Stenner MCINJ38 Santoprene Replacement Injection Duckbill Check Valve - 3/8"

This Santoprene injection duckbill check valve is a direct replacement part engineered for reliable backflow prevention in chemical metering and dosing systems. Molded Santoprene construction resists common pool and spa chemicals and delivers long service life with repeated flex cycles.

• Material: Santoprene elastomer for chemical resistance and durability
• Connection: Designed for 3/8 inch tubing and fittings
• Function: One way duckbill check valve prevents backflow and reduces siphoning in metering pumps and injectors
• Compatibility: OEM replacement for Stenner dosing pumps and compatible with most inline chemical metering pumps using 3/8 inch tubing
• Package: Single replacement valve included

Applications include pool and spa chemical feed, water treatment, agricultural dosing, and light industrial chemical injection. The flexible duckbill design delivers consistent forward flow while sealing against reverse flow to protect pumps and system plumbing.

Installation and maintenance

• Install with the duckbill outlet facing downstream in the flow direction.
• Ensure tubing is cut square and fully seated for a leak free connection.
• Inspect periodically for cracking, deformation, or chemical degradation and replace when visible wear is present.

Notes Replace using OEM part number MCINJ38 for guaranteed fit. For extended performance avoid exposure to temperatures and chemicals outside manufacturer recommendations and follow pump manufacturer service intervals.

This product description provides the key specifications and installation guidance needed to confirm fit and performance before purchase.