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Prelude Filter Bags

Pall Water's Prelude™ pretreatment solutions are trusted to protect your membranes, your systems, and your investments. Bags are available in a wide range materials and can handle any many filtration applications.

Less Bag Changes & Less Waste

Setting the Bar for Filter Bag Quality

Discover how our filter bags are the optimal solution to reduce waste volume and bag changes and achieve your water treatment needs.


Capable of withstanding higher solid loading, our filter bags have a long performance life when compared to similar products. Our bag filters are trusted to provide reliable filtration in a number of municipal and industrial applications around the globe.


Products & Features


Material Compatibility

Pall offers an array of materials including polypropylene to polyester to select based upon your incoming water characteristics thus increasing the performance of your system.


Flexibility With Micron Rating and Sizes

Filter bags are available in multiple sizes and micron ratings. These combined aspects will result in an ideal solution to achieve flow, efficiencies and product desired.


Customized Configurations Increase Security

From traditional sewn to Polyweld® welded seam, to seamless filter bag configurations combined with PolyLoc® flange, the product quality is unmatched.


Products Available:

  • Felt Filter Bags
  • Polymicro® Filter Bags
  • Seamless-Absolute Filter bags
  • Mesh Filter Bags
  • Bag Filter Housings
  • And More...



  • Drinking Water
  • Wastewater
  • Desalination
  • Drainage Water / Leachate
  • Utility Water
  • And More... 


Fill out this form for fast and easy ordering or scroll down to view our most popular products. Details on NSF Certification.


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Products Certified for Drinking Water Applications

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Contact us for a quote and lead times today.
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Proven & Certified

A number of our trusted pretreatment solutions are NSF / ANSI 61 & ACS certified for compliance in Drinking Water applications. Click to learn more.

Explore Our Popular Filter Bags

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Click to see product details or request a quote above.
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Pall FSI Seamless-Absolute Rated Bag Filters

Precise Particle Retention Bag Filters

  • Seamless construction offers unequaled benefit of eliminating fluid bypass
  • Absolute rated (98%) from 3μm – 100μm
  • Microfiber grated pore design provides lower initial drop
  • Can be incinerated for easy disposal

Pall FSI Polymicro® Bag Filters

High Filtration Efficiency Bag Filters

  • Proprietary polypropylene, triple lay construction for clearer results
  • Outer cover prevents fiber migration to reduce waste
  • High void volume means longer service life, higher contaminate loading, and reduced waste loads
  • PolyLoc® ring creates a hermetic seal within a vessel housing prevent liquid bypass

Pall FSI Felt Bag Filters

High Solids Holding Capacity Bag Filters

  • Used in vessel or open filtration systems
  • Available as conventional sewn bags or welded bags
  • Multiple materials of construction to meet the quality of intake water
  • Heavy Duty & Extended life bags offer the high solids holding capacity to provide long service life

Pall FSI Mesh Bag Filters

High Tensile Strength Bag Filters

  • Constructed using woven or knitted fabric
  • Available in monofilament and multifilament mesh for broad chemical compatibility
  • Silicone-free to prevent cratering for a better surface finish
  • Wide range of micron ratings with plastic or metal rings for versatility

Case Study: Pall Water Filter Bags at the University of San Diego, CA


"Preventing Sediment Buildup and Malfunctioning HVAC Systems On Campus with Filters"


Pall Water bag filters help the University of San Diego with HVAC functionality. Our solutions reduce maintenance needs, enable proactive capacity assessment, and save on energy costs.