Strainrite

The Strainrite Companies is a family-owned manufacturer of liquid filtration products headquartered in Auburn, Maine. Incorporated in 1978, the company has over 47 years of experience designing and producing a comprehensive range of filtration solutions, establishing itself as an industry leader with a global customer base spanning the United States, Europe, and Asia. Its product portfolio addresses the filtration needs of a diverse array of industries, including paints, coatings, inks, adhesives, beverages, biopharmaceuticals, electronics, automotive, plating, and chemicals.

The company's product lineup includes filter bags, filter cartridges, and filter vessels and housings. Its heritage in filter bag technology is foundational — the company's founder, John H. Lapoint Jr., was instrumental in conceiving, perfecting, and commercializing the original filter bag. Today, Strainrite continues to manufacture classic and innovative filter bags engineered to high-quality standards. Its Clarity Cartridge line includes Membrane Cartridge Filters, Pleated Depth Cartridge Filters, and Large Diameter Pleated Cartridge Filters, designed for sterilization and microorganism separation with consistent, repeatable effluent quality.

Strainrite also offers a full range of filter vessels and housings, including Single Bag Housings, Multi Bag Housings, and Manifold Bag Housing Systems, available in standard and custom configurations. Its low-flow SRL vessels and industrial-grade SRID vessels represent advanced filtration technology with numerous integrated features. The MADD-MAXX Large Diameter Hybrid filter line is engineered for critical high-purity applications, combining the high dirt-holding capacity of bag filtration with the precision performance of cartridge filtration in an inside-out flow design that minimizes downstream contamination risk.

All manufacturing is conducted in silicone-free, ISO 9001 accredited facilities, and many products are manufactured in accordance with Good Manufacturing Practices (GMP). This commitment to quality and compliance positions Strainrite as a trusted supplier for regulated industries requiring stringent process control. The company's go-to-market approach is consultative, with experienced field sales professionals and distributors conducting comprehensive needs assessments to identify the optimal filtration solution for each client's specific application. New product development is driven by direct customer-supplier collaboration, supporting long-term strategic relationships across its served industries.