1/2 in. SCH-40 PVC True Union Ball Check Valve Socket-Type ASTM D2466/F1970 One-Way Pro-Flow Control Fitting

247Garden 1/2-Inch PVC True Union Ball Check Valve – Socket-Type | Precision Flow Control for Small-Diameter Plumbing and Irrigation Systems

The 247Garden 1/2-Inch PVC True Union Ball Check Valve Socket-Type is engineered for small-diameter systems that require reliable one-way flow protection without compromising serviceability or chemical resistance. Whether you’re managing a compact hydroponic system, a metered irrigation setup, or a specialized water circulation line in a laboratory or aquarium, this high-performance check valve ensures dependable backflow prevention with minimal pressure loss and zero corrosion risk.

This true union design allows for quick installation and full-service disassembly without cutting or removing surrounding pipe. Designed from high-quality Schedule 40 PVC and EPDM elastomers, the 1/2" valve is optimized for both horizontal and vertical use in residential, commercial, and light industrial settings.

Product Specifications:

• Nominal Size: 1/2 inch

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

• Material: Rigid white Schedule 40 PVC, UPVC-PW

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

• Pressure Rating: Up to 150 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:

1. (2x) PVC Socket End Connectors: Each end of the valve includes a solvent-weld socket connection to integrate seamlessly into any 1/2" Schedule 40 PVC pipe system.

2. (2x) Union Nuts: These threaded rings secure the valve body to the end connectors and enable full disassembly of the valve without disturbing the main plumbing lines.

3. (1x) PVC Valve Body: The central housing component, reinforced with thick PVC walls to ensure structural integrity under pressure and long-term exposure to fluid movement.

4. (1x) Sealing Ball: A high-density, precision-molded PVC ball functions as the flow gate. When water flows forward, the ball lifts to allow flow. When water attempts to reverse, the ball drops into its seat to prevent backflow.

5. (1x) Gland (Ball Retainer): A stabilizing component that holds the ball in the correct position and ensures its travel path remains smooth and centered during operation.

6. (1x) Stem O-Ring: Located internally, this O-ring seals the stem area and prevents leakage through the center of the valve.

7. (1x) Main O-Ring Seal (EPDM): This durable O-ring seats around the ball when closed and seals the valve against reverse flow. Its EPDM formulation resists wear, UV degradation, and mild chemical corrosion.

How It Works:

The 247Garden 1/2" True Union Ball Check Valve operates using a gravity-assisted and pressure-driven mechanism:

• Normal Flow (Valve Open): When fluid flows in the intended direction (inlet to outlet), system pressure lifts the internal ball off its EPDM seat, creating an unobstructed path for the water to pass through.

• Reverse Flow (Valve Closed): If flow stops or reverses, the ball automatically falls back into the seated position, pressing tightly against the EPDM seal. This forms a barrier that prevents contaminated or unwanted water from re-entering the system.

• True Union Access: The union nuts allow the central body of the valve to be removed easily. Whether you need to inspect the ball, clean out debris, or replace the seals, you’ll never need to cut your plumbing or use special tools.

Why a True Union Ball Check Valve Is Superior:

The 1/2-inch True Union Ball Check Valve offers significant advantages over conventional spring or swing check valves, especially in compact, low-flow applications:

• Full Serviceability: Unlike glued check valves or one-piece units, true union construction allows for complete internal inspection and maintenance without altering your pipe system.

• Zero Metal Parts: The absence of springs or metal shafts means no rust, corrosion, or metallic contamination — ideal for aquaponics, reef tanks, chemical dosing lines, and hydroponics.

• Quiet, Gentle Operation: The soft-seating ball design prevents water hammer and operates silently without chattering or slamming.

• Small System Friendly: Perfectly scaled for half-inch piping where flow is limited and control precision is critical.

• Chemical Resistant: With EPDM seals and Schedule 40 PVC construction, the valve performs well with chlorinated water, fertilizers, diluted acids, and other non-aggressive chemicals.

Applications:

• Drip irrigation manifolds

• Hydroponic and aquaponic setups

• Laboratory fluid transfer systems

• Water purification and filter loops

• Aquarium water return and overflow systems

• Fertilizer injection lines

• Pump bypass loops and recirculation zones