Unicel C-9481 Replacement Filter for Jacuzzi Sherlock 120 | 120 Sq. Ft.

Name: Unicel C-9481 Replacement Filter for Jacuzzi Sherlock 120 | 120 Sq. Ft.
Brand: Unicel
SKU: UNFC9481
Price: 117.46 USD
Availability: InStock

$117.46 USD

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Overview

The Unicel C-9481 is a pleated polyester cartridge filter element engineered for medium-to-large residential and light commercial pool installations, delivering 120 sq ft of filtration area via a high-pleat-count Reemay nonwoven polyester media pack. The element is configured with ABS injection-molded end caps — closed bottom with center locator boss, open top with handle-style grip — supported on a structural PVC core for axial rigidity under sustained operating pressure. Nominal filtration efficiency is rated in the 20-micron range under standard test conditions, with continuous service temperature rated to 104°F and operating pressures to 50 PSI. The 120 sq ft media area is sized to match the flow demand of the Jacuzzi Sherlock 120 housing across its full pump head curve, supporting extended service intervals between cleanings.

Service interval recommendation: rinse every 4–6 weeks under standard residential bather load, or at ΔP ≥ 8 PSI above clean-filter operating baseline, whichever occurs first. Chemical soak using TSP solution or commercial enzyme-based cartridge cleaner is recommended every 3–6 months to remove oils, lotions, and organic film resistant to rinse-only service. Replace annually or upon visual inspection failure (pleat channeling, fabric tears, end cap delamination, or crushed core). Chemical compatibility: continuous operation at ≤ 10 ppm free available chlorine; muriatic acid wash at 1:20 dilution compatible with ABS end cap construction for calcium scale removal (20-minute maximum exposure, rinse thoroughly before reinstallation); enzyme cleaners compatible without restriction. Post-installation, verify clean-filter operating pressure and log baseline ΔP for future service reference. Standard Unicel 90-day manufacturing defect warranty applies through authorized distribution.

What's Included

Your order includes the selected quantity of replacement spa filter cartridges. Each unit is individually inspected for quality before shipping.

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Product Specs

Product SKU	C-9481
Replaces OEM	Sherlock 120
Filter Model	Jacuzzi Sherlock 120
Filtration Area	120
Length	20-1/16"
Outer Diameter	10"
Center Hole	6"
Media	4 oz
Endcap Material	Durable Polyurethane
Pleat Count	218
Pack Options

Compatibility Table

Brand	Part Number	Type	Status
Unicel	C-9481	OEM-Compatible	Compatible
Jacuzzi	Sherlock 120	OEM Original	OEM
Pleatco	PJ120-4	Aftermarket	Compatible
Filbur	FC-1401	Aftermarket	Compatible
Other	OC-J20A	Aftermarket	Compatible

Unicel C-9481 Replacement Filter for Jacuzzi Sherlock 120 | 120 Sq. Ft.

$117.46 USD

Verify Your Fit

How to Measure

Confirm all three dimensions match your existing cartridge before ordering.

Length

20-1/16" — top endcap to bottom

Outer Diameter

10" — widest point across

Center Hole

6" — inside of the hole

Frequently Asked Questions

Still have questions? Our knowledgeable support agents are standing by to help.

Contact Support

What if it doesn't fit?

We back every order with an exact-fit guarantee. If it doesn't fit your filter housing, contact us within 30 days for a full refund or exchange — no hassle, no restocking fee. Call or text (732) 395-2225.

How long will these last?

With regular cleaning, expect 1–2 seasons of use. Rinse with a garden hose every 4–6 weeks, and do a deep soak in filter cleaner once or twice a season. Replace when you see collapsed pleats, tears in the media, or pressure stays high after a fresh clean.

How do I confirm this fits before I order?

Measure your existing cartridge in three spots: length end-to-end, outer diameter at the widest point, and the inner diameter of the center hole. If all three match the specs listed above, it's a direct fit.