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Please note that the “Keystone” brand has recently been acquired by Porvair Filtration Group, Inc., and is no longer owned by CECO Environmental. All Keystone-related content on these web pages should be read accordingly until it can be transitioned to Porvair’s site. For more information about Porvair Filtration Group, go to www.porvairfiltration.com/keystonefilter

Our Keystone Filter brand is a leading provider of filtration solutions, offering an extensive selection of technologies that are adaptable and scalable for a broad range of filtration and purification applications. Our filters, cartridges, and filter housings are designed for industrial, commercial and residential filtration. Keystone provides products to many high end customers including the United States military and the nuclear and aircraft industries.

We are also a major supplier to original equipment manufacturers and provide innovative solutions through development of new filtration products for difficult industrial air and liquid applications and potable water applications.

Industrial Filters

Keystone Filter manufactures a wide range of air, liquid, and gas filtration products for industrial and commercial markets including industrial high purity, food and beverage, printing, liquid recycling and process water treatment. These products include industrial liquid filters, filter housings and replacement filter cartridges.

Drinking Water Filters

As a leading manufacturer of home drinking water filters and solutions, Keystone Filter offers a complete line of standard filters, giant filters and whole house filters plus replacement cartridges, parts and accessories.

Custom Pleating and Custom Cartridges

Keystone Filter offers unique capabilities for design and production of custom filtration products. Our pleated filter media and cartridges help assure the highest possible purity levels for air, liquids and gases in critical applications found in chemical and pharmaceutical research and processing, electronic device production, food processing, nuclear power generation and many others. Our special ability to pleat a wide variety of media materials in many different configurations has brought us to the vanguard of this technology.

Click here to order Residential Products.
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Primary Products and Solutions

Industrial Pleated Filter Categories

Industrial Bag Filters

High Performance Carbon Black Taste & Odor Filter Cartridges

Industrial Filter Housings


Residential Drinking Water Filters


Telford, PA, USA: 215-822-1963
Toll Free: 800-822-1963
Email: filters@keystonefilter.com

Contact Us


Telford, PA, USA
Keystone Filter
700 Emlen Way
Telford, PA 18969

Toll Free: 800-822-1963
Phone: 215-822-1963
Fax: 215-997-1839