Buy Drainage Pumps & Accessories Online in Australia
Drainage Pump Selection — Quick Reference
Drainage pumps REMOVE WATER from EXCAVATIONS + flooded areas + sumps + tanks + water features where natural drainage is insufficient. AU construction + civil + workshop + emergency response.
| Drainage Pump Type | Best For | Flow |
|---|---|---|
| Submersible Sump Pump | Clean water + sump + cellar | Per spec |
| Submersible Trash Pump | Dirty water + small solids | Higher flow |
| Centrifugal Pump (Surface) | Above-water + lay-flat hose feed | High flow |
| Diaphragm Pump | Sludge + difficult media + see diaphragm pumps | Per spec |
| 240V vs 415V vs Petrol | Match to site power availability | Per power |
| Lay Flat Discharge Hose | Hose to drain — see lay flat hose | Per pump |
| Camlock Fittings | Connection — see camlock fittings | Per hose |
| Float Switch (Auto-Stop) | Sump tank protection + automation | Standard |
Critical: Match pump TYPE to MEDIA — clean water pump won't handle sludge. Match POWER source to site. Lay flat hose for DISCHARGE only (NOT suction). Companion: water pumps, diaphragm pumps, lay flat hose, pumps + fluid handling.
Drainage Pumps & Accessories
Drainage pumps remove water from excavations, flooded areas, sumps, tanks, and water features where natural drainage is insufficient or not available. Selecting the right pump for the water type, required flow rate, and installation environment ensures reliable operation and avoids premature pump failure from misapplication. AIMS Industrial supplies submersible drainage pumps and accessories for industrial, construction, and facility management applications.
Clean Water vs Dirty Water Pumps
The most important selection consideration for a drainage pump is the water type. Clean water pumps are designed for water with minimal suspended solids — clear groundwater, clean rainwater, and tank drainage. Allowing dirty or contaminated water into a clean water pump rapidly damages the impeller and seals. Dirty water (semi-solids) pumps have larger passage sizes and more robust impeller designs that pass silt, grit, and small solids without blocking. For construction site dewatering, stormwater collection, and any application where the water contains sediment, a dirty water rated pump is the correct specification.
Flow Rate and Head Selection
Pump performance is described by two parameters: flow rate (litres per minute or m³/hour) and head (metres of water column). Head is the height through which the pump must lift water — a pump located 5m below the discharge point must overcome 5m of static head plus pipe friction. As head increases, flow rate decreases — the pump curve describes this relationship. Select a pump whose curve delivers the required flow rate at the head your installation demands. A pump rated at 200L/min at 1m head may deliver significantly less at 5m head.
Float Switches and Automatic Operation
Float switches allow drainage pumps to operate automatically — the pump starts when the water level rises to the float trigger point and stops when it falls to the stop level. Automatic operation is essential for sump pumps and any application where attendance is not always possible. Ensure the float switch is matched to the pump — most submersible drainage pumps have an integral or optional float switch, but compatibility must be confirmed for separate switch installations.
Accessories
Discharge hoses, inlet strainers, and pump stands are common accessories required for drainage pump installations. Inlet strainers prevent large solids from entering the pump — even on dirty water rated pumps, solids larger than the rated passage size will block the impeller. A quality strainer matched to the pump inlet is a low-cost item that prevents the most common cause of pump failure in site dewatering applications. For pump selection assistance or to confirm the right accessories for your installation, contact our team.
People Also Ask — Drainage Pumps & Accessories
Q: Why does it matter whether a drainage pump is rated for clean water or dirty water?
Clean water pumps are designed for water with minimal suspended solids and are rapidly damaged if contaminated or sediment-laden water gets into the impeller and seals, while dirty water pumps have larger passage sizes and more robust impellers built to pass silt, grit and small solids without blocking — construction dewatering and stormwater collection specifically need the dirty-water rating.
Q: What two performance numbers actually describe how a drainage pump will perform, beyond its maximum rated output?
Flow rate (litres per minute or m³/hour) and head (metres of water column) together describe pump performance — head is the height through which the pump must lift water, and as head increases, flow rate decreases according to the pump's own curve, so a pump's rated output only tells part of the story without knowing the installation's head.
Q: What does a float switch actually do on a drainage pump, and when is it essential?
A float switch starts the pump automatically when water rises to a trigger point and stops it when the level falls to a stop point — essential for sump pumps and any installation where the site isn't attended, though compatibility between the pump and a separate float switch needs to be confirmed rather than assumed.
Q: Why is an inlet strainer considered a low-cost item worth fitting to almost every drainage pump?
Even a dirty-water-rated pump will block if solids larger than its rated passage size get into the impeller, and a strainer matched to the pump inlet is the low-cost fix that prevents what's actually the most common cause of pump failure in site dewatering work.
Q: Can a lay-flat discharge hose be used on the suction side of a drainage pump?
No — lay-flat hose is for discharge only, since it isn't rigid enough to hold its shape under suction and would collapse rather than draw water into the pump.