McDonnell & Miller 340700 Basket Assembly

The McDonnell & Miller 340700, also known by model number SA37-38, is a critical strainer basket assembly designed for high-performance fluid filtration in low-pressure steam and hot water systems. This industrial-grade component is specifically engineered for compatibility with McDonnell & Miller Series 51S, Series 53, and 851S make-up water feeders. Measuring 3-1/8 inches in length, the assembly features a durable mesh designed to trap scale, rust, and pipe sediment before it can infiltrate the valve housing. By maintaining a clean flow, this replacement strainer basket prevents poppet sticking and ensures the reliable operation of the mechanical feeder mechanism. Regular inspection of the boiler water feeder strainer is essential for preventing flooded boilers or dry-fire conditions caused by restricted water flow. This assembly includes the necessary gasket to ensure a robust, leak-free seal upon installation. For contractors performing boiler maintenance, the SA37-38 provides a direct-fit solution to restore the filtration integrity of the 51S and 53 Series controls.

• Precision Compatibility: Designed exclusively for McDonnell & Miller Series 51S, 51S-2, 53, 53-2, and 851S units.
• Debris Protection: Effectively captures particulates to protect the sensitive valve assembly and poppet.
• System Reliability: Minimizes the risk of feeder failure or valve leakage caused by sediment buildup.
• Direct Replacement: Includes the 3-inch 1/8-inch basket and the required seating gasket for a complete service.
• Rugged Construction: Built with high-quality materials to withstand the thermal and chemical demands of hydronic systems.

Which water feeders use the SA37-38 strainer?
This basket is designed for the 51S and 53 Series mechanical feeders, as well as the 851S make-up water feeders. It is not interchangeable with the 47 or 247 series baskets.

Does this assembly include the gasket?
Yes, the 340700 assembly is supplied with the gasket required to seal the strainer housing after replacement.

When should the strainer basket be replaced versus cleaned?
If the mesh is torn, corroded, or if calcium deposits cannot be fully removed without damaging the basket structure, a full replacement is required to maintain system safety.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.