Product Overview

The Waterway Crystal Water 325 sq. ft. Cartridge Filter | 570-0325-07 is a high-capacity in-ground pool filter designed to provide excellent water clarity, efficient circulation, and extended cleaning cycles. With 325 square feet of filtration area and a current manufacturer-listed 112 GPM NSF flow rate, this filter is an excellent choice for residential pools requiring dependable filtration with straightforward maintenance.

The Crystal Water series uses a proven four-cartridge design and oversized 2-1/2" internal plumbing to help reduce hydraulic restriction and system noise. Its chemical-resistant fiberglass-reinforced polypropylene tank provides durability for demanding outdoor pool environments.

Key Features

325 Sq. Ft. Filtration Area: Provides substantial dirt-holding capacity while extending the amount of time between cartridge cleanings.

Four-Cartridge Design: Uses four individual cartridge elements, making removal, cleaning, and replacement easier than handling one oversized filter element.

112 GPM NSF Flow Rate: Waterway currently rates the 325 sq. ft. model at 112 GPM, supporting efficient circulation for properly sized residential pool systems.

2-1/2" Internal Plumbing: Oversized internal plumbing minimizes restriction and helps improve water flow while reducing circulation-system noise.

2-1/2" Bulkhead Connections: Features large 2-1/2" plumbing connections with reducers for installation flexibility.

Heavy-Duty Tank Construction: Manufactured from chemical-resistant, glass-fiber-reinforced polypropylene for strength and long service life.

Commercial-Grade Pressure Gauge: Includes a stainless-steel pressure gauge with Waterway's Start-Service indicator to help identify when filter cleaning is required.

Benefits

325 sq. ft. filtration area

112 GPM NSF-rated flow

Four-cartridge filtration system

Longer cleaning cycles

Excellent dirt-holding capacity

2-1/2" internal plumbing

Reduced hydraulic restriction

Quiet system operation

Fiberglass-reinforced polypropylene tank

Heavy-duty manual air relief valve

Stainless-steel pressure gauge

1-1/2" bottom clean-out port

NSF listed

Suitable for new installations and replacement applications

Designed, engineered, and manufactured in the USA

Specifications

What's Included

• Waterway Crystal Water 325 sq. ft. filter tank
• Four cartridge filter elements
• Cartridge manifold system
• Manual air relief assembly
• Stainless-steel pressure gauge
• Tank clamp assembly
• Plumbing fittings
• Drain assembly

Replacement Cartridges

The Waterway Crystal Water 325 uses:

Replacement Cartridge Part Number: 817-0081B

Specifications per cartridge:

• Approximately 7" outside diameter
• Approximately 20" long
• Four cartridges required per filter

For a complete filter replacement set, order 4 x 817-0081B cartridges.

Warranty & Compatibility

Installation Information

The Crystal Water 325 is designed for both new pool installations and replacement applications.

Its oversized 2-1/2" internal plumbing helps minimize restriction and works especially well with modern variable-speed pool pumps. The filter should be installed on a solid, level equipment pad with adequate space above the tank for removing the lid and cartridge elements.

Confirm Before Ordering

Before purchasing, verify:

• Waterway part number 570-0325-07
• 325 sq. ft. filtration area
• Required system flow
• Plumbing size
• Available equipment-pad space
• Adequate vertical clearance for cartridge removal

Waterway also offers Crystal Water cartridge filters in 425 sq. ft. and 525 sq. ft. sizes. These models use different cartridge elements.

Do not select a replacement filter solely by tank appearance or outside dimensions.

Warranty Information

The Waterway Crystal Water 325 is covered according to Waterway's applicable manufacturer warranty terms. Warranty eligibility is subject to proper installation, operation, maintenance, and application.

Customer-Facing Q&A

Q: How large is the Waterway 570-0325-07?
A: It provides 325 square feet of total filtration area.

Q: What is the flow rate?
A: Waterway's current manufacturer listing rates the 325 sq. ft. model at 112 GPM.

Q: How many cartridges does it use?
A: It uses four cartridge elements.

Q: What replacement cartridges fit this filter?
A: The correct Waterway replacement cartridge is 817-0081B, with four required for a complete replacement set.

Q: Are cartridges included with the complete filter?
A: Yes. The complete 570-0325-07 filter includes the four cartridge elements.

Q: What size plumbing does it use?
A: The Crystal Water filter features 2-1/2" internal plumbing and 2-1/2" bulkhead connections.

Q: What pool turnover is it rated for?
A: Waterway lists approximately:

• 43,200 gallons at a 6-hour turnover
• 57,600 gallons at an 8-hour turnover

Actual system sizing should also consider pump flow, plumbing resistance, local codes, and the specific application.

Q: Is this filter NSF listed?
A: Yes. Waterway lists the Crystal Water cartridge-filter series as NSF listed.