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Whirlwind STA Series Septic Air Pumps

Whirlwind STA Series

The Reliable Linear Air Pump Solution

Whirlwind STA Series linear diaphragm air pumps deliver quiet, reliable aeration for aerobic septic systems from 500 to 1500+ GPD. Six models. Direct OEM replacements. Built to run 24/7.

✓ 2-Year Warranty ✓ Energy Efficient ✓ Weather-Proof ✓ 6 Models Available

Shop All Models Find My Size

How It Works

Proven Linear Diaphragm Technology

Unlike rotary blowers, Whirlwind linear air pumps have no bearings, no oil, and no brushes. The result is an aerator that runs cooler, quieter, and longer with minimal upkeep.

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01 — Electromagnetic Drive

An electromagnetic motor moves a magnetic shuttle back and forth at high frequency — no rotating parts, no lubrication required.

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02 — Diaphragm Compression

Flexible rubber diaphragms expand and contract with the shuttle, pulling in and compressing air with each stroke.

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03 — Pressurized Airflow

Compressed air travels through heavy-duty tubing to a diffuser at the bottom of your tank, creating thousands of tiny oxygen bubbles.

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04 — Aerobic Breakdown

Dissolved oxygen feeds aerobic bacteria that rapidly break down organic waste, keeping your system efficient and odor-free.

Why Whirlwind

Built for the Field. Designed to Last.

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Whisper-Quiet Operation

Anti-vibration rubber feet and linear motor technology keep noise levels low enough to install near living areas without complaint.

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Low Energy Draw

The STA60N draws only 1.17 Amps. The entire STA Series is engineered to deliver maximum airflow per watt, lowering operating costs year-round.

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Powder-Coated Aluminum Housing

Lightweight, corrosion-resistant construction is rated for year-round outdoor exposure. Set it on the tank lid and walk away.

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Tool-Free Filter Access

A hand-adjustable knob on top makes filter replacement fast. Diaphragm rebuild kits restore any unit to like-new condition.

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Low-Pressure Alarm Port

Every STA pump includes a hose bib for the Whirlwind Low Pressure Alarm Kit. The AL model includes the alarm built-in.

STA60N At a Glance

3.7 CFM

Max Open Air Flow

1.17A

Operating Amperage

24/7

Continuous or Timer Operation

6 ft

Power Cable Length

2 yr

Manufacturer Warranty

Included: (1) Filter Pad, (1) Hose Connection, (2) Clamps, and User Manual

All Models

Choose Your Whirlwind STA Model

Six models cover every residential and light-commercial aerobic septic application. Not sure which you need? Use the sizing chart below.

STA60N

60 LPM

Up to 500 GPD Systems

Max Pressure	2.18 PSI
Open Flow	3.7 CFM
Draw	1.17 Amps
Warranty	2 Years

View STA60N →

Which Model Is Right for Your Tank?

Match your system's daily flow rate (gallons per day) to the correct Whirlwind model. Your original system permit or installer paperwork will list this value.

Air Flow Rate	Model	Tank Size (Gallons Per Day)	Typical Application
60 LPM	STA60N	Up to 500 GPD	Small residential (1–3 bedroom home)
80 LPM	STA80N	500 – 750 GPD	Standard residential (3–4 bedroom home)
100 LPM	STA100N	750 – 1000 GPD	Large residential (4–5 bedroom home)
120 LPM	STA120N	1000 – 1200 GPD	Large residential / small commercial
150 LPM	STA150N	1200 – 1500 GPD	Light commercial / multi-unit
200 LPM	STA200N	1500+ GPD	Commercial / high-volume systems

OEM Compatibility

Direct Replacement for All Major Brands

Whirlwind STA Series pumps are plug-and-play replacements for the most common aerobic septic pump brands. Same mounting, same fittings, same performance — lower price.

Hiblow

Replaces HP-60, HP-80, HP-100, HP-100LL and other HP Series models by matching LPM rating.

Alita

Compatible replacement for Alita AL-60, AL-80, AL-100, AL-100P linear air pumps.

Blue Diamond

Drop-in replacement for Blue Diamond ET-60, ETX-60, ET-80, ETX-80, ET-100 aerators.

FujiMAC

Replaces FujiMAC MAC60R II, MAC80R II, MAC100R II linear diaphragm air pumps.

Secoh

Compatible with Secoh EL-60, JDK-60, EL-80, JDK-80, EL-100, JDK-100 series pumps.

Thomas

Direct replacement for Thomas AP-60, AP-60N, AP-80, AP-80H, AP-100 air pump models.

FAQ

Frequently Asked Questions

Common questions about Whirlwind septic air pumps, sizing, installation, and maintenance.

What is a Whirlwind STA Series septic air pump?

The Whirlwind STA Series is a line of linear diaphragm air pumps designed to aerate aerobic septic systems. They push dissolved oxygen into the tank using electromagnetic diaphragm technology with no rotating parts, no oil, and no brushes. This feeds the aerobic bacteria responsible for breaking down waste. They are compact, weather-proof, and engineered for 24/7 continuous operation.

What size Whirlwind air pump do I need?

Size is determined by your system's daily flow rate in gallons per day (GPD). STA60N for up to 500 GPD, STA80N for 500 to 750 GPD, STA100N for 750 to 1000 GPD, STA120N for 1000 to 1200 GPD, STA150N for 1200 to 1500 GPD, and the STA200N for systems over 1500 GPD. When in doubt, go with the next size up. Your original system design permit will list the flow rating.

Is the Whirlwind pump a direct replacement for Hiblow, Alita, or Blue Diamond?

Yes. Whirlwind STA Series pumps are compatible direct replacements for Hiblow HP Series, Alita AL Series, Blue Diamond ET/ETX Series, FujiMAC MAC Series, Secoh EL/JDK Series, and Thomas AP Series pumps. Match the LPM rating of your existing pump to the appropriate Whirlwind model and it will install in the same location with the same connections.

Can the Whirlwind air pump stay outside year round?

Yes. Whirlwind pumps feature a powder-coated aluminum housing designed for outdoor, year-round installation. They sit directly on top of the septic tank lid and can be placed inside a properly vented enclosure such as a decorative rock cover for additional protection. Do not place in an airtight enclosure — airflow is required for proper operation.

How do I maintain a Whirlwind septic aerator?

Maintenance is simple. Regularly clean or replace the filter pad using the hand-adjustable knob on top of the pump — no tools required. Over time, rubber diaphragms will weaken and need replacement. Installing a Whirlwind diaphragm rebuild kit restores the pump to like-new condition and is far more economical than buying a new unit. There are no bearings, brushes, or oil to service.

Can I use the Whirlwind pump on a timer?

Yes. Whirlwind linear air pumps are designed for both continuous 24-hour operation and timer-controlled intermittent use. If using a timer, SepticTankParts.com recommends a "two hours on / two hours off" cycle. Do not leave the pump off for more than two hours at a stretch, as this can allow the aerobic bacterial population in the tank to decline.

Ready to Order?

Spring Problems Need Fast Solutions.

Whether you're a homeowner hearing that wet-weather alarm go off or a septic contractor restocking for the busy season, Whirlwind STA Series pumps ship fast. All six models in stock and ready to go.

Shop All Whirlwind Models Talk to an Expert

SepticTankParts.com is an independent seller of replacement septic system parts for numerous original manufacturers and the use of the names of the original manufacturers, their models, types, part number and other descriptive product information is only for the purpose of aiding customers in cross-referencing the appropriate SepticTankParts.com part.

WARNING: These products can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.

The warning listed above is provided to California consumers to ensure compliance with California Proposition 65.