Pump Station Maintenance Schedule
For Australian homeowners, builders and plumbers looking after a domestic or small commercial sewer pump station.
Not sure your station is the right size? Our sewer pump station calculator works out the tank size, pump head and the packaged stations that fit your job.
Pump station maintenance on a domestic sewer station comes down to three intervals: a two minute look every month, a clean of the float and a check of the valves every six months, and a proper service by a licensed plumber once a year. That is it. Most stations that fail early were not neglected for years. They were ignored for one bad season with a stuck float.
The schedule below is what we tell people who ring after the alarm has gone off. Better to hear it before.
The pump station maintenance schedule at a glance
A domestic sewer pump station needs a monthly owner check, a six monthly clean and an annual plumber service, with busier or commercial stations moving to quarterly. Here is the whole thing on one table.
| Interval | Who | Task |
|---|---|---|
| Monthly | Owner | Lift the lid, look at the water level, listen to one pump cycle, check for smell and fat on the surface |
| Monthly | Owner | Press the alarm test button, or lift the alarm float, and confirm the beacon and siren work |
| Every 6 months | Owner or plumber | Hose the fat off the float switch and alarm float, check the float cables are not tangled on the pipework |
| Every 6 months | Owner or plumber | Close and reopen the ball valve so it does not seize |
| Every 12 months | Licensed plumber | Lift the pump, clear rags off the cutter or impeller, inspect the cable and seal, check the non return valve, time a full cycle |
| Every 12 months | Licensed electrician if needed | Test the RCD, check the control panel and alarm enclosure for moisture |
| Every 2 to 5 years | Licensed plumber | Pump out and wash down the tank if solids or fat have built up |
General guide for domestic and light commercial sewer pump stations in Australia. Your station's manual and your plumber override this table. Commercial, childcare and multi dwelling stations generally need quarterly servicing.
The monthly check takes two minutes
The monthly pump station check is a look, a listen and an alarm test, and any owner can do it without tools. Lift the lid. The water should sit between the pump start and stop levels, not up near the inlet. Run a tap or flush a couple of times until the pump kicks in, then listen.
A healthy pump runs smoothly and stops cleanly. It should not rattle, grind or hum without moving water. It should not restart a few seconds after it stops, because that is short cycling and it wears out the motor, the seal and the switch fast.
Then test the alarm. Stations like the REEFE RGM055A 250L Sewer Pump Station ship with a high level float alarm and beacon. An alarm that has not been tested in two years is decoration. If yours does sound, Pump Station Alarm Going Off? What It Means covers what to check first.
What to look for when the lid is up
- A thick fat layer on the surface. Someone is pouring cooking fat down the sink. Sort that out now.
- Rags or wipes floating. They will end up around the cutter. Find out who is flushing them.
- Water sitting above the high level float. The pump is not keeping up or not running. Call a plumber.
- A strong sewage smell outside the pit. Check the lid seal and the vent before anything else.
Do not reach into the tank. Raw sewage and a 240V pump are not a DIY combination, even with the power off.
The six monthly clean is mostly about the float
The six monthly job is cleaning the float switch, because the float switch is the part most likely to fail in a sewer pump station. Fat coats the float, the float gets heavy or sticky, and it stops moving freely. Stuck down, the pump never starts and the tank fills. Stuck up, the pump runs dry and cooks itself.
With the power isolated, hose the float and the alarm float down from above until they move freely on their cables. Check neither cable has wrapped itself around the discharge pipe or the valve. A float that cannot swing through its full travel will not switch at the right level, and that alone can cause short cycling.
While the lid is off, close the ball valve and open it again. Ball valves rarely fail from use. They seize from never being touched, and the day it matters is the day a plumber needs to isolate the pump in a hurry.
The annual service is a job for a licensed plumber
An annual sewer pump station service means lifting the pump, inspecting it and putting it back, and in Australia that is work for a licensed plumber. Expect them to do the following.
- Isolate the power and the discharge line.
- Lift the pump out using the lifting handle or chain.
- Clear any rag, hair or wipes from the cutter, grinder head or impeller.
- Inspect the power cable and float cables for cuts, and the pump body for damage.
- Check the non return valve closes properly, so the discharge line does not drain back into the tank.
- Reinstall, restore power and time a full pump down from start level to stop level.
- Test the high level alarm and note anything that is getting close to replacement.
Timing the pump down is the step people skip, and it is the most useful. If the same tank took 40 seconds to empty last year and takes 70 seconds now, the pump is wearing, the discharge line is partly blocked, or the non return valve is leaking back. Any of those is cheap to fix now and expensive to fix after the pump burns out.
Pre-assembled stations make the annual service faster. The Kwikflo 250L Sewer Pump Station comes with the ball valve, non return valve and barrel unions already fitted, so the pump undoes and lifts out without cutting pipe. The REEFE station uses cam lock pipework for the same reason.
Commercial and busy stations need servicing quarterly
A pump station serving a commercial site, a childcare centre, several dwellings or a basement car park should be serviced every three months, not once a year. The pump runs more hours, the inflow is less predictable, and a failure affects more people. Some water authorities and building managers set the interval for you. Your plumber will know.
For those sites, a dual pump station takes a lot of the risk out of the schedule. The Kwikflo Dual Sewer Pump Station alternates duty between two pumps, so each one does roughly half the hours, and one pump can be pulled for service while the other keeps the site running.
What a maintained pump station costs to keep
Keeping a domestic sewer pump station maintained usually costs one plumber call out a year plus a replacement float switch every few years, which is small money next to a failed pump. The pump is the expensive part. Here is what a replacement costs if the schedule gets ignored.
| Replacement pump | Type | Power | Max head | Price |
|---|---|---|---|---|
| Aline SABRE ALC750-1A | Automatic cutter | 0.75kW, 240V | 14m | $1,501 |
| REEFE RGM055A | Automatic grinder | 0.55kW, 240V | 10m | $1,590 |
| REEFE RGS11A | Automatic grinder | 1.1kW, 240V | 16m | $2,135 |
Waternex list prices in AUD including GST, prices current as of September 2026. Pump only, installation extra. Electrical connection must be done by a licensed electrician.
A well maintained pump in a domestic station typically runs 8 to 12 years. A neglected one can be done in 3 to 5. The full breakdown by component is in How Long Does a Sewer Pump Station Last.
The best maintenance happens at the toilet and the sink
The cheapest pump station maintenance is keeping wipes, rags and cooking fat out of the drains in the first place. No schedule survives a household flushing wet wipes. "Flushable" on the packet describes the toilet, not the pump. Put a sign in the bathroom of a granny flat or rental if you have to. Scrape pans into the bin, not the sink.
Protect the lid too. A station under a driveway needs a trafficable cover, such as the 600 x 600mm Class D Cast Iron Trafficable Pit Cover, not the pedestrian lid it shipped with. A cracked lid lets stormwater and soil in, and that shows up as extra pump starts and silt in the tank.
Frequently asked questions
How often should a sewer pump station be serviced in Australia?
A domestic sewer pump station in Australia should be serviced by a licensed plumber at least once a year, with the owner doing a quick monthly check and cleaning the float every six months. Commercial, childcare and multi dwelling stations should be serviced every three months.
Can I maintain my own pump station?
Yes, an owner can do the monthly visual check, the alarm test and hosing down the float switch with the power isolated. Lifting the pump, working on pipework or valves and any electrical work should be done by a licensed plumber or licensed electrician.
How do I clean a pump station float switch?
To clean a pump station float switch, isolate the power, then hose the fat and debris off the float from above until it moves freely through its full travel. Check the float cable is not caught on the pipework before restoring power, and run a pump cycle to confirm it switches on and off.
How often does a pump station tank need pumping out?
A domestic sewer pump station tank usually needs pumping out and washing down every 2 to 5 years, or sooner if solids or fat have built up on the floor and walls. A station fed wet wipes or kitchen fat needs it far more often. Your plumber can judge it at the annual service.
What happens if you do not maintain a sewer pump station?
An unmaintained sewer pump station usually fails through a fat coated float switch, which either stops the pump starting and floods the tank or leaves it running dry until the motor burns out. The result is often a sewage overflow and a replacement pump costing $1,500 to $2,200 before labour.
Need a replacement part or a station that is easier to service?
Send us the model plate details from your pump and a photo of the pit, and we will match a replacement pump. If you are putting a new station in, we will point you at one with pre-fitted unions or cam locks so every future service is quicker. Plumbers and builders doing volume should look at trade pricing.
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Talk to the Waternex team about your station
This guide is general information for Australian conditions and is not a substitute for advice from a licensed plumber. Maintenance intervals are indicative only and your station's manual takes priority. Pump station servicing, pump replacement and sewer connection are regulated work, and electrical work must be done by a licensed electrician. Requirements differ between states and water authorities, so have your plumber confirm the right schedule for your site.