6-CIA Automatic Sump Pump w/ Diaphragm Switch and 10' cord, 1/3 HP, 115V

Little Giant

Brand: Little Giant

Mfr Part#: 506158

Model: 6-CIA

UPC#: 010121061583

Availability: In Stock
Usually ships: within 1 business day
Qty Price
$124.95 / each & Free Shipping
  • Description
  • Literature
  • Reviews (4)
  • FAQs (3)

Little Giant 6-CIA (506158) is an Automatic Submersible Sump Pump (Big John series) with a powerful 1/3HP motor (oil-lubricated for life), a 10-foot long power cord and a diaphragm pressure switch which engages the pump at 7" to 10" water level and turns it off at 1" to 4" of water.
The Little Giant 506158 model is among the Little Giant's most popular sump pump models and is well suited for extended or continuous use in moving large volumes of water. All 6-CIA models, including this one has a 1-1/2" FNPT discharge, 1-1/4" reducing bushing for connection to smaller diameter discharge pipe and an optional 3/4" regular garden hose adapter. Little Giant 506158 model has a poly-carbonate cover, a polypropylene volute/base, cast iron housing, stainless steel components for enhanced corrosion resistance and built-in thermal overload protection. 6-CIA series sump pumps are best suited for residential and light commercial use.

Head (ft) Flow (GPM) Head (m) Flow (LPM)
5 46 1.5 174.1
10 29 3.0 109.8
15 12.5 4.6 47.3


  • 1/3 HP shaded pole motor with overload protection;
  • Designed for continuous duty;
  • Epoxy coated cast iron housing;
  • 1-1/2" FNPT discharge with optional 1-1/4" FNPT reducer (included);
  • Carbon/ceramic shaft seal;
  • Upper and lower sintered sleeve bearings;
  • UL / CSA listed;

Technical Specifications:

  • Model: 6-CIA;
  • HorsePower: 1/3 HP;
  • Max. Flow: 46 GPM @ 5ft of Head;
  • Cord Length: 10ft;
  • Shut Off @ 18ft of head;
  • Voltage: 115V;
  • Hertz: 50/60 Hz;
  • Amps: 9A;
  • Watts: 720W;
  • Weight: 18 lbs;
  • Dimensions (H x W x L): 6" x 8.5" x 9.5";
  • Certification: UL/CSA;


2 years from the date of installation.
6-CIA Automatic Sump Pump w/ Diaphragm Switch and 10' cord, 1/3 HP, 115V has an average 4.5 out of 5 rating based on 4 user reviews.
Terrific Product
By David (from St. Louis, Mo) on 3/2/2013
I'm replacing mine today after 12 years (original builder install) and not because it isn't still working, but because I can't believe it's still working. This is a preventative replacement because most of what I have read says they generally should be replaced by now. Great product that did its job and then some.
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Excellent reliable product.
By Louis (from New Jersy) on 10/17/2011
Diaphragm switch is brilliant
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Great Pump!
By Jim (from Cincinnati) on 10/5/2011
This is a great sump pump, it is ideal for smaller sump wells, where there is not enough room for a float.
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Have not used it. It is my spare pump.
By Ray (from Lincoln NE) on 7/4/2011
I'll keep it for a spare.
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Is there a problem with having 4-7" of standing water consistently? We would like to use this to drain a dehumidifier into a basin to keep a basement (and lots of expensive electronic equipment) dry, and are concerned that standing water would create too much humidity. Thank you
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1 of 1 people found this answer helpful.
Since there are many considerations to take into account, it's best to drain the condensate directly into the sewer line rather then a sump pit. Look up and compare different condensate removal pump specs to see which one has appropriate head and flow parameters to be able to discharge the condensate at the level of the sewage pipe. Be sure to get a pump with a built-in check valve - it will prevent the backflow and unnecessary cycling of the condensate pump. As for having 4-7" of standing water - it's acceptable for the pump and as long as you have the sump basin sealed with a cover and a separate vent line - this will prevent moisture in the basement.
Answered on 5/20/2013 by PexUniverse Customer Service
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HelloWhat is the difference between a 506125 and a 506158
Read 1 answer
Little Giant 506125 model has a 25ft cord. Otherwise, these pumps are the same.
Answered on 3/25/2013 by PexUniverse Customer Service
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Pump will not stop working after pit is dry
Read 1 answer
0 of 1 people found this answer helpful.
Please refer to the page 4 of the installation manual. The troubleshooting for your issue is described in detail there.
Answered on 3/31/2015 by PexUniverse Customer Service
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