Lesso America
ABS DWV Closet Flange w/ Threaded Test Plug (HUB)
- SKU:
- LN800T
- Availability:
- Usually Ships Same Day
- Weight:
- 0.00 LBS
Description
ABS DWV Closet Flange w/ Threaded Test Plug (HUB)
ABS DWV Closet Flanges with Threaded Test Plug provide a secure toilet-to-drain connection while incorporating a removable threaded plug for approved DWV testing during installation.
Featuring a hub connection for compatible ABS DWV pipe, this closet flange is designed to connect and support a toilet at the sanitary drainage system while providing a reusable threaded test plug during rough-in. The threaded plug allows the flange opening to be closed for approved leak testing and can be removed when the toilet is ready to be installed. Compared with a knockout-style plug, the threaded design can also be removed and reinstalled as needed during the installation process. Manufactured for ABS DWV service, it meets recognized standards including ASTM D2661, CSA B181.1, and NSF Standard 14.
Product Highlights
- ABS DWV closet flange with threaded test plug
- Hub connection configuration
- Designed for toilet installations
- Includes removable threaded test plug
- Provides temporary closure during approved DWV testing
- Threaded plug can be removed and reinstalled
- Provides connection between a toilet and ABS DWV piping
- Supports secure fixture mounting at floor level
- Hub connection accepts compatible ABS DWV pipe
- Designed for solvent-cement installation
- Suitable for sanitary drain, waste, and vent systems
- Suitable for residential and commercial plumbing applications
- Non-pressure fitting
- Maximum operating temperature of 140°F
- Not intended for compressed air or gas service
- Testing should be limited to the intended threaded test-plug application
- 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 Closet Flange with Threaded Test Plug |
|---|---|
| Material | ABS |
| Connection Type | Hub |
| Test Feature | Removable Threaded Test Plug |
| Joint Method | Solvent Cement |
| System Type | Drain, Waste, and Vent (DWV) |
| Pressure Service | Non-Pressure |
| Maximum Operating Temperature | 140°F |
| Primary Function | Connect and Support a Toilet While Providing Removable DWV Test Closure |
| Referenced Standards | ASTM D3965, ASTM D2661, CSA B181.1, NSF Standard 14 |
| Typical Applications | Toilet Installations, Residential Bathrooms, Commercial Restrooms, Sanitary Drainage, and ABS DWV Systems |
Connection Configuration
ABS Hub Connection
The hub accepts compatible ABS DWV pipe and is designed for a permanent solvent-cement connection to the sanitary drainage system.
Threaded Test Plug
The removable threaded plug closes the flange opening during approved DWV testing and can be unscrewed when the toilet is ready for installation.
Threaded Test Plug Design
The threaded test plug provides a removable closure at the closet flange during the rough-in and testing stage of installation.
This allows the drainage system to be closed at the toilet connection while an appropriate DWV leak test is performed.
Because the plug is threaded rather than a knockout, it can be removed without breaking it out of the flange and may be reinstalled as needed during the installation process.
Why Choose an ABS DWV Closet Flange with Threaded Test Plug?
Reusable Test Access
- Includes removable threaded test plug
- Allows temporary closure during rough-in
- Plug can be removed and reinstalled
- Useful for approved DWV leak testing
- Convenient during staged construction
Fixture Connection
- Designed specifically for toilet installations
- Connects directly to ABS DWV piping
- Provides fixture mounting interface at floor level
- Suitable for residential and commercial plumbing
- Compatible with non-pressure ABS DWV systems
Typical Applications
Toilet Installations
- Residential bathrooms
- Commercial restrooms
- New construction
- Bathroom remodels
- ABS DWV closet connections
Rough-In & Testing
- DWV system rough-in
- Pre-fixture leak testing
- Temporary closet opening closure
- Staged plumbing construction
- Residential and commercial plumbing
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 the nominal hub size before installation and confirm compatibility with the intended ABS DWV closet drain piping.
Position the flange at the proper elevation and orientation for the finished floor and toilet installation.
Cut the mating ABS pipe square and remove burrs. Clean and prepare the pipe and hub surfaces according to accepted ABS solvent-cement installation procedures.
Dry-fit the flange before applying solvent cement to confirm pipe engagement, flange orientation, mounting alignment, and access to the threaded test plug.
Apply compatible ABS solvent cement as required and fully seat the pipe into the hub while maintaining correct flange position.
Install the threaded test plug securely for the manufacturer's intended DWV testing procedure. After testing is complete, remove the plug before installing the toilet.
Secure the flange and complete the toilet connection according to applicable plumbing requirements and manufacturer installation recommendations.

Our piping specialists can help review your drain size, flange configuration, test-plug requirements, and ABS DWV compatibility before you order.
Email the GetPipe.com Team Visit Quick SupportFrequently Asked Questions
What is an ABS DWV closet flange with threaded test plug used for?
It connects a toilet to an ABS DWV system while providing a removable threaded closure for approved testing before the fixture is installed.
What does HUB mean?
It means the flange has a socket-style connection designed to accept compatible ABS DWV pipe.
What is the purpose of the threaded test plug?
The plug temporarily closes the toilet opening during rough-in so the DWV system can be tested before final fixture installation.
Can the threaded test plug be reused?
The threaded design allows the plug to be removed and reinstalled during the installation process, unlike a knockout plug that is permanently removed once opened.
How is this different from a knockout test-plug flange?
This version uses a removable threaded plug. A knockout-style flange uses an integral section that is broken or knocked out after testing.
Can this flange be used for pressure testing?
The supplied product information states that testing should be limited to the intended test-plug use. Follow the manufacturer's approved DWV test procedure and applicable plumbing requirements.
Does the hub require solvent cement?
Yes. The hub connection is intended for compatible ABS solvent-cement installation.
Should the flange position be checked before cementing?
Yes. Dry-fit the flange first to confirm elevation, orientation, pipe engagement, and toilet mounting alignment.
Is this fitting intended for pressure piping?
No. This fitting is intended for non-pressure drain, waste, and vent 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.
What is the maximum operating temperature?
The supplied product information specifies applications where operating temperatures do not exceed 140°F.
What should I verify before ordering?
Confirm the hub size, toilet drain size, flange configuration, finished-floor requirements, threaded test-plug configuration, and compatibility with the intended ABS DWV system.
Important Ordering & Installation Notes
- This listing is for an ABS DWV Closet Flange with Threaded Test Plug and HUB connection.
- Verify the nominal hub size before ordering.
- Confirm compatibility with the intended toilet drain and ABS DWV piping.
- The fitting includes a removable threaded test plug.
- The threaded plug is intended as a temporary closure during installation and testing.
- Remove the test plug before the toilet is placed into service.
- The threaded plug can be removed and reinstalled during the installation process.
- Use the plug only for the manufacturer's intended DWV testing procedure.
- Do not use the fitting for pressure testing beyond its intended test-plug application.
- The hub accepts compatible ABS DWV pipe.
- The hub is intended for solvent-cement installation.
- Confirm flange elevation relative to the finished floor before installation.
- Confirm toilet mounting orientation before applying solvent cement.
- Dry-fit the flange and pipe before final assembly.
- Secure the flange according to applicable plumbing and installation requirements.
- Use an appropriate toilet sealing method for the final fixture installation.
- This fitting is intended for non-pressure drain, waste, and vent applications.
- Do not use for transporting compressed air or gas.
- 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 the ABS pipe into the hub.
- Maintain correct flange orientation while the solvent-cement joint sets.
- Remove the threaded test plug before completing the final toilet connection.
- Allow the completed joint to cure according to the solvent cement manufacturer's recommendations before testing or 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, test-plug instructions, and installation requirements.
- Follow applicable plumbing codes and manufacturer installation recommendations.