NowDoWin 4 Inch Septic Tank Filter Replacement – Septic Effluent Filter Fits 4” Pipe & Septic Baffle Filter Systems, Compatible with STF-110, Easy Install Outlet Insert, Green — Open-Box, 5% Off

Name: NowDoWin 4 Inch Septic Tank Filter Replacement – Septic Effluent Filter Fits 4” Pipe & Septic Baffle Filter Systems, Compatible with STF-110, Easy Install Outlet Insert, Green
Brand: Nowdowin
SKU: awhd-us-b0dr781hjs
Price: 37.98 USD
Availability: InStock

Brand: Nowdowin

Condition: Used

$37⁹⁸

$39⁹⁸

-5% Save $2⁰⁰

Updated: 10 days ago

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Description

DESIGNED FOR STANDARD 4” SEPTIC OUTLET SYSTEMS: This 4 inch septic tank filter is built to fit standard 4” pipe openings and septic baffle filter systems. Please measure your outlet diameter before ordering to confirm proper fit. SEPTIC EFFLUENT FILTER COMPATIBLE WITH STF-110: Engineered as a septic effluent filter replacement compatible with STF-110 filter systems. A practical solution when replacing a worn or clogged outlet filter. FITS 4” PIPE WITHOUT MODIFICATION: Installs directly into existing 4” outlet pipe or baffle housing. Fits 4” pipe configurations commonly used in residential septic systems. SUPPORTS PROPER SEPTIC SYSTEM OPERATION: Designed to capture larger suspended solids at the outlet stage, helping reduce excess solids entering the drain field and supporting steady wastewater flow. REMOVABLE FOR ROUTINE MAINTENANCE: This septic baffle filter insert can be removed for periodic inspection and cleaning. Simple removal design allows convenient maintenance according to your service schedule.

4 Inch Septic Tank Filter Replacement for Residential Systems

This 4 inch septic tank filter functions as a septic effluent filter installed at the outlet side of your septic tank. It is designed to fit standard 4” pipe openings and septic baffle filter systems used in many residential setups.

Compatible with STF-110 filter system formats.

What Does This Septic Effluent Filter Do?

The filter is placed inside the outlet pipe or baffle chamber of the septic tank.

Its function is to capture larger suspended solids before wastewater flows into the drain field. By reducing the amount of solids moving downstream, it supports proper septic system operation and helps reduce strain on the leach field over time.

Will It Fit My Septic Tank?

This unit is designed to:

Fit 4” pipe outlet openings
Work inside septic baffle filter housings
Serve as a replacement compatible with STF-110

Before purchasing, measure the inside diameter of your outlet pipe to confirm it is 4 inches.

Is Installation Difficult?

Installation is straightforward:

1. Remove existing filter (if applicable)
2. Insert the new septic effluent filter into the 4” pipe opening
3. Position securely within the outlet baffle area

No special tools or plumbing modifications required.

Maintenance Guidelines

Routine inspection is recommended based on household usage and septic service intervals. The removable design allows the septic baffle filter to be taken out, rinsed, and reinstalled with minimal effort.

Product Specifications

Type: Septic tank outlet filter
Diameter: 4 inches
Application: Fits 4” pipe systems
Compatibility: Compatible with STF-110
Color: Green
Use: Residential septic tank systems

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Product Details

SKU:: awhd-us-b0dr781hjs
Model:: STF2521L
Country:: US
ASIN:: B0DR781HJS

Shopping Smarter

Common questions about buying open-box and refurbished.

Why buy refurbished or open-box?

Refurbished and open-box products offer the same performance as new at a fraction of the price. You're already saving $2 on this listing. They've been inspected, tested, and are ready to use — the only difference is the price tag. Buying refurbished also reduces electronic waste, extending product life cycles and keeping functional devices out of landfills.

What's the difference between open-box and refurbished?

Open-box products are customer returns that have been inspected and confirmed functional. They may show little to no use — often the item was returned simply because the buyer changed their mind. Refurbished products have been professionally repaired or restored by technicians, tested to meet or exceed manufacturer specifications, and sometimes come with a warranty. Both are a smart alternative to buying new.

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