Are you on sewer or septic?
Some properties on the edge of towns, on bush blocks or on private lanes use a septic or pump-out system. Look for a concrete or plastic lid in the yard, or check your rates notice or sewer service diagram. Sydney Water can tell you if sewer is available to your address.
Septic tank
A septic tank holds waste so solids settle and the liquid flows into an absorption area, such as trenches in the soil. Bacteria in the tank break down some of the waste.
A septic system can fail in two main ways. The tank fills with sludge and needs to be emptied. Or the absorption area clogs and the liquid has nowhere to go.
Pump-out system
A pump-out system, sometimes called a holding tank, stores waste in a sealed tank. A tanker empties it on a schedule. There is no absorption area, so the tank must be emptied before it overflows.
Signs of trouble
- Slow drains throughout the house
- Gurgling toilets
- Sewage smell near the tank or the absorption area
- Wet, green or spongy ground over the trenches
- Sewage backing up in the lowest fixtures
Keep children and pets away from wet patches that could be sewage. Do not open a tank lid yourself. Tank gases are dangerous.
What a plumber can and cannot do
A licensed plumber can clear a blocked pipe between the house and the tank, and between the tank and the outlet. Emptying a tank is usually done by a licensed liquid waste contractor with a tanker. Repairs to the treatment system or absorption area may need specialist work, and council approval.
Ask the plumber on the phone what they can do for your system, and what they would arrange through someone else. Ask whether it's needed for your job before agreeing to a pump-out.
Look after your system
- Have the tank checked and emptied as often as the maker or council advises
- Use septic-safe cleaners in small amounts
- Keep heavy vehicles and deep-rooted trees off the absorption area
- Spread laundry loads across the week
- Keep records of every service
Council rules
Councils regulate onsite sewage systems. Your council may need an approval to operate, repair or replace one. Check with council before any major change.
What it costs
It depends on the system, the access and the problem. Ask for a quote before work starts.
Blocked drain in the Blue Mountains?
Call 0495 053 644Septic and pump-out systems questions
How do I know if my home has a septic tank?
Look for lids in the yard, check your rates notice, or ask Sydney Water whether your address is connected to sewer.
How often should a septic tank be emptied?
It depends on tank size and the number of people. Many are emptied every few years. Follow your council's advice.
Why does my yard smell?
A smell near the tank or trenches can mean the system is full or the absorption area is failing. Have it checked.
Can a plumber empty my tank?
Usually a licensed liquid waste contractor does that. Ask the plumber when you call.
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