Furnace and AC · Aquastrong

Aquastrong CDS125STU Condensate Pump

The smaller Aquastrong furnace pump

Updated October 2026

Quick verdict

A good fit for ordinary basement lifts.

Strength
Safety switch and five inlets.
Trade-off
16 ft limit.
Right buyer
Furnaces and AC coils with short lifts.
Max flow (maker)
70 GPH
Max head / lift (maker)
16 ft
Alarm
Safety Switch
Power source
Corded Electric
Dimensions (seller)
11.2"L x 5.5"W x 6.7"H
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Why it matters

The CDS125STU moves up to 70 GPH and lifts to 16 ft, close to the Little Giant VCMA-15 class. A float switch starts it at 1.63 in and stops it at 0.9 in.

It has the same five 1 in inlets, removable 1/2 gallon reservoir and high-level safety switch as the larger CDS320, with a two-year warranty.

Who it's for, and who should skip it

Good fit if

  • Basement furnaces
  • AC coils
  • Dehumidifiers

Look elsewhere if

  • Sump pits or basement flooding
  • Lifts above the maker's maximum
  • Owners who won't clean it twice a year

Pros and cons

Pros

  • Safety switch
  • Five inlets
  • Two-year warranty

Cons

  • 16 ft maximum lift
  • Short cord
  • Clean every six months

Limitations to weigh

  • Wiring the safety switch to your furnace or air handler needs basic electrical knowledge; hire a technician if unsure.
  • Clean the tank, float and check valve every six months or so; algae and slime cause most condensate pump failures.

Specifications

Every figure below comes from the source shown in brackets. Where the maker doesn't state something, we say so instead of estimating.

MaterialPlastic, Polypropylene (PP)Retailer
Dimensions (seller)11.2"L x 5.5"W x 6.7"HRetailer
Max head / lift (maker)16 ftRetailer
Compatible devicesAir Conditioner, Furnace, Dehumidifier, Ice MakerRetailer
Model numberCDS125STURetailer
Max flow (maker)70 GPHRetailer
AlarmSafety SwitchRetailer

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Final verdict

Right-sized for a typical basement furnace.

Where to buy

Our links open this exact model's product page. Prices and stock change; check what's included before you order.

Prices change often; the button shows today's price.

Each button opens this exact model. We may earn a commission on tracked links; it never changes what we publish. Disclosure

Questions buyers ask

How much does the CDS125STU pump?
Up to 70 GPH with up to 16 ft of lift.
When does it switch on?
At 1.63 in of water, stopping at 0.9 in.