6 Double Door Wafer Check Valve

Prevents backflow — automatically. 6 Check Valve allows flow in one direction and automatically closes to prevent reverse flow.

• Automatic backflow prevention — no manual operation required
• In-line design for easy installation in any pipe orientation
• Threaded (NPT) end connections

Overview

6 Double Door Wafer Check Valve is a check valve for preventing reverse flow in plumbing and piping systems. Check valves protect pumps, water heaters, boilers, and piping equipment from backflow and backpressure damage.

Common Uses

• Water supply systems — prevents backflow from downstream pressure
• Pump discharge lines — protects pump from reverse flow on shutdown
• Hot water heater and boiler system protection
• HVAC hydronic heating and cooling systems
• Industrial process fluid systems

Key Features

• Automatic operation — closes on flow reversal without external actuation
• Compact in-line design
• Steel/Iron body
• Threaded (NPT) connections

Specifications

Frequently Asked Questions

What is a check valve used for?

Check valves automatically prevent reverse flow in piping systems. They protect pumps, boilers, water heaters, and equipment from backflow and backpressure damage.

Swing check vs. spring check — which do I need?

Swing checks use a disc that swings open with flow — low pressure drop, good for high-flow lines. Spring checks close faster and work in any orientation. Use spring checks in vertical lines or where fast closure is needed.

Does a check valve require manual operation?

No. Check valves open and close automatically based on flow direction — no handle or actuator needed.

Can a check valve be installed vertically?

Swing check valves require horizontal installation or vertical flow-up. Spring-loaded and ball check valves work in any orientation.

Why Contractors Choose This Product

• Automatic backflow protection on pump discharge lines prevents reverse-spin damage on shutdown
• Compact in-line design fits tight mechanical spaces
• Proven construction for reliable long-term service
• PVFPro stocks the full size range so you get exactly what the job requires