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Waterway

Crystal Water / Aqua Clean 325–525

In-Ground Cartridge Filter

Waterway Crystal Water and Aqua Clean four-cartridge filter family with 325, 425, and 525 square-foot options, manual design flows up to 150 GPM, and a 50 PSI maximum working pressure.

Waterway Crystal Water and Aqua Clean Cartridge Filter System

Specifications

Filtration
Filter TypeFour-element cartridge filter
Filter Area570-0325: 325 sq. ft.; 570-0425: 425 sq. ft.; 570-0525: 525 sq. ft.
Design Flow Rate570-0325: 112 GPM; 570-0425 and 570-0525: 150 GPM
Maximum Working Pressure50 PSI (3.45 bar)
Maximum Head Loss4.1 PSI at 150 GPM
Cleaning Pressure NoteClean the cartridges when pressure rises 8–10 PSI above the recorded clean starting pressure
Physical
Service Clearance6 in. side clearance; 11, 17, or 23 in. above for the 325, 425, or 525 sq. ft. model
Installation SurfaceLevel concrete slab, very firm ground, or equivalent in a well-drained location
Clamp Torque216 in-lb with a 3/4 in. socket and torque wrench during tank-lid reassembly

Pros & Cons

Pros

  • Three four-cartridge sizes cover 325 to 525 square feet.
  • The 425 and 525 square-foot models have a documented 150 GPM design flow.
  • The manual identifies the exact replacement element for each size.

Watchouts

  • All four elements must be removed and cleaned as a set.
  • Tank reassembly requires the exact clamp sequence and 216 in-lb torque.
  • The pressurized tank must be fully vented and depressurized before service.

Error Codes & Troubleshooting

Pressure +8–10 PSI
Clean all four cartridges when pressure reaches the service threshold above clean pressure.
Flow Diminishes
Accumulated dirt increases resistance; compare the gauge with the recorded clean starting pressure.
Damaged Cartridge
Replace any torn, cracked, or damaged element rather than returning it to service.

Replacement Parts

PartPart NumberDescription
Pressure Relief Valve Assembly550-6730Heavy-duty air-relief and gauge assembly.
Pressure Gauge830-4000SSGauge listed within the pressure-relief assembly.
Clamp Assembly550-6300Tank clamp assembly.
325 sq. ft. Cartridge817-008181.25 sq. ft. element; four are used in the 325 sq. ft. filter.
425 sq. ft. Cartridge817-0106106.25 sq. ft. element; four are used in the 425 sq. ft. filter.
525 sq. ft. Cartridge817-0131131.25 sq. ft. element; four are used in the 525 sq. ft. filter.
Cartridge Manifold Assembly550-4300Upper manifold for the four cartridges.
Main Body O-Ring805-0000Tank-body sealing O-ring.

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