Product Overview

The Waterway Crystal Water 525 sq. ft. Cartridge Filter | 570-0525-07 is a high-capacity in-ground pool filtration system designed for excellent water clarity, efficient flow, and extended cleaning cycles. With 525 square feet of filtration area and a 150 GPM NSF-rated flow rate, this filter is ideal for larger residential pools and demanding filtration applications.

The Crystal Water series uses a proven four-cartridge design that provides a large dirt-holding capacity while making individual elements easier to remove and clean. Its oversized 2-1/2" internal plumbing helps reduce flow restriction and system noise while supporting both 2-1/2" and 2" plumbing installations.

Key Features

525 Square Feet of Filtration Area: Large-capacity filtration provides extended cleaning cycles and is especially well suited for larger pools or applications where reduced filter maintenance is desired.

150 GPM Flow Rate: The 570-0525-07 is rated for up to 150 gallons per minute, providing high-flow capability for modern pool circulation systems.

Quad-Cartridge Design: Uses four individual cartridge elements for efficient filtration, easier handling, and simplified cleaning compared with a single oversized element.

2-1/2" Internal Plumbing: Oversized internal plumbing minimizes hydraulic restriction, improves water flow, and can help reduce circulation-system noise.

2-1/2" Bulkhead Unions: Features large 2-1/2" valve bulkhead unions and includes 2" reducers for plumbing versatility.

Heavy-Duty Tank Construction: The filter body is manufactured from fiberglass-reinforced polypropylene for excellent strength, chemical resistance, and long service life.

Manual Air Relief Valve: A heavy-duty manual air relief valve allows trapped air to be safely released from the filter during startup and servicing.

Stainless-Steel Pressure Gauge: Includes a commercial-grade pressure gauge with Waterway's Start-Service indicator to make it easier to monitor filter condition and determine when servicing is required.

Benefits

525 sq. ft. filtration area

150 GPM NSF-rated flow

Four-cartridge filtration system

Longer cleaning cycles

Excellent dirt-holding capacity

2-1/2" internal plumbing

2-1/2" bulkhead unions

2" reducers included

Reduced hydraulic restriction

Fiberglass-reinforced polypropylene tank

Heavy-duty manual air relief valve

Stainless-steel pressure gauge

1-1/2" bottom clean-out port

NSF listed

Convertible to Crystal Water D.E. configuration by changing internal components

Designed, engineered, and manufactured in the USA

Specifications

What's Included

• Waterway Crystal Water 525 sq. ft. filter tank
• Four cartridge filter elements
• Upper and lower cartridge manifolds
• Heavy-duty manual air relief assembly
• Stainless-steel pressure gauge
• Three-segment tank clamp
• 2-1/2" bulkhead union fittings
• 2" plumbing reducers
• Drain assembly

Replacement Cartridges

The 525 sq. ft. Crystal Water filter uses four Waterway 817-0131B replacement cartridge elements.

Each cartridge is approximately:

• 7" outside diameter
• 32-1/16" long
• Approximately 131 sq. ft. of filtration area

Four cartridges are required for a complete replacement set.

Warranty & Compatibility

Installation Information

The Crystal Water 525 is suitable for new pool installations as well as replacement applications.

Its large 2-1/2" internal plumbing helps minimize restriction when paired with higher-flow variable-speed pool pumps. Included 2" reducers allow the filter to be integrated into common 2" pool plumbing systems.

The filter should be installed on a level equipment pad with sufficient vertical and surrounding clearance to remove the lid and cartridge elements for routine maintenance.

Confirm Before Ordering

Before ordering, confirm:

• Waterway part number 570-0525-07
• 525 sq. ft. filtration capacity
• 150 GPM maximum design flow
• Available equipment-pad space
• Plumbing size and orientation
• Adequate vertical clearance for cartridge removal

Do not select a replacement filter based only on tank appearance. Waterway Crystal Water cartridge filters are available in 325, 425, and 525 sq. ft. sizes, and replacement cartridges vary by model.

Warranty Information

The Waterway Crystal Water 525 is currently listed with a 1-year manufacturer warranty, subject to Waterway's current warranty terms, proper installation, application, maintenance, and operating conditions.

Customer-Facing Q&A

Q: How many square feet is the Waterway 570-0525-07?
A: It provides 525 square feet of total filtration area.

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

Q: What is the maximum flow rate?
A: The 525 sq. ft. Crystal Water filter has an NSF-rated flow rate of 150 GPM.

Q: What size plumbing does it use?
A: The filter features 2-1/2" internal plumbing and 2-1/2" bulkhead unions. Waterway includes 2" reducers for common 2" pool plumbing systems.

Q: What replacement cartridge fits the 525 sq. ft. model?
A: Waterway lists 817-0131B as the replacement cartridge. Four are required.

Q: Are the cartridges included with the complete filter?
A: Yes. The complete 570-0525-07 filter includes its four cartridge elements.

Q: How large of a pool can this filter handle?
A: At its 150 GPM rated flow, Waterway lists approximately 54,000 gallons at a 6-hour turnover and 72,000 gallons at an 8-hour turnover. Actual system sizing should also account for pump flow, plumbing, local codes, and application requirements.

Q: Is the filter NSF listed?
A: Yes. Waterway lists the Crystal Water Cartridge Filter as NSF listed.