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Harmsco BetterFilter BF850FL 850 sq ft Commercial Cartridge Pool Filter, 4" Flange – BF850FL

BF850FL

Save $265.85 on this order paying by wire

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In stock. Usually ships in 1–2 business days.

Key Specs

850 sq ft, 318 GPM stainless cartridge filter, 4" flange, NSF/ANSI 50

Filter area
850 sq ft
Max flow
318 GPM
Connection
4" flange
Listing
NSF/ANSI 50
Warranty
10 years pro-rated

The Harmsco BetterFilter BF850FL puts 850 sq ft of Hurricane TropiClean cartridge area into one 304L stainless steel housing with a 4" flanged connection, rated to 318 GPM. It is NSF/ANSI 50 certified for commercial pool and spa use.

Key features

  • 850 sq ft, 318 GPM max
  • 5 x HC/170TC Hurricane TropiClean cartridges
  • Low-carbon T-304L electropolished stainless (T-316L optional from Harmsco), 50 PSI max
  • 4" flanged inlet/outlet
  • 46" tall, 30" x 30" floor space, 85" service height

Before you order

Confirm your design flow, the 30" x 30" pad space and 85" overhead clearance for cartridge service. Ships by freight (260 lb).

Key Features

  • 850 sq ft, 318 GPM
  • 5 Hurricane TropiClean cartridges
  • T-304L electropolished stainless
  • 4" flanged connections
  • NSF/ANSI 50 certified

Who It's For

  • Commercial and public pools up to 114,750 gal (NSF rating)

What's Included

  • BF850FL housing
  • 5 x HC/170TC cartridges

About the Brand

Harmsco was founded in 1958 in West Palm Beach, Florida, and credits John F. Harms with pioneering the first pleated polyester filter cartridges. Harmsco Filtration Products designs and makes stainless-steel filter housings and cartridges for pool and spa, commercial and industrial water filtration.

Performance

Filter area
850 sq ft
Max flow
318 GPM
Max NSF pool size
114,750 gal

Plumbing

Connection
4" flanged

General

Filter type
Cartridge
Cartridges
5 x HC/170TC
Housing
T-304L stainless, electropolished
Max pressure
50 PSI
Application
Commercial

Dimensions

Height / floor space / service height
46 in / 30 x 30 in / 85 in
Shipping weight
260 lb

Certifications

Certifications
NSF/ANSI 50

Warranty

Warranty
10 years pro-rated

Harmsco lists a ten-year pro-rated warranty on the BF850FL housing.

  • Free standard shipping on most orders in the lower 48
  • Authorized dealer, full manufacturer warranty
  • Price match on identical in-stock items
  • Real pool experts on the phone: (817) 587-4397
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Financing

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Frequently Asked Questions

Use our Request a Quote page and include the product, configuration, intended use, and delivery ZIP code. We reply within 12 business hours. You can also call or text us at (817) 587-4397.

Yes — pay by wire transfer or Zelle and save 5% on your entire order. Those methods carry no card processing fees, so we pass the savings straight to you.

Yes, on most orders. Free standard shipping is included on most orders delivered within the United States. Some oversized or freight-only items are quoted for your delivery address — the product page will tell you before you buy.

Yes. Orders under $1,000 split into 4 interest-free payments with Shop Pay. Larger orders — most of our equipment — split into 3, 6, 12, 18, or 24 monthly payments at 0%–36% APR depending on your credit. Checking your options at checkout does not affect your credit score.

Most eligible products have a 30-calendar-day return-request window. Written return authorization is required — do not ship a return before approval. Return freight on oversized items is at the buyer's cost and can be substantial.

Coverage follows the applicable manufacturer's warranty. We are an authorized dealer for the brands we carry and can help route eligible warranty claims. Contact us with your order number, product details, and photos of the issue.

Yes. We match the total delivered price for an identical in-stock item from an authorized U.S. retailer, before purchase or within 7 days after. Call or text (817) 587-4397 or email hello@pooldirectsupply.com to request a match.