4520058 Hydropool (FastFlow) Pre-filter for Signature 379-30

Original Hydropool FastFlow low-pressure prefilter (part 4520058), designed exclusively for the Signature 379-30 spa (30-inch height model). This is the short version of the FastFlow system: other 2024 and newer Signature models use the longer 4520043.

What the FastFlow Does

Installed upstream, this prefilter intercepts body oils, lotions, soaps, and floating debris before they reach your main filter. The result: water that stays clear longer, a main filter that clogs much more slowly, and a self-cleaning system that operates under better conditions.

Replace, Don't Wash

The FastFlow is a disposable filter. It is not rinsed or soaked: it is replaced when it becomes dirty or saturated, generally every 4 months depending on spa usage. Many owners keep two or three on hand so they are never caught off guard.

Specifications

• Diameter: 5 in (127 mm)
• Length: 9 in (229 mm)
• Top connection: grip handle
• Bottom connection: 1 1/2 in female SAE thread
• Type: disposable low-pressure prefilter
• Quantity: 1 filter

Compatibility

Hydropool Signature 379-30 spa (30 inches high) only. If your Signature is any other 2024 or newer model, you need the 4520043.

Please note: the FastFlow supports filtration; it does not replace regular spa maintenance—cleaning the main filter, balancing the water, and using sanitizer are still necessary.

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