NSW Plumbing Licence 456767C
Sewer Pump Services operates under a current NSW plumbing contractor licence — licensed plumbing and drainage work, on record.
🚨 24/7 help available · Sydney
Sewer pump alarm going off?
That alarm means one thing: the level in your pump pit is higher than it should ever get. Either the pump isn't running, or it's running and not moving water. Here's what to do right now — and what's usually behind it.
STOPCut water use — every drop goes to the pit
CHECKOne look at the breaker, one reset only
CALLWe answer 24/7, every day of the year
Alarm callouts answered 24/7
Parts on the van for common failures
Quoted on the day, before we start
Pump specialists since 1985
Do this now
Four steps, in order. They protect your house, and they tell us most of what we need to know when you call.
01
Stop running water
Every flush, shower and load of washing goes into a pit that's already too full. Hold off on water use until the pump is sorted — it buys you time and can prevent an overflow.
02
Check the power
Look at the switchboard for a tripped breaker or safety switch, and check the pump's power point if it's accessible. If a breaker has tripped, reset it once only — if it trips again, leave it off and call.
03
Don't open the pit
Silence the buzzer at the panel if it has a mute button, but leave the lid alone. A sewer pit holds sewage and sewer gas — there's nothing in there a homeowner should be reaching into.
04
Call a pump specialist
Tell us what the panel is showing and what the pump's doing. We'll tell you over the phone whether it can wait for a booked visit or needs an emergency callout tonight.
What the alarm is actually telling you
Every pumped sewer system has a high-level float sitting above the level the pump normally works to. In normal operation it never gets wet. When it does, the panel sounds — because the pit has filled past the point where the pump should have already emptied it.
So the alarm isn't the problem; it's the messenger. Behind it is always one of two situations: the pump isn't running at all — power, float switch, or motor — or it's running but not actually moving water, because something has jammed the impeller, the non-return valve has failed, or the discharge line is blocked.
You usually can't tell which from above the lid, and you shouldn't go below it — a sewer pit holds sewage and sewer gas. What you can do safely is the four steps above. The diagnostic is our job: megger and amp testing on the motor, the float checked through a full cycle, and an honest call on whether it's a repair or a replacement.
What sets the alarm off
Six causes account for nearly every alarm callout we attend. Here's what's usually behind the noise.
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Float switch stuck or fouled
The most common cause we find. Fat, wipes or rag coat the float, or it's hung up on cabling or the pit wall — so the pump never gets the signal to start and the level keeps rising until the alarm float trips.
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Power to the pump lost
A tripped breaker or safety switch, a failed power point, or a fault in the control panel. The pump is fine — it just isn't being fed. This is the one cause you can sometimes fix yourself with a single breaker reset.
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Pump jammed
Wet wipes, rags or a foreign object wrapped around the impeller stop the pump dead, or trip its overload. The motor hums or does nothing while the pit fills. The pump needs to be lifted and cleared — don't keep resetting it.
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Motor failure
Worn seals let moisture into the windings until the motor shorts or trips out. An older pump that's been short-cycling or running hot for months often fails this way — the alarm is the first most owners hear of it.
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Non-return valve failed
A jammed valve lets everything the pump just pushed out fall straight back into the pit. The pump runs and runs but the level barely drops — eventually it can't keep up and the alarm fires.
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Pit taking on more than it should
Heavy rain finding its way into a sewer pit, or groundwater seeping through cracked pit walls. The pump is healthy but overwhelmed. Common after big storms — and a sign the pit needs attention, not the pump.
Whatever the cause, the diagnostic process is the same: megger and amp testing, the float run through a full cycle, the valve and discharge checked. Most faults are fixed in a single visit — see our pump repairs page for how that works.
Alarm sounding right now? Tell us what the panel's showing.
📞 0415 210 267Call tonight, or book for tomorrow?
An honest framework — the same one we use on the phone when you call after hours.
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Call now — don't wait
- Sewage is overflowing, or the pit level is visibly rising
- Drains, toilets or floor wastes are backing up into the house
- The breaker trips again immediately after one reset
- It's a shared or strata system serving multiple units
- You can smell sewage strongly inside or around the building
- There's a single pump and it's clearly not running at all
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Can usually wait for a booked visit
- The alarm fired once, the pump caught up, and the level is back down
- It's a dual-pump system and the second pump is still keeping up
- The alarm only sounds briefly during heavy water use, then clears
- It sounded during a storm but the system has recovered since
- The buzzer was silenced and the level has stayed steady for hours
Not sure which column you're in? Call anyway — it costs nothing to ask, and we'd rather talk you out of a night callout you don't need than have you flooded by morning. Our emergency pump services page covers how after-hours callouts work.
The operator you're calling at 2am
When the alarm's going and the pit is filling, you want to know exactly who's turning up. Here's what backs the van.
AS/NZS 3500 standards
Plumbing and drainage work is carried out to the AS/NZS 3500 standard family — the benchmark for compliant work across Sydney.
Restricted Electrical Licence — Motors
Issued by NSW Fair Trading under the disconnect/reconnect framework (UEERL0004). We connect the pump and alarm, set up the control panel and fit the overload protection ourselves; your electrician runs the supply.
Confined Space Entry certified
Statement of Attainment from Pinnacle Safety and Training (RTO 40496). Deep pits and confined spaces are part of the trade — most residential pits never need it, but when one does, we're set up for it.
Fully insured
Public liability and workers compensation cover in place across all work, with certificates of currency available on request.
Specialist focus since 1985
A plumbing trade since 1985, pumps-only since 2010. You deal with the same operators from first call through to commissioning.
Pump alarm FAQs
Straight answers about sewer pump alarms.
What does a sewer pump alarm actually mean?
One thing: the water level in the pit has risen higher than it ever should. That means the pump either isn't running — no power, stuck float, failed motor — or it's running but not moving water, because the impeller is jammed, the non-return valve has failed, or the discharge is blocked. The alarm doesn't tell you which; that's what the diagnostic visit is for.
Can I just silence the alarm and deal with it later?
You can silence the buzzer if the panel has a mute button — but the alarm condition is still there, and the pit is still too full. If you mute it and keep using water as normal, the next warning you get is sewage at the lowest drain in the house. Silence it for your sanity, cut water use, and get it looked at promptly.
Will the alarm reset itself once the level drops?
On most panels, yes — if the pump catches up and the level falls, the alarm clears. But an alarm that fired has already told you something: the pit filled faster than the pump could empty it. Once is worth watching; repeatedly is a fault that will only get worse. If it's becoming a pattern, see our pump repairs page.
Can I keep using water while the alarm is going?
Keep it to an absolute minimum. Everything that goes down a drain ends up in the pit, and the pit is already at its alarm level. Essential toilet flushes only — no showers, no washing machine, no dishwasher — until the pump is running again.
Is a sewer pump alarm at night an emergency?
It depends what's behind it. A dual-pump system where one pump is still keeping up can usually wait for the morning. A single-pump system that's down, a rising pit, or sewage backing up indoors can't. Call us either way — we answer 24/7 and we'll tell you honestly whether it needs a night callout or a booked visit. See our emergency pump services page for how after-hours callouts work.
How do I stop the alarm happening again?
Almost every alarm callout we attend traces back to a pit that hadn't been serviced. A fouled float, fat buildup, a tired non-return valve and a motor with falling insulation resistance all show up on a routine service visit — before they fail the pump at 11pm. See our pump servicing & maintenance page.
Don't wait for the overflow.
An alarm that fired has already given you your warning. Tell us what it's doing — we'll tell you honestly whether it's tonight's problem or tomorrow's booking.