Genuine Little Giant
Little Giant 4-MD-HC Water Pump
Little Giant · Water Pump

Little Giant 4-MD-HC Water Pump

Model # LG-4-MD-HC
$1,249.99 CAD · ships from Markham, ON
  • Published flow is measured at zero head - real delivery is lower
  • Solids-handling for skimmer-fed and stocked ponds
  • Running cost over a season outweighs the purchase price
  • Utility and mag-drive units are process pumps, not pond pumps
Ask a technician · 1-855-752-5795Request a written quote
  • Authorized Little Giant dealerFull factory warranty honoured
  • Certified repair centreFactory-trained bench in Markham
  • Ships Canada-wideFree on parcel orders over $250
  • A human answersCall or text 1-855-752-5795

Choose Your Pump by Application

What the pump has to move matters more than the brand on it. Start with the job, then match flow to the head height you are actually lifting against.

Waterfall & circulation

AquaSurgeAquaSurgeAquascapeFrom $463.99EcoWaveEcoWaveAquascape, energy efficientFrom $295.99AquaJetAquaJetAquascape, waterfall & fountainFrom $327.99EXT External PumpEXT External PumpAquascape, out-of-pond installFrom $4,015.12Pond PowerheadPond PowerheadAquascape, targeted circulation$231.99Pond-Mag Mag DrivePond-Mag Mag DriveDanner PondmasterFrom $166.59Proline High-FlowProline High-FlowDannerFrom $489.00Proline w/ Protective CageProline w/ Protective CageDannerFrom $485.79

Solids-handling - skimmer-fed and stocked ponds

AquaForce 1000AquaForce 1000Solids handlingFrom $303.99PL SeriesPL SeriesTsurumi-built, 3000-7000 GPHFrom $1,077.22PN SeriesPN SeriesTsurumi-built, 5500-10000 GPHFrom $1,159.99SLDSLDSolids handlingFrom $703.99

Statuary & fountain kits - ready to run

Aquascape UltraAquascape UltraCompact fountain & filter pumpFrom $119.99Aquascape Statuary & FountainAquascape Statuary & FountainUrns, spitters & statuaryFrom $23.19Little Giant PES-40-PWLittle Giant PES-40-PWStatuary fountain pump$59.99Little Giant PES-80-PWLittle Giant PES-80-PWStatuary fountain pump$74.99Pondmaster Eco KitPondmaster Eco KitIncludes fountain headFrom $99.99Hampton 1000 GPH KitHampton 1000 GPH KitIncludes fountain head$279.99

Cleanout, utility & industrial - process transfer, not pond circulation

Aquascape LSR CleanoutAquascape LSR CleanoutPond cleanouts & drainage$812.81Little Giant 1-AA-18Little Giant 1-AA-18Utility$279.99Little Giant 1-42Little Giant 1-42Utility$229.99Little Giant 1-42ATLittle Giant 1-42ATUtility$214.99Little Giant 1-ATLittle Giant 1-ATUtility$249.99Little Giant 1-TLittle Giant 1-TUtility$299.99Little Giant 1-YLittle Giant 1-YUtility$299.99Little Giant 1-YSLittle Giant 1-YSUtility$279.99Little Giant 2E-NLittle Giant 2E-NUtility$289.99Little Giant 2E-NYSLittle Giant 2E-NYSUtility$389.99Little Giant 4E-34NRYLittle Giant 4E-34NRYUtility$789.99Little Giant 2-MDLittle Giant 2-MDMagnetic drive - check fluid$829.99
Little Giant 4-MD-HCViewingMagnetic drive - check fluid

Overview

Chemical transfer pumping doesn't have to be challenging with Little Giant. The 4-MD-HC series brings the convenience of an all-in-one pump constructed of a rugged design to handle the toughest highly corrosive abrasives and solvents. And, it's engineered with run-dry capability up to 8 hours. The 4-MD-HC offers excellent wear and trouble-free service.

Features & Benefits

  • 1/10 hp open FC PSC motor
  • Glass-filled polyphenylene sulfide magnet housing and volute
  • Fluoroelastomer (FKM) O-ring
  • Ceramic thrust washers and shaft
  • 1" FNPT (25.4 mm) intake
  • Run dry capability up to 8 hours
Before you order

Questions our techs answer every week

How do I size a pump for a waterfall?

Two numbers: the width of the spillway and the height you are lifting to. Wider spillways need more flow to look full, and every foot of rise cuts what the pump actually delivers.

Published flow ratings are measured at zero head - a pump rated 4,000 GPH delivers considerably less at eight feet. Send us the width and the height and we will size on real delivery rather than the number on the box.

What is a solids-handling pump and do I need one?

It passes debris rather than screening it out. If your pond is skimmer-fed, stocked with fish, or collects leaves, you want one - a screened pump in that setting clogs between visits.

For a clean statuary feature or a self-contained urn, solids handling is unnecessary and a compact pump is the better fit.

How much flow does a pond need?

A common working target is turning the volume over roughly once an hour on a stocked pond. Lightly stocked ornamental ponds tolerate less; heavily stocked koi ponds want more.

Waterfalls are sized differently - on flow per inch of spillway width rather than on pond volume. If you have both, size for whichever is the larger duty.

Can I use a Little Giant utility pump in my pond?

Generally not the right tool. The Little Giant utility and magnetic-drive units here are process and transfer pumps built for specific fluids and duty cycles, not continuous pond circulation.

If you are moving anything other than pond water, tell us what it is - seal and housing material compatibility matters and the wrong choice fails quickly.

Does the pump come with fittings or a fountain head?

Some do. The statuary and fountain kits arrive with a head ready to run. Most pond and waterfall pumps ship as the pump alone.

Check pump parts and accessories for fittings, or tell us your pipe size and we will include what you need.

Should I take the pump out for winter?

It depends whether the feature runs through winter. A pump left in a pond that freezes solid around it will be damaged.

If you are shutting down, the pump comes out, gets cleaned and is stored somewhere above freezing. If you are running through, we will advise on what the setup needs - ask before freeze-up.

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