1-1/4 in. SCH-80 PVC True Union Ball Check Valve Socket-Type ASTM D2466/F1970 One-Way Flow Control

The 247Garden 1-1/4-Inch Schedule-80 PVC True Union Ball Check Valve Socket-Type is engineered for medium-diameter piping systems that demand reliable backflow prevention, chemical resistance, and long-term serviceability. Designed to perform in hydroponic mainlines, irrigation control loops, laboratory circulation systems, or aquarium return setups, this heavy-duty valve ensures dependable one-way flow protection with minimal pressure drop and zero risk of corrosion.

Featuring a true union design, this valve allows for quick installation and full disassembly without cutting into the pipe—making inspection, cleaning, or seal replacement simple and efficient. Constructed from industrial-grade Schedule 80 PVC and EPDM elastomers, the 1-1/4-inch ball check valve is rated for higher pressure than standard Schedule 40 models, providing durability and confidence in residential, commercial, and light industrial applications.

Product Specifications

• Nominal Size: 1-1/4 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 seamless pipe integration

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

• (1x) PVC Valve Body – reinforced Schedule 80 housing for added strength and longevity

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

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

• (1x) Stem O-Ring – seals the stem area to prevent internal leakage

• (1x) Main O-Ring Seal (EPDM) – forms a reliable barrier against backflow, UV wear, and mild chemical corrosion

How It Works

The valve uses a gravity-assisted, pressure-driven ball mechanism:

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

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

True Union Access: Union ends make servicing straightforward—inspect the ball, clean out debris, or replace seals without cutting pipe or using specialized tools.

Why Choose a True Union Ball Check Valve?

• Full Serviceability: Easy disassembly and maintenance without disrupting the system.

• Zero Metal Parts: No springs or shafts to corrode, ensuring water purity and long-lasting performance.

• Quiet Operation: Soft-seating ball prevents water hammer and noisy chattering.

• High-Strength Construction: Schedule 80 PVC body provides superior pressure resistance compared to Schedule 40.

• Chemical Compatibility: EPDM seals withstand fertilizers, chlorinated water, and mild acids.

Common Applications

• Drip irrigation manifolds

• Hydroponic and aquaponic systems

• Laboratory and industrial fluid transfer lines

• Water purification and circulation loops

• Aquarium water return systems

• Fertilizer and chemical dosing lines

• Pump bypass and recirculation systems