Stealth Circulating Pump
Industry Best Circulating Pump Performance
43gpm at 3.75psi! And the Quietest!
Replacement for Iron Might by Waterway (1/8 hp).
Replacement for Circ-Master by Aqua-Flo (1/15 hp).
We have specialized in designing and manufacturing spa and hot tub pumps since 1987. We manufacture 11 series of spa pumps to meet all of your hot tub performance needs.
Click here to find more spa pumps factory direct.

Knowledge and Experience You Can Trust:
Our knowledge is powered by 17 patents and over 28 years of experience designing and producing the best spa support products in the hot tub industry.

Consumer Comments:
"Hi Joe,
Pump arrived one day early. It took 20 minutes to get it wired and installed. It's a prefect replacement for the Aqua-flo Circ-master HP and at considerable savings. This pumps runs very quiet. If I didn't have the water fall on I don't think I'd hear it. Will be in the spa shortly.
Regards, Ken Ekern"

All our products are built new to order.
Click on the pump model number below to see dimensions...
Stealth Circulating Spa Pump
Model Numbers: AC11575-1, AC23075-1
Click model number above to see dimensions WITHOUT unions
[Fig. ]
Unions sold separately, see Table 5.
Stealth Circulating Spa Pump
Model Numbers: AC11575-1, AC23075-1
Click model number above to see dimensions WITH unions
[Fig. ]
Unions sold separately, see Table 5.
Table ()  Stealth Pump Discharge Positions For Various Spa Plumbing
Discharge Right (-3)
Click to see Intake/Discharge dimensions.
Maverick (discharge right)
[Fig. ]
Click below to select

Discharge Up ( )
Click to see Intake/Discharge dimensions.
Maverick (discharge up)
[Fig. ]
Click below to select

Discharge Left (-4)
Click to see Intake/Discharge dimensions.
Maverick (discharge left)
[Fig. ]
Click below to select

Table ()  Select the Proper Shaft Seal Between the Electric Motor and Wetend From Figure F and G (We will build your pump accordingly):
Industry Standard Seal (-A)
Pump Seal -A
[Fig. ]
Click below to select

Better Than Industry Standard Seal (-P)
Pump Seal -P
[Fig. ]
Click below to select

The Best Corrosion Resistant Seal (-SC)
Water Chemistry Noncorrosive
Pump Seal -S
[Fig. ]
Click below to select


To Order Your Stealth Spa Pump From Table 3 and Table 4:
. Find your desired pump model number from Table 3 or Table 4 below. . Click the button to match your desired pump seal. . Change the quantity (if needed). . If you need unions or cables for your Stealth pump, select them in Table 5 below. . Click 'Add to Cart' button next to desired accessory and change quantity (if needed). . Go back to your desired pump; Verify the model number, pump seal and quantity are correct. . In the same row as your desired pump, click 'Add to Cart' button below the quantity. . Click button to check and submit your order. . Due to variations in individual computers, our page may not display properly on your computer. When placing your order, please verify your desired pump shaft seal are identified on the model number in Table 2 and Table 3. All pumps ship with the "-A" (std) pump seal unless you choose the "-P" (better) or "-SC" (best) seal.

To Order Your Motor Only, 48-Frame, Through-Bolt, Make Your Selection From Table 5:
[Fig. ]
Part 890 - Motor for Iron Might and Circ Master
<Click on pump for 48-Frame motor dimensions>
  [Fig. ]
Part 892 - Motor for Iron Might and Circ Master
<Click on pump for 48-Frame motor dimensions>
Parts 890 & 892 are rated 1/8 hp by A.O.Smith and 1/15 hp by Emerson. They are identical and interchangeable.


Pump weight does not include packaging material or shipping container.

When shopping for a replacement spa pump, always ask for the original Stealth.

Models: AC11575-1, AC23075-1

  1. The Stealth is designed to optimize spa pump performance while using the least electrical energy.
  2. The Stealth pump passed all Public Safety tests per UL Standard 1081.
  3. The Stealth pump is powered by A.O.Smith/Magnetek/Emerson/Marathon Electric/Franklin Electric motors and not by inferior quality motors. Even though motor manufacturers may have different physical motor configurations (for example, capacitors and terminals in different locations), all motors are made per our pump performance specifications. Acura Spa pumps are produced and shipped per our model numbers with any of these motor brands.
  4. The Stealth series has powered hundreds of thousands of spas of different brands throughout the world since its introduction in 1988.

The Stealth pump series was first introduced to the portable spa market in 1988 as the first full-rated 2.0hp, 230V, 2-speed pump with a 48-frame motor. The Stealth was also the first pump with an eight-vein impeller design resulting in a dramatic decrease in operational noise while still maintaining high water flow. Throughout the years the Steal pump has powered many spas made by: Action Spas, Carribean Spas, Catalina Spas, Curtis Spas, Dakota Spas, Diamante Spas, Dolphin Spas, Goodlife Spas, Grecian Spas, Hawkeye Spas, Hydromex, Islander Spas, Jetpool (Brazil), Leisure Spas, Life Spas, Lifespring Spas, Mountain Spring Spas, Orozco International Spas, Pacific Fiberglass, Pacific Pool and Spas (Canada), Platinum Spas, Seacard Pool and Spas, Sunbelt Spas, Sunquest Spas, Thermospas, US Tooling Spas, Vortex Whirlpool Systems, Inc., and many others. The Stealth pump can replace any spa pump with 1.5" intake and 1.5" discharge lines.

Replace your old spa or hot tub pump with the latest technology from Acura Spa Systems, Inc. We have over 1.3 million spa and hot tub pumps sold and operating for the last 22 years. All of our spa and hot tub pumps are ETL listed and tested per UL Standard 1081. Our long lasting spa and hot tub pumps are the quietest, most innovative, and most energy efficient in the industry. We are the only spa pump manufacturer to sell direct to the public. Since 1987, our hot tub pumps have been powered by Magnetek Motors, A.O. Smith Motors, Emerson Motors, Marathon Electric and Franklin Electric Motors. Our pumps for many years have supplied many hot tub manufacturers such as: ThermoSpas, LifeSpas, Islander Spas, Catalina Spas, Diamante Spas and Life Spring Spas.

Iron Might Replacement Spa Pump for $114, Iron Might Replacement Hot Tub Pump for $114, Circulation Spa Pump for $114, Circulation Hot Tub Pump for $114, Spa Pump for $114, Hot Tub Pump for $114, Spa Pumps for $114, Hot Tub Pumps for $114, Circ-Master Replacement Spa Pump for $114, Circ-Master Replacement Hot Tub Pump for $114, 24-Hour Circulation Spa Pump for $114, 24-Hour Circulation Hot Tub Pump for $114, 24-Hour Circulating Spa Pump for $114, 24-Hour Circulating Hot Tub Pump for $114, Spa Pump, Spa Pumps, Hot Tub Pump, Hot Tub Pumps

To select additional Stealth Spa Pump parts and components,
scroll to the table below.

Table () Stealth Spa Pump Unions
Spa Plumbing
Part #1660: 1.5" Union with Nut and O-Ring
Spa Plumbing
Part #1650: 1.5" Discharge Union with Nut (NO O-Ring)
Table () 1.5" Intake, 1.5" Discharge
Spa Plumbing
Click here for help with the spa plumbing
Spa Plumbing
Part #1660 & Part #1650


Horsepower: spl means "special peak horsepower", cd means "continuous duty horsepower".
Model numbers with suffix (-1) indicates the motor is single speed.

All model numbers shown on this table indicate discharge straight up [Fig. C].
Model numbers with suffix (-3) indicates the discharge is to the right [Fig. B].
Model numbers with suffix (-4) indicates the discharge is to the left [Fig. D].

No O.E.M. dealers or distributor discounts with limited offer prices.

All pumps are not provided with unions, unions sold separately. Unions are identified by plumbing dimensions (like 1.5" or 2.0"), but these numbers ARE NOT the physical outer pipe dimensions. These numbers indicate the waterflow volume going into and out of the pump. Please use part numbers as identified for your application.

All electrical work must be performed by a licensed electrician.
All plumbing work must meet I.A.P.M.O., UL 1563, and all local codes and regulations and must be performed by a licensed plumbing contractor.


Exploded Views & Parts List
Stealth Volute and Faceplate
Both Intake and Discharge have
the same threads and
outer thread dimensions.

Stealth Exploded View


*Free Freight only for Fedex SmartPost. Other forms of shipping incur additional shipping costs.

**Beating competitor's price: We will meet or beat any competitor's written quotation for hardware of the same capability, such as: plumbing size, voltage, motor horsepower, motor 1 or 2-speed, heater length, safety test report, etc.

***We do not provide assembly instruction for "DIY". Parts sold as "DIY" are not warranted by Acura Spa Systems, Inc. Just as tire alignment is critical for tire wear on your car, proper motor shaft alignment to the pump is critical for the longevity of the pump. At Acura Spa System, we use factory made jigs to ensure proper alignment when we assemble the pumps.

A $9.95 Handling charge is applied to all orders.

All products sold per our "Terms and Conditions" found in the "Support" section of our menu.

When your order is produced, the pump motor used (A.O. Smith, Regal Beloit, Marathon Electric, etc.) will be whatever is in stock in our factory at the time.