4 in. SCH-80 PVC True Union Ball Check Valve Socket-Type ASTM D2466/F1970 One-Way Flow Control

The 247Garden 4-Inch Schedule-80 PVC True Union Ball Check Valve Socket-Type is designed for large-scale fluid systems requiring robust backflow prevention, superior chemical resistance, and long-term dependability. Engineered for industrial processing, agricultural irrigation mains, hydroponic reservoirs, and high-volume water treatment systems, this heavy-duty valve guarantees reliable one-way flow control with minimal pressure drop and complete corrosion resistance.

Its true union configuration allows for fast installation, full service access, and tool-free disassembly—no pipe cutting required. Built from industrial-grade Schedule 80 PVC and EPDM elastomers, the 4-inch valve delivers exceptional pressure performance, durability, and chemical compatibility, making it ideal for municipal, agricultural, and industrial environments where system reliability is critical.

Product Specifications

• Nominal Size: 4 inch

• Connection Type: Socket/Slip (solvent-weld)

• Material: Gray Schedule 80 PVC (UPVC-PW)

• Seal Material: EPDM (ethylene propylene diene monomer) for broad chemical compatibility

• Pressure Rating: Up to 235 PSI (non-shock at 73°F)

• Temperature Range: 33°F to 140°F

• Installation Orientation: Vertical preferred; horizontal acceptable with adequate pressure and flow

9-Piece Assembly Breakdown

• (2x) Schedule 80 PVC Socket End Connectors – solvent-weld ends for secure pipe integration

• (2x) Union Nuts – hold the valve body firmly while allowing full-service removal

• (1x) PVC Valve Body – reinforced Schedule 80 housing for high-pressure stability and long service life

• (1x) Sealing Ball – precision-molded PVC ball lifts during forward flow and seals during reverse flow

• (1x) Gland (Ball Retainer) – stabilizes the ball for smooth motion and accurate seating

• (1x) Stem O-Ring – provides a watertight seal around the stem area

• (1x) Main O-Ring Seal (EPDM) – ensures leak-proof operation and resists UV exposure and mild chemicals

How It Works

This valve functions through a gravity-assisted, pressure-driven ball mechanism:

• Forward Flow (Open): System pressure lifts the internal ball, allowing water to pass freely through the valve.

• Reverse Flow (Closed): When flow stops or reverses, the ball falls back into its EPDM seat, creating a tight seal that prevents backflow.

True Union Access: The union-style ends allow the valve body to be easily removed for inspection, cleaning, or seal replacement without cutting the pipe or disturbing the system.

Why Choose a True Union Ball Check Valve?

• Full Serviceability: Easy disassembly and maintenance without pipeline disruption.

• Non-Metal Construction: 100% corrosion-resistant—ideal for pure water or chemical use.

• Quiet Performance: Soft-seating ball minimizes vibration, water hammer, and flow noise.

• Heavy-Duty Design: Schedule 80 PVC body withstands higher pressures and harsher environments than Schedule 40.

• Chemical Compatibility: EPDM seals resist fertilizers, chlorinated water, and mild acids, ensuring long-term reliability.

Common Applications

• Industrial water circulation and recirculation systems

• Agricultural irrigation mains and pump discharge lines

• Hydroponic and aquaponic large-volume nutrient systems

• Municipal and commercial water treatment facilities

• Aquarium, aquaculture, and filtration return systems

• Fertilizer injection and chemical dosing systems

• Pump bypass, discharge, and high-flow loops