3965: ABS material requirements for pipe extrusion and molded fittings
- ASTM D2661: Schedule 40 ABS drain, waste, and vent pipe and fittings
- CSA B181.1: ABS drain, waste, and vent pipe, fittings, and accessories
- NSF Standard 14: Plastic piping system components and related materials
Installation
Verify all three nominal hub sizes before installation and identify which connection provides the size reduction.
Cut all mating ABS pipe ends square and remove burrs. Clean and prepare the pipe and hub surfaces according to accepted ABS solvent-cement installation procedures.
Dry-fit the assembly first to confirm main vent orientation, branch location, and correct pipe-size transition before applying solvent cement.
Apply compatible ABS solvent cement as required and fully seat each pipe into its corresponding hub while maintaining proper alignment.
Allow completed joints to cure according to the solvent cement manufacturer's recommendations before placing the vent system into service.

Our piping specialists can help review your main vent size, branch size, fitting orientation, and ABS DWV compatibility before you order.
Email the GetPipe.com Team Visit Quick SupportFrequently Asked Questions
What is an ABS DWV reducing vent tee used for?
It is used to provide a three-way vent connection while transitioning between different ABS DWV pipe sizes.
What does HUB x HUB x HUB mean?
It means all three connections are hub-style connections designed to accept compatible ABS DWV pipe.
What makes this fitting reducing?
At least one hub connection is a different nominal size from another connection, allowing the fitting to transition between different pipe sizes.
Which connection is reduced?
The reduced connection depends on the specific size variation. Verify all three connection sizes before ordering.
Is a reducing vent tee the same as a reducing sanitary tee?
No. Although both provide a size transition, this product is specifically identified as a vent tee and is intended for appropriate vent piping applications.
Does this fitting require solvent cement?
Yes. All three hub connections are intended for compatible ABS solvent-cement installation.
Is this fitting intended for pressure systems?
No. This fitting is intended for non-pressure ABS DWV applications.
Can it be used for compressed air or gas?
No. The supplied product information states that ABS DWV fittings are not intended for transporting compressed air or gas.
Can this fitting be used for pressure testing?
No. The supplied product information states that ABS DWV fittings should not be used for pressure testing.
What should I verify before ordering?
Confirm all three nominal hub sizes, which connection is reduced, branch orientation, mating ABS DWV pipe sizes, and the intended non-pressure vent application.
Important Ordering & Installation Notes
- This listing is for an ABS DWV Reducing Vent Tee with HUB x HUB x HUB connections.
- Verify all three nominal connection sizes before ordering.
- At least one connection may differ in size from the others.
- Confirm which connection provides the reduced-size transition.
- All three connections are hub-style connections.
- All hubs accept compatible ABS DWV pipe.
- Confirm the required branch orientation before installation.
- Dry-fit the complete assembly before applying solvent cement.
- This fitting is intended for non-pressure DWV vent applications.
- Do not use for transporting compressed air or gas.
- Do not use for pressure testing.
- Maximum operating temperature is 140°F.
- Use compatible ABS solvent cement for installation.
- Cut pipe square and remove burrs before assembly.
- Clean and prepare all mating surfaces before solvent-cement installation.
- Fully seat each ABS pipe into its corresponding hub.
- Maintain proper main and branch vent alignment during installation.
- Allow completed joints to cure according to the solvent cement manufacturer's recommendations before service.
- Protect the fitting from incompatible chemicals, fire-stopping materials, thread sealants, and other aggressive agents that may damage ABS compounds.
- Consult manufacturer documentation for complete dimensions and available reducing configurations.
- Follow applicable plumbing codes and manufacturer installation recommendations.