The Difference Between Septic and Sewage Holding Tanks

If your property isn’t connected to the main sewer, you’ll need a system to manage wastewater. Usually, that’s either a septic tank or a sewage holding tank. Both store wastewater, but they work very differently, and knowing the difference will save you headaches, money, and frustration.

At Express Wastewater, we help homeowners, businesses, and rural properties choose the right system, install it safely, and maintain it for long-term use.

What is a Septic Tank?

A septic tank is a self-contained wastewater treatment system that doesn’t just store waste but treats it naturally. Here’s how it works:

Wastewater leaves your home and enters the tank
Solids settle at the bottom
Oils and grease float to the top
Liquid wastewater flows out into the drain field or absorption system
Natural bacteria break down the waste over time

The Benefits Include:

Treats wastewater on-site
Reduces how often it needs emptying
Safer for the environment
Can last 20+ years with proper maintenance

For more information on how a septic tank works, read our How Does a Septic Tank Work?

What is a Sewage Holding Tank?

A sewage holding tank simply stores the waste and does not treat the wastewater. As they are just storage for waste they need to be emptied more frequently or they are a serious health hazard. They work by:

All wastewater from your property flows into the tank
Waste stays there until it is emptied by a licensed contractor
If the tank fills up and isn’t emptied, it can overflow and cause odours or contamination

The Benefits Include:

Can be installed almost anywhere
Works where septic systems aren’t allowed
Flexible for temporary sites or limited land

How To Choose The Right Waste System For Your Needs?

Choosing the right system depends on:

Property size and layout
Soil type and drainage conditions
Local council regulations
Wastewater volume
Budget for ongoing maintenance

Not sure which system is best? Express Wastewater can inspect your property and recommend the most cost-effective, long-term solution. We specialise in both septic tanks and sewage treatment systems for your home or property.

Signs You Need a New Waste System

Without regular maintenance these systems can become worn and a major health risk. Common signs you need a new system or professional assistance include:

Slow or blocked drains
Frequent plumbing issues
Strong sewage odours
Water pooling around your tank area
An old system that hasn’t been serviced in years

If you spot any of these signs, call our team immediately on 1300 770 594. Our team can provide early installation or replacements to prevent costly emergency repairs.

Maintenance Tips for Both Systems

Only flush approved materials no wipes, nappies, or grease
Don’t drive or park over your tank
Repair leaks quickly to prevent excess wastewater
Keep records of all maintenance and pump-outs
Schedule inspections with a licensed contractor

Our team can provide septic system servicing for all your maintenance needs.

Install or Upgrade Your Waste System Today

If you’re thinking about installing a septic or holding tank:

Call Express Wastewater for a site inspection
We’ll recommend the best system for your property
We handle installation, setup, and ongoing servicing
Enjoy peace of mind knowing your system is safe, compliant, and low-maintenance

If you would like more information on septic tanks or would like to have a septic tank system installed then talk to our team today at 1300 770 594. Alternatively, you can fill in our online quote form and one of our friendly staff will be able to assist you with your query.