Submersible Pumps in Australia: The Complete Buying Guide

Submersible pumps are the workhorses of Australian water systems. They sit fully underwater inside a bore, sump, tank or pond and push water up to the surface instead of pulling it. That one design difference makes them quieter, more efficient and far better at moving water from depth than any surface pump. Whether you are drawing bore water on a rural block in Western Australia, keeping a Perth basement dry in winter, or running a sewage pit for a commercial site, the right submersible pump saves you money every single day it runs. This guide explains how these pumps work, which type suits your job, and how to buy one that lasts in Australian conditions.

What Is a Submersible Pump and How Does It Work?

A submersible pump is a sealed motor and pump built as one waterproof unit that operates completely underwater. The motor spins an impeller that pushes water through the pump body and up the discharge pipe. Because the pump pushes rather than sucks, it never loses prime, never needs priming, and never cavitates the way surface pumps can. The surrounding water also cools the motor, which is why quality submersible pumps from brands like Grundfos and Tsurumi routinely run for ten years or more with basic care.

The sealed design matters most in Australia, where bores can run 30 to 100 metres deep. A surface pump physically cannot lift water from more than about 8 metres. A submersible bore pump has no such limit because it sits at the bottom and pushes upward. That is why nearly every household bore, farm bore and irrigation bore in the country runs on a submersible unit. The same principle applies at shallow depths too. A sump pump sitting in a flooded pit will clear water down to millimetres, something no pump on dry land can match.

Types of Submersible Pumps: Bore, Sump, Sewage and Pond

Submersible pumps split into four main families, and matching the family to the job is the first buying decision. Submersible bore pumps are slim, multistage units built to fit inside a 4 inch or 6 inch bore casing and deliver high pressure from serious depth. The Grundfos SQ and SQE range is the benchmark for household bores, while the Grundfos SP series handles larger irrigation and commercial borehole work.

Sump pumps and drainage pumps handle stormwater, flooded areas, lift pits and site dewatering. Tsurumi drainage pumps are the trade favourite here because their cast iron builds survive gritty, dirty water that destroys cheaper hardware store units. For wastewater, sewage cutter and grinder units like the Grundfos SEG and Grundfos SEV vortex pumps chop or pass solids so nothing blocks the line. Finally, submersible pond pumps such as the Davey Dynapond range run fountains, waterfalls and pond filtration 24 hours a day on very little power. If your system needs automatic start and stop or dry run protection, pair the pump with a pump controller and it will look after itself.

Choosing a Submersible Pump in Western Australia

WA conditions are harder on pumps than most of the country, and buying advice written for the east coast often misses this. Perth and much of the coastal plain sit on sandy soil with a shallow water table, so garden bores are everywhere, but that sand also finds its way into casings. Choose a submersible bore pump with a stainless steel body and sand-tolerant hydraulics, and always fit it above the bottom of the bore. Iron in WA groundwater is another common issue. High iron water stains everything and slowly scales up cheap impellers, so corrosion resistant materials are not a luxury here, they are the difference between a pump that lasts three years and one that lasts fifteen.

Sizing follows three numbers: flow (how many litres per minute you need), head (total vertical lift from the pump to your highest outlet, plus friction losses), and depth of installation. Retic on a quarter acre Perth block typically needs a very different pump than a stock water bore near Geraldton or a farm system in the Wheatbelt. If you are not certain, do not guess. An oversized pump wastes power and cycles itself to death, and an undersized one never delivers pressure. Pumptastic is WA based, so you can call (08) 6384 5884 and speak with a local who understands bore water from Broome to Albany and will size the pump from your actual bore report.

Why Buy Your Submersible Pump From Pumptastic

Big box stores sell pumps in boxes. Pumptastic sells pumping solutions with the backup to keep them running. We stock more than 3,000 pumps and parts from Grundfos, Davey, Tsurumi and Onga, every unit carries a full manufacturer warranty, and orders over $100 ship free Australia wide with fast dispatch. Because we also stock capacitors, controllers, pressure tanks and fittings, you can fix or upgrade an existing system instead of replacing it. Most importantly, the person who answers our phone actually knows pumps. Tell us what you are pumping, how far and how high, and we will match you to the right unit the first time. Browse the full range of submersible bore pumps here, check out our sump and drainage pumps, or contact our team for a tailored recommendation today.

Frequently Asked Questions

What is a submersible pump used for?

A submersible pump moves water while fully submerged. Common uses include drawing bore water for gardens and stock, draining sumps and flooded areas, pumping sewage and wastewater, running ponds and fountains, and dewatering construction sites.

How deep can a submersible bore pump go?

Household submersible bore pumps commonly operate from 10 to 100 metres. Larger multistage borehole pumps like the Grundfos SP series can work at several hundred metres. The pump must be sized for the total head, not just the depth.

How long do submersible pumps last?

A quality unit from Grundfos, Davey or Tsurumi typically lasts 8 to 15 years. Lifespan depends on water quality, correct sizing and run time. Sandy or high iron water shortens the life of cheap pumps quickly.

Can a submersible pump run dry?

No. The surrounding water cools the motor, so running dry overheats and destroys the seals. Fit a dry run protection controller or a float switch to shut the pump off automatically when water drops.

What size submersible pump do I need for a garden bore in Perth?

Most quarter acre Perth retic systems run well on a pump delivering roughly 40 to 70 litres per minute at 30 to 40 metres of head, but every bore is different. Call us with your bore depth and sprinkler count and we will size it exactly.

What is the difference between a sump pump and a bore pump?

A sump pump is short and wide, built to sit in a pit and clear shallow dirty water. A bore pump is long and slim, built to fit inside a narrow bore casing and lift clean water from depth at high pressure.

Are submersible pumps better than surface pumps?

For water deeper than about 8 metres, yes, because surface pumps cannot lift beyond that. Submersible units are also quieter, self priming by design and more energy efficient since they push water instead of pulling it.

Can submersible pumps handle dirty water and solids?

Drainage models like Tsurumi handle sandy, silty water. For sewage or water with soft solids, choose a vortex or cutter pump such as the Grundfos SEV or SEG, which are designed to pass or grind solids without blocking.

Do you deliver submersible pumps across regional WA and Australia?

Yes. Pumptastic ships Australia wide via Australia Post with free shipping on orders over $100, including regional WA areas like Geraldton, Bunbury, Kalgoorlie and the Wheatbelt. Most orders dispatch within 1 to 2 business days.

What warranty comes with your submersible pumps?

Every pump we sell carries the full manufacturer warranty. Coverage varies by brand and model, and our team handles warranty claims for you so you are never stuck dealing with a manufacturer alone.

Ready to buy? Shop submersible pumps at Pumptastic or call (08) 6384 5884 for free expert sizing advice.