4520043 Disposable Pre-Filter (FastFlow) Hydropool for Signature 2024+ (FC1225, FC-1225, PP1258)

Original Hydropool FastFlow low-pressure prefilter (part 4520043) — the yellow filter for 2024 and newer Hydropool Signature spas. It is the second filter in the compartment, the one that works upstream of the main filter.

What the FastFlow does

It intercepts body oils, lotions, soaps, and floating debris before they reach your main filter. Your water stays clear longer, your main filter gets clogged much less quickly, and your self-cleaning system works under better conditions. It is the least expensive part of your spa, and the one that protects all the others.

Replace, don't wash

The FastFlow is a disposable filter. It is not rinsed or soaked: it is replaced when it is dirty or saturated, generally every 4 months depending on spa usage. Many owners keep two or three on hand.

Specifications

• Diameter: 5 in (127 mm)
• Length: 13 3/16 in (335 mm)
• Top connection: grip handle
• Bottom connection: 1 1/2 in female SAE thread
• Color: yellow
• Type: disposable low-pressure prefilter
• Quantity: 1 filter

Compatibility

Hydropool Signature 2024 and newer spas. Exception: the Signature 379-30 (30-inch height model) uses a shorter version, part 4520058.

Note: the FastFlow supports filtration; it does not replace the regular maintenance of your spa — cleaning the main filter, balancing the water, and sanitizing remain necessary.

Unsure about your model? Our Gatineau team will confirm the correct part for you.