4 inch x 3 inch PVC DWV Offset Toilet Flange

4" x 3" PVC Offset Closet Flange – DWV Fitting for Gravity Sanitary Systems

The 4" x 3" PVC Offset Closet Flange is designed for use in drain, waste, and vent (DWV) systems to connect water closets to a 3" or 4" drainage line. This flange incorporates an offset hub configuration to accommodate installations where the toilet rough-in needs to be shifted laterally by approximately 2 inches to meet alignment or clearance requirements.

Manufactured from rigid polyvinyl chloride (PVC), the flange is compatible with solvent-weld connections to Schedule 40 DWV piping and conforms to industry standards for above-ground and in-floor toilet flange applications. The integral bolt slots and face ring are designed to secure the water closet to the flange while maintaining code-compliant drainage flow.

Key Features

• ✅ Offset Design – Provides horizontal adjustment for closet placement relative to the waste stack.
• ✅ DWV Rated – Suitable for use in non-pressurized sanitary drainage systems.
• ✅ Schedule 40 PVC Construction – Resists chemical corrosion and structural deformation under normal use conditions.
• ✅ Connection Compatibility – Fits 4" over pipe or 3" inside pipe solvent weld fittings (verify local code).
• ✅ Code Compliance – Typically conforms to ASTM D2665 and CSA B181.2 standards for DWV fittings.

Installation Requirements

Install with appropriate PVC primer and solvent cement. Ensure flange is level and secured to the finished floor using corrosion-resistant screws. The outlet must align with the receiving hub or pipe with proper solvent bonding. Use of approved closet bolts and wax seal is required to form a watertight seal between the flange and toilet base.

Common Applications

Used in residential bathroom construction and renovation where existing drain location does not align with standard toilet rough-in dimensions. Common in slab-on-grade installations or framed floor assemblies requiring lateral toilet position adjustment.

Specification Note

This fitting is not designed for pressurized fluid systems and should not be used as a structural floor anchor. Always follow local plumbing codes regarding flange height above finished floor and allowable offset distance.

Technical Specifications

• Nominal Size: 4" x 3"
• Material: PVC (polyvinyl chloride)
• Connection Type: Hub (solvent weld), offset configuration
• Compliance: Typically meets ASTM D2665, CSA B181.2, and applicable UPC/IPC standards