Generac PRO ST20-S

Last updated: November 2, 2026

Generac PRO ST20-S
3.1/5#9 of 17 in up to 2 in water pumps
3.1

A well-made 2 in semi-trash pump with a long run time and a three-year warranty, for homeowners who drain pools and yards every year.

  • 158 gpmFlow
  • 108 ftHead
  • Semi-trashType
  • 2 inPorts
Check price at A.P. Electric$699

Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.

Pros
  • 3 gallon tank runs about 5 hours
  • 108 ft of head, high for a 2 in pump
  • Three-year warranty
  • Light at 65 lb
Cons
  • Passes only 1/3 in solids
  • No hoses included

How it scores

The rating comes from 5 measured or published factors, each scored 0-100 against fixed reference points for its size. How we rank explains each one.

Specifications

Model number6919
Pumping
TypeSemi-trash
Ports2 in
Maximum flow158 gpm
Maximum head108 ft
Suction lift26 ft
Largest solids0.3 in
Engine and build
EngineGenerac G-Force OHC, 169 cc
Fuel tank3 gal
Runtime on a tank5 hr
Weight65.3 lb
Warranty3 years

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