2" PVC Backflow Water Valve

Sioux Chief 2" PVC Backwater Valve – Gravity Flow Backflow Protection for Drainage Systems

The Sioux Chief 2" PVC Backwater Valve is engineered to protect drainage systems from reverse flow conditions. Designed specifically for gravity flow sanitary and storm drainage applications, this valve provides critical protection against sewer backups, helping prevent water damage and contamination in residential and light commercial systems.

Product Highlights

• Backwater Protection – Prevents backflow in horizontal drain lines, safeguarding structures from sewage intrusion during overload or flood conditions.
• Durable PVC Body – Constructed from impact-resistant PVC for use in underground installations or exposed piping where corrosion resistance is essential.
• Threaded Cleanout Access – Integrated top-access cover allows for quick inspection and servicing without removing the valve from the line.
• Sealing Flapper – Elastomer gasketed flapper closes under reverse flow conditions, maintaining a tight seal to prevent leakage.
• Locator Magnet Included – Molded-in magnetic strip enables easy underground detection for future maintenance.

Technical Specifications

• Size: 2” nominal
• Material: PVC (Polyvinyl Chloride)
• Connection: Solvent weld socket ends
• Working Pressure: Gravity flow (not rated for pressurized lines)
• Listing: UPC / IAPMO listed
• Country of Origin: USA

Installation Considerations

This valve is intended for horizontal installation in non-pressurized drain piping. Proper alignment is critical to ensure the flapper closes freely without obstruction. The solvent weld ends must be fully cleaned and primed before cementing to avoid leaks. Access to the valve should be maintained for future inspection and cleaning through the threaded top port.

Contractor Applications

Ideal for new construction or retrofit projects in flood-prone areas or below-grade installations, the Sioux Chief backwater valve provides a reliable method for meeting code-mandated protection requirements in sanitary or storm sewer connections. A dependable component in any preventative plumbing design.