PVC Foot Valves
Overview
PVC Foot Valves are essentially one-way (check) valves placed at the inlet (foot) of a suction pipe or hose in pumping systems. They include an integrated strainer (screen) to prevent debris from entering the line and damaging pumps. The valve mechanism ensures fluid flows in one direction—into the pump's suction line—but prevents reverse flow when the pump is stopped. This design helps maintain the prime in the suction line, avoiding the need for frequent re-priming and protecting equipment from damage caused by running dry.
Key Uses & Applications
Water Pumping Systems
Domestic, agricultural, and commercial water supply lines. Sump, well, and borehole pump setups where a reliable one-way valve is needed.
Irrigation & Sprinkler Lines
Prevents backflow of water into supply tanks or natural water sources. Maintains pipeline pressure and reduces pump cycling frequency.
Aquatic & Marine
Used in aquaculture or saltwater pumping where PVC's corrosion resistance is beneficial. Acts as a protective barrier against debris in open water intakes (ponds, lakes).
Industrial & Chemical Transfer
Mild chemical handling systems where PVC material compatibility is acceptable. Helps avoid chemical backflow into tanks or processing equipment.
Product Highlights
Corrosion-Resistant PVC Construction
Inherently resists rust and scale buildup. Suitable for fresh water, saltwater, and many mild chemicals.
Integrated Strainer (Screen)
Filters out debris, leaves, and other particulates. Protects pumps from clogging or impeller damage.
Low Head Loss
Foot valves are designed with minimal flow restriction. Reduces energy consumption by lowering pump workload.
Easy Installation & Maintenance
Threaded or socket (solvent weld) connections to match regional standards. Disassembly of screen/valve elements allows for quick cleaning or replacement.
Variety of Sizes
Ranges from 1/2" to 4" (and beyond) to accommodate different flow rates and application needs. Pressure ratings typically span PN6/PN10, depending on valve diameter and design.
Technical Specifications
| Valve Type | Foot Valve (Check Valve + Strainer) |
| Material | PVC body, typically with EPDM or Viton seals |
| Connection Ends | Socket (solvent weld) or Threaded (NPT/BSPT) |
| Size Range | ~½" up to 4" (larger on request) |
| Working Pressure | PN6 / PN10 (6–10 bar) @ room temperature |
| Temperature Range | 0°C to ~60°C (32°F to 140°F), PVC softens above 60°C |
| Screen | Plastic or stainless-steel mesh (depending on model) |
| Flow Orientation | One-way: fluid enters from strainer side, exiting through valve |
| Seat Type | Spring-loaded or flapper-style disc |
How it Works
Suction Lift
When the pump activates, water is drawn through the screen, pushing open the valve (flapper or ball) inside the foot valve. The pump's suction overcomes the valve's closing mechanism (gravity or spring).
Check Valve Action
When the pump shuts off, the valve closes promptly—driven by spring tension or backpressure. This closure traps water in the suction line, keeping the pump primed and preventing backflow.
Filtration
The strainer (screen) around the foot valve prevents large debris from entering the line. Regular cleaning of the screen ensures sustained water flow and pump protection.
Installation & Usage Tips
Placement
Install at the lowest point of the suction line, fully submerged for consistent priming. Keep adequate clearance around the screen so debris does not collect excessively.
Orientation
Ensure the valve is placed vertically upright with the strainer side down for proper operation.
Piping Connections
Threaded Models: Apply PTFE tape or thread sealant on male threads. Avoid overtightening to prevent cracking. Solvent Weld (Socket): Use PVC primer and cement per manufacturer instructions, ensuring full fusion and proper cure time.
Support & Alignment
Reduce pipe strain on the valve by adding pipe clamps or supports. Keep suction piping straight or with minimal bends for optimal flow.
Maintenance
Periodically remove and clean the strainer to avoid flow restriction. Inspect seals or flapper discs for wear; replace if the valve no longer holds prime.
Features & Benefits
Corrosion Resistance & Long Life
PVC construction withstands standard pumping conditions and resists most waterborne chemicals.
Energy Savings
Retains prime in the suction line, reducing frequent pump starts. Minimizes water hammer or flow surges upon pump shutdown.
Protects Pump Equipment
Prevents reverse flow that can damage impellers or cause water contamination. Strainer screens out harmful particulates.
Low Maintenance
Simple mechanical design requires only occasional cleaning of the strainer. No external power or controls are needed.
Cost-Effective
PVC valves typically cost less than metal counterparts. Easy replacement or component swap saves on overall maintenance expenses.