grease trap

Regardless of whether you operate a construction fleet, a car wash, or industrial machinery, it’s essential to maintain your vehicles and tools in a clean, safe, and up-to-code condition. Wash bays are essential here.

We at Citi Industries understand the complexity of these rules. We provide wash bay systems that are entirely compliant and high-performance, helping businesses throughout Australia meet their requirements while also improving efficiency and sustainability.

This guide will tell you everything you need to know about the rules for wash bays in Australia.  What a wash bay is, the numerous kinds that are available, the laws that apply in each state, and how permanent and portable bays are different. You’ll also find helpful advice on design, size, rules for specific vehicles, and why dealing with professionals like Citi Industries is so important.

Let’s get started

What Is a Wash Bay?

A wash bay is a specially engineered space for cleaning cars, machines, and tools while making sure that wastewater is handled safely.  Wash bays are common in construction, mining, agriculture, transportation, and manufacturing. They assist in keeping the environment clean by catching and treating runoff before it is released. 

To meet environmental compliance regulations, they usually have high-pressure water systems, oil-water separators, suitable drainage systems, and water recycling units.  A properly-designed wash bay makes sure that commercial fleets and industrial machinery are cleaned well, work efficiently, and safeguard the environment. 

Let’s look at what a wash bay is and how it meets Australia’s wash bay criteria.

Types of Wash Bays

1. Permanent Wash Bays
Built-in systems for heavy use. Made with special drainage and filtration.

2. Portable Wash Bays
Easy to set up and flexible. Perfect for worksites that are only needed for a short time or that move around.

3. Car Wash Bays
To clean cars for personal or business use.  Built with water treatment that meets standards.

4. Industrial Wash Bays
Used in mining, manufacturing, or moving things around. Can deal with a lot of dirt, oil, and trash.

Requirements for wash bays in each state of Australia

State-Based Wash Bay Requirements in Australia

Adelaide (South Australia)

The South Australian EPA expects all wash bays to treat wastewater before disposal. Oil separation is mandatory.

Brisbane (Queensland)

DES Queensland enforces water capture and pollution control, especially in flood-prone zones.

Canberra (ACT)

ACT EPA outlines strict stormwater and sewer discharge policies. Trade waste consent is needed.

Darwin (Northern Territory)

Wash bays must minimise environmental risk in remote, sensitive zones per NT EPA regulations.

Hobart (Tasmania)

Tasmanian EPA mandates thorough wastewater control. Special rules apply near coastal or marine zones.

Melbourne (Victoria)

EPA Victoria requires that all water be treated before it is released. There are specific criteria for trade waste that wash bays must observe.

Perth (Western Australia)

The Department of Water and Environmental Regulation requires onsite water management systems and reuse technologies.

Sydney (New South Wales)

The NSW EPA says that systems must recycle water and control how it gets into sewer networks.

General Wash Bay Requirements Across Australia

No matter what state you’re in, all wash bays must have the following:

1. Wastewater treatment and drainage

• Must use separators for oil and water
• Keep pollutants out of the stormwater and sewer systems.
• Follow the rules for trade waste

2. Water Supply

• Can use either town water or water that has been recycled
• Must meet standards for flow and pressure of water

3. Environmental Protection

• Stopping pollution is really important
• Must follow building codes and environmental legislation

4. Site Design and Construction

• Follow the laws for safety and zoning in buildings
• Pick between designs with roofs and ones without roofs
• Make sure that cars can safely go in and out.

Permanent vs Portable Wash Bays: What’s Different?

Permanent Wash Bays:

• Infrastructure that stays in place
• Must follow the rules for constructing set by the council
• Need for complex wastewater systems
  

Portable Wash Bays:

• No permanent construction
• Still need mechanisms to catch waste

Perfect for procedures that are just temporary or moveable

Australian Guidelines for Wash Bay Size

The following standards are not required, although they do apply:

• Length: 6 metres minimum
• Width: 3 metres minimum
• Height Clearance: 3 metres
  Maneuvering Space: 1.5 metres on each side

The size of the custom parts depends on the type of vehicle and the space available.

Do Requirements Vary by Vehicle Type?

Yes, but the same regulations still apply.  Some common wash bays are:

• Truck wash bays
• Bus wash bays
• RV/caravan wash bays
• Equipment wash bays

All of them need to have the right drainage, oil separation, and environmental controls.

Let the pros handle the requirements

It can be hard to figure out what wash bay criteria are.  We make wash bays at Citi Industries that meet all state requirements.

We take care of everything, from systems for recycling water to ways to get rid of trade waste.  You don’t have to deal with councils and environmental authorities since our team does.

Talk to Citi Industries Today

Let Citi Industries build your next car or truck wash.  We make systems that work well and follow the rules for every industry.

The term “grease trap” is likely familiar to everyone who has a café, restaurant, or kitchen used for commercial purposes in Australia. But just what is it, and how important is it to running business operations? 

A grease trap is a plumbing appliance that traps and separates waste fat, oils, and grease (known as FOG) before entering the sewerage system. Without it, your plumbing system will be forced into shutdown, incur expensive blockages, and may even be fined by the environment. 

Let us put a spotlight on grease trap operations, grease trap needs, and the link of Citi Industries to Australian companies when it comes to ongoing compliance and efficiency.

Why Grease Traps Matter in Commercial Kitchens

FOG will find its way into your wastewater when you cook with oil, wash dishes, or clean greasy surfaces. Over time, grease hardens, adhering to pipes and causing clogging that wreaks havoc on public sewer systems and poses operational difficulties.

This is what grease traps are doing for your kitchen:

• Waste separation: It allows wastewater to stay long enough for solids to settle down and grease to float up.
  
• Protecting the infrastructure: It saves the pipes from clogging and emergency plumbing procedures that will cost you.
  
• Compliance with regulations: It helps your business fulfill requirements enforced by the water authority and local council.
  
• The green thing: Grease traps keep the fats and grease out of the waterways, therefore protecting the environment.
  

How Does a Grease Trap Work?

Now that you know what grease traps are, let’s discuss how they work. The principle applies to something large on the ground or a mini one under the sink.

Step-by-Step Process:

1. Wastewater Influx: Grease traps admit wastewater into their system through dishwashers and sink drains.
   
2. FOG Separation: As the system slows down, food particles will settle to the bottom while oils and fats will rise to the top.
   
3. Grease Capture: The middle layer of relatively clean water is discharged into the sewer system.
   
4. Clearing Cycle: After a while, any sludge and grease build-up must be removed, either by manual labour or mechanical processes.
   

The process extends the life of your pipes and keeps you within specifications by guaranteeing that only cleaner water floods the municipal drains.

Types of Grease Traps

When answering what a grease trap is, it’s helpful to know the types available. Your business size, kitchen output, and available space will determine the right option.

1. Passive Grease Traps

Also known as traditional or manual grease traps, these are usually made of stainless steel or plastic and installed under sinks or outside buildings. They’re simple, affordable, and ideal for small to medium businesses.

2. Automatic Grease Removal Units (AGRUs)

AGRUs are high-tech systems that skim grease into an external container for easy disposal. They’re efficient and suitable for high-volume kitchens.

3. Gravity Grease Interceptors

Installed underground, these large tanks suit bigger establishments or venues with multiple kitchen drains. They require scheduled pump-outs and professional servicing.

Who Needs a Grease Trap in Australia?

If your company cooks or serves food, you probably need a grease trap. Councils and water authorities throughout Australia require their use to reduce FOG pollution.

Businesses That Require Grease Traps:

• Restaurants and cafés
  
• Bakeries and takeaways
  
• Commercial kitchens
  
• Butcheries and seafood outlets
  
• Aged care facilities and hospitals
  
• School and university canteens
  

Still unsure what grease trap requirement is for your business? Citi Industries can assess your kitchen setup and local compliance standards to recommend the right solution.

Installing and Complying with Grease Traps

Grease trap installation is not a do-it-yourself task. To make sure your system complies with council, plumbing, and health codes, you need a qualified expert.

Key Considerations:

• Sizing: The trap must match the kitchen’s flow rate and volume.
  
• Placement: Proper location is critical to performance and ease of maintenance.
  
• Access: Grease traps must be easy to service and clean.
  
• Compliance: Each council has its own trade waste and plumbing rules.
  

At Citi Industries, we provide a tailored installation plan, including site evaluation, sizing, compliance advice, and long-term maintenance support.

Maintaining a Grease Trap: What You Need to Know

Understanding what a grease trap is goes beyond installation — maintenance is crucial to keeping your kitchen running smoothly.

How Often Should It Be Cleaned?

• Small units (under-sink): Every 1 to 4 weeks
  
• Large interceptors: Every 1 to 3 months
  
• AGRUs: Weekly or as per the manufacturer’s instructions
  

Signs It Needs Cleaning:

• Unpleasant odours
  
• Slow drainage
  
• Overflow or back-up
  
• Noticeable grease layer
  

Neglecting maintenance can lead to hefty fines, pipe blockages, and even business closures. Citi Industries offers scheduled servicing to keep your trap in peak condition.

The Environmental Benefits of Grease Traps

Let’s not forget the bigger picture. A properly functioning grease trap isn’t just about avoiding plumbing issues — it plays a part in protecting Australia’s natural environment.

Here’s what is grease trap doing for the planet:

• Preventing FOG from entering rivers and oceans
  
• Reducing wastewater treatment costs
  
• Supporting council waste-to-energy programs that recycle collected grease
  

By investing in a reliable grease trap, you’re helping reduce your carbon footprint while staying compliant.

Why Choose Citi Industries for Your Grease Trap Needs?

At Citi Industries, we understand the everyday demands of food businesses across Australia. We’ve helped cafés, commercial kitchens, and institutions answer what is grease trap and implement cost-effective, regulation-ready solutions.

Our Services Include:

• Site inspections and assessments
  
• System design and recommendations
  
• Installation by licensed professionals
  
• Maintenance plans and emergency servicing
  
• Compliance support and documentation
  

We simplify the process so you can focus on what matters most — running your business.

Final Thoughts: What Is Grease Trap and Why It Matters

So, what is a grease trap? It’s more than a box under your sink — it’s your first line of defence against costly plumbing issues, legal penalties, and environmental damage.

If you’re setting up a new kitchen or upgrading an old one, speak to the experts at Citi Industries. We’ll help you find the best grease trap solution that’s compliant, cost-effective, and built to last.

Need help choosing the right grease trap for your kitchen?
Contact Citi Industries today for expert guidance, installation, and ongoing maintenance that keeps your kitchen clean and council-approved.