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Little Giant 1/15 HP 500 gph Aluminum Switchless Switch AC Submersible Utility Pump

Self-primes in shallow water and pushes up to 500 GPH through a corrosion-resistant aluminum housing built to last.
Little Giant MPN 503375 In Stock & Ready to Ship
$239.99
Free shipping on orders over $75
Ships within 24 hours · most orders arrive in about 2 business days

About Product Overview

The Little Giant SUB UTIL PUMP 1/15HP 500 is built for jobs that need constant manual control rather than automatic float-switch operation - think draining a flooded basement floor, pumping down a window well, clearing a low spot in the yard, or keeping water out of a boat bilge. At 1/15 HP it moves up to 500 GPH and pushes water up to 17.3 feet of head through a 1/2" discharge, and being self-priming means it gets to work fast even in shallow, low-water conditions.

The aluminum housing resists corrosion, so it holds up to repeated exposure to standing water without breaking down over time. It's a switchless design, meaning you control on/off manually - useful when you don't want a pump kicking on and off automatically. Runs on standard 115V AC power and carries UL compliance for added confidence, backed by a 1-year warranty from Little Giant.

  • Horsepower: 1/15 HP
  • Maximum discharge flow: 500 GPH
  • Maximum head: 17.3 feet
  • Discharge pipe size: 1/2 inch
  • Housing: corrosion-resistant aluminum
  • Power: 115V AC, UL compliant, manual switchless operation

The Details Specifications

Brand Little Giant
Model / MPN 503375
UPC 010121033757
Weight 8 lbs
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab
Price check

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On Amazon, start with these four questions before you click buy.

01

Who's actually selling it

The brand name is on the listing. A different company is in the seller field. Those aren't the same thing, and the second one is who you're buying from.

02

Whether the warranty survives

Most manufacturers only honor a warranty when the unit came through an authorized dealer. We're authorized for Little Giant. A third-party marketplace seller usually isn't.

03

Where the box came from

Gray-market stock, returns repackaged as new, and outright fakes move through marketplaces constantly. It all looks identical in the photo. It stops looking identical when it fails.

04

Who you call when it breaks

Ours is a phone number with a person behind it who has held this product. M–F, 6 AM – 5 PM Pacific. (866) 469-8556

The big boxes don't care if your hardware store survives.

Amazon, Home Depot, and Lowe's are built to pull every hardware dollar out of your town. When the local shop can't keep the lights on, the counter where somebody actually knew which part you needed goes with it. We're built the other way: real brands so you're never stuck on a marketplace, and a straight answer to buy it down the street when that's the better call. Support independent hardware — it doesn't restock itself.

Why we tell you to shop local
Authorized dealer · Little Giant

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