4 inch x 4 inch x 3 inch PVC DWV Reducing Wye Plastic x Plastic x Plastic

4 inch x 3 inch PVC DWV Reducing Wye – Transition Fitting for Sanitary Drainage Systems

The 4 inch x 3 inch PVC DWV Reducing Wye is a solvent-weld fitting used in gravity-fed drain, waste, and vent (DWV) systems. It allows for a smooth, angled transition from a 4-inch main line to a 3-inch branch line while maintaining directional flow and minimizing flow resistance.

This reducing wye is manufactured from rigid, high-impact PVC and meets dimensional tolerances outlined in ASTM standards for non-pressurized sanitary systems. Its long-sweep design and solvent-weld socket ends provide secure, permanent connections and improve hydraulic performance at the junction of differing pipe sizes.

• ✅ Reducing Wye Configuration – Provides a gradual 45° branch connection from a 4 inch line to a 3 inch line, preserving system flow characteristics.
• ✅ Schedule 40 PVC – Resists corrosion and degradation from common wastewater chemicals and operating conditions.
• ✅ Solvent Weld Socket Ends – Designed for use with standard 4 inch and 3 inch DWV pipe using primer and solvent cement.

Technical Specifications

• Material: PVC (Polyvinyl Chloride), Schedule 40
• Inlet: 4 inch Socket
• Branch: 3 inch Socket at 45°
• Application: Drain, Waste, and Vent (DWV) Systems
• Standards: ASTM D2665, D3311

Typical Applications

This reducing wye is typically used in residential and commercial DWV systems to join a smaller branch line into a larger main, such as connecting fixture branches to horizontal drainage piping or vertical stacks. The angled configuration allows for smooth flow redirection while maintaining downstream velocity.

Material Advantages

PVC is widely used in DWV applications due to its chemical resistance, low weight, and smooth internal surface, which minimizes solids accumulation and friction losses. Unlike metal fittings, it does not corrode or scale over time.

The 4 inch x 3 inch PVC DWV Reducing Wye is a dependable fitting for installations requiring a size reduction and angular redirection within sanitary drainage systems. It ensures durable, code-compliant pipe transitions with minimal hydraulic disruption when properly installed using industry-standard bonding techniques.