Lesso America
PVC DWV Adapter Bushing (SPG x HUB)
- SKU:
- LP118
- Availability:
- Usually Ships Same Day
- Weight:
- 0.00 LBS
Description
PVC DWV Adapter Bushing (SPG x HUB)
PVC DWV Adapter Bushings provide a compact way to reduce or transition between different pipe sizes in non-pressurized drain, waste, and vent piping systems.
Featuring a spigot (SPG) connection on the outside and a smaller hub connection on the inside, this fitting installs into a compatible larger hub while accepting a smaller PVC DWV pipe. The compact configuration minimizes installation space while creating a secure solvent-welded transition between pipe sizes.
Product Highlights
- PVC DWV adapter bushing
- Spigot (SPG) x Hub connection
- Transitions between different nominal pipe sizes
- Spigot end fits into a compatible larger hub fitting
- Smaller hub accepts compatible PVC DWV pipe
- Compact reducing configuration
- Designed for non-pressurized drain, waste, and vent systems
- Solvent-weld installation
- Durable corrosion-resistant PVC construction
- Lightweight and easy to install
- Suitable for residential, commercial, and industrial DWV systems
Technical Specifications
| Product Type | DWV Adapter Bushing |
|---|---|
| Material | PVC |
| Connection Type | Spigot (SPG) x Hub |
| Configuration | Reducing / Transition |
| Spigot Connection | Fits Into Compatible Larger Hub |
| Hub Connection | Accepts Compatible Smaller PVC DWV Pipe |
| Joint Method | Solvent Weld |
| System Type | Drain, Waste & Vent (DWV) |
| Pressure Service | Non-Pressure |
| Typical Applications | Residential, Commercial, and Industrial DWV Piping Systems |
Connection Configuration
Outer Spigot
The SPG exterior is designed to fit directly into a compatible larger PVC hub fitting.
Reducing Body
The compact body transitions the connection from the larger hub size to a smaller pipe size without requiring a longer reducer fitting.
Inner Hub
The smaller hub accepts compatible PVC DWV pipe for a permanent solvent-weld connection.
Construction Details
The adapter bushing is manufactured from durable PVC for corrosion resistance and dependable long-term service in compatible non-pressure drainage systems.
The exterior spigot fits into a larger compatible hub while the internal hub receives a smaller PVC DWV pipe, creating a direct size transition within the fitting.
The compact design helps reduce installation space while maintaining a secure, permanent solvent-welded connection.
Why Choose an Adapter Bushing?
Compact Size Transition
- Transitions between different nominal pipe sizes
- Fits directly into a compatible larger hub
- Accepts smaller PVC DWV pipe
- Minimizes installation space
- Useful in confined piping layouts
PVC DWV Construction
- Corrosion-resistant material
- Resistant to many common plumbing chemicals
- Lightweight and easy to handle
- Designed for solvent-weld assembly
- Suitable for long-term non-pressure service
Typical Applications
Drain & Waste Systems
- Residential drainage piping
- Commercial waste systems
- Fixture drain piping
- Building drainage systems
- General DWV installations
Pipe Size Transitions
- Reducing hub connections
- Branch drainage systems
- Vertical and horizontal DWV piping
- Repair and retrofit work
- Space-sensitive piping layouts
Solvent-Weld Installation
Clean and prepare the compatible larger hub and adapter bushing spigot according to accepted PVC solvent-weld procedures. Apply compatible primer and solvent cement where required and fully seat the bushing into the larger hub.
Prepare the smaller PVC DWV pipe in the same manner and fully insert it into the bushing's hub connection. Allow all solvent-welded joints to cure according to the cement manufacturer's recommendations before placing the system into service.

Our plumbing specialists can help review your larger hub size, smaller pipe size, DWV application, and solvent-weld requirements before you order.
Email the GetPipe.com Team Visit Quick SupportFrequently Asked Questions
What is a PVC DWV adapter bushing?
An adapter bushing is a compact reducing fitting designed to transition from a larger hub connection to a smaller PVC DWV pipe size.
What does SPG mean?
SPG means spigot. The exterior spigot surface is designed to fit into a compatible larger hub fitting.
What does HUB mean?
Hub refers to the socket connection that accepts compatible PVC pipe for solvent-weld installation.
How does this fitting reduce pipe size?
The outer spigot installs into the larger hub while the smaller internal hub accepts the reduced-size PVC pipe.
How is the fitting installed?
Both the spigot-to-hub and smaller pipe-to-hub connections are installed using compatible PVC solvent-weld procedures.
Is this fitting intended for pressure piping?
No. This adapter bushing is intended for non-pressurized drain, waste, and vent applications.
What material is the fitting made from?
The adapter bushing is manufactured from durable, corrosion-resistant PVC.
Can this fitting connect two pipes of the same size?
No. This is a reducing or transition fitting intended to connect different nominal sizes.
Is an adapter bushing useful in tight spaces?
Yes. Its compact configuration can reduce the amount of installation space required compared with longer reducing fittings.
What should I verify before ordering?
Confirm both the larger spigot size and smaller hub size, along with compatibility with the existing PVC DWV fittings and pipe.
Important Ordering & Installation Notes
- This listing is for a PVC DWV Adapter Bushing with SPG x HUB connections.
- This is a reducing fitting intended to transition between two different nominal sizes.
- Verify both the larger spigot size and smaller hub size before ordering.
- The outer spigot is designed to fit into a compatible larger hub fitting.
- The inner hub accepts compatible smaller PVC DWV pipe.
- Designed for non-pressurized drain, waste, and vent applications.
- Use compatible PVC primer and solvent cement where required.
- Clean and prepare all mating surfaces before solvent welding.
- Fully seat the spigot into the larger hub during installation.
- Fully insert the smaller pipe into the bushing hub.
- Allow all solvent-weld joints to cure according to the cement manufacturer's instructions.
- Verify both sizes and reducing orientation before completing installation.
- Do not use this fitting for pressure applications.
- Check completed joints for proper assembly before normal use.
- Follow applicable plumbing codes and installation requirements.