Choosing the right system
Choosing a submersible or bore pump
If you’re drawing water up from a bore, a well, or a deep tank, you need a pump that sits down in the water and pushes it up, a submersible, rather than a surface pump that sucks. Getting the right one comes down to a couple of measurements. Grewa doesn’t make a bore pump yet, so here’s honest guidance to find the right one now.
Submersible vs surface: depth decides
A surface pump can only lift water about 7 to 8 metres by suction before physics stops it. Below that you need a submersible pump that sits in the water and pushes it up. So the depth to your water level is the first thing that decides the type.
The two numbers that matter
Total head, how far up and along the pump has to move the water, in metres. And flow, how much water you need, in litres per minute. Your bore’s depth and standing water level give you the head; your use (house, irrigation, stock) gives you the flow. Every pump has a curve showing flow at a given head; you match your numbers to a pump whose curve covers them.
Also check
- The bore or casing diameter, submersibles are sized to fit (3-inch, 4-inch, and so on).
- Whether the water is sandy or silty, you may need a bore-sump or a pump rated for solids.
- The power available at the site.
- What it feeds: a pressure system, or straight into a tank.
How to find the right one today
Get your bore depth, standing water level, casing diameter and required flow together, then search along the lines of "submersible bore pump selector Australia" with your head and flow, or paste this into an AI assistant and fill in your numbers:
I need a submersible bore pump in Australia. My bore is about [X] metres deep, the standing water level is roughly [Y] metres down, the casing is [Z] inches, and I need around [N] litres per minute to supply [a house / irrigation / stock troughs]. What pump type, head and flow rating should I look for, and which specs should I compare between models?
Where Grewa fits
We’re growing our range out from our smart pressure pumps. A bore pump feeding a tank, with a Grewa pressure pump handling the house side, is a common and reliable setup, so tell us what you’re running and we can help with the pressure side today, and the bore side as our range grows.
Common questions
Can I just use a normal pressure pump on my bore?
Only if the water sits within about 7 metres of the surface, that’s the suction limit of a surface pump. Deeper than that and a surface pump simply can’t lift it; you need a submersible down in the water.
How do I find my bore’s depth and water level?
Your bore’s drilling report, if you have it, lists the depth and standing water level. If not, a driller or pump installer can measure it. Those two numbers decide almost everything.