
Fibreglass Grease Trap (Arrestors) & Grease Interceptors – Custom Solutions Sydney
If you run a commercial kitchen, café, food manufacturing facility, or any business that processes food, a grease arrestor (also known as a grease interceptor) is one of the most important installations you’ll need.
These units prevent fats, oils, grease (known as FOG), and food solids from entering the sewer system, protecting your pipes and the environment.
At Fiberglass Sydney, we design and manufacture high-performance fibreglass grease arrestors and grease interceptors, tailored to your business needs. Whether you need a compact under-sink unit or a large in-ground system, we can build it for you—custom sizes, custom fittings, and custom solutions.
What Is a Grease Arrestor (Grease Trap) or Grease Interceptor?
A grease arrestor (also called a grease interceptor) is a plumbing device designed to capture and separate fats, oils, and grease from wastewater before it flows into the sewer.
What’s the difference between a Grease Arrestor and a Grease Interceptor?
They are essentially the same product, with “interceptor” more commonly used in the USA and “arrestor” or “grease trap” in Australia. In Sydney and across NSW, “Grease Arrestor” is the preferred term used by Sydney Water and local councils.
These systems are legally required in all commercial kitchens and food outlets to prevent pollution, pipe blockages, and fines.
Why You Need a Grease Arrestor or Grease Interceptor

Wastewater from commercial kitchens carries a lot more than water—it’s loaded with:
- Fats and oils from cooking
- Grease and residue from food
- Detergents and solids from washing dishes
Without a grease arrestor or interceptor, this material flows into the sewer and solidifies over time.
Why Fibreglass Is the Smartest Choice?
At Fiberglass Sydney, we manufacture all our grease arrestors and interceptors from premium-grade fibreglass (FRP). Here’s why this matters:
- Corrosion Resistance - Fibreglass is naturally resistant to chemical attack, moisture, and corrosion—unlike steel, which can rust, or concrete, which can crack.
- Lightweight but Strong - Easier and safer to transport, manoeuvre, and install. Reduces site costs and eliminates crane requirements in many cases.
- Long Life Expectancy - Our fibreglass arrestors last decades with minimal wear. That’s real value for money.
- Low Maintenance - Smooth internal surfaces prevent build-up and make it easier to clean during scheduled pump-outs.
- Customisable - We can make it any size, shape, or configuration you need—tailored to your site layout and flow requirements.
Types of Grease Arrestors & Grease Interceptors We Offer
At Fiberglass Sydney, we understand every kitchen or facility is different. That’s why we offer a wide variety of grease traps and arrestors:
- 1. Under-Sink Grease Arrestors - Compact traps installed beneath kitchen sinks—perfect for cafes or small commercial kitchens.
- 2. Above-Ground Grease Interceptors - Freestanding units that sit on the floor or slab. Easy to access and maintain without excavation.
- 3. In-Ground Grease Arrestors - Large-capacity units installed underground for high-volume usage. Fully sealed and weather-resistant.
- 4. Kit-Form / Modular Grease Traps - Delivered in pieces and assembled on-site. Great for tight access jobs or regional installations.
- 5. Custom-Built Grease Arrestors - Have a tight space, special plumbing layout, or council compliance issue? We’ll build a trap to suit your exact specifications.
How Do Grease Arrestors / Grease Interceptors Work?
Grease arrestors work using gravity separation. When wastewater enters the trap:
- Fats, oils, and grease float to the surface
- Solids sink to the bottom
- Clean water exits through an outlet at mid-level
The trap holds the grease until a waste contractor pumps it out—usually every 1–3 months depending on usage.
Our design includes baffles, access lids, and cleanout ports for maximum performance and easy servicing.
Advantages of Fibreglass Grease Arrestors Over Other Materials
Feature | Fibreglass | Concrete | Stainless Steel |
---|---|---|---|
Corrosion Resistance | Excellent | Low | Moderate |
Weight | Lightweight | Heavy | Medium |
Lifespan | 30+ Years | 10–20 Years | 10–15 Years |
Customisability | Full | Limited | Moderate |
Maintenance | Easy | Difficult | Moderate |
Installation Cost | Lower | High | High |
Who Needs a Grease Arrestor / Interceptor?
If you handle food in any commercial setting, you’re likely required by local law or council to have a grease trap installed. We supply to:
Restaurants & Takeaways
Cafés & Coffee Shops
Bakeries & Catering Kitchens
Hotels & Function Centres
Schools & Universities
Hospitals & Aged Care
Supermarkets & Food Courts
Construction Site Kitchens
Food Production & Processing Plants
Sydney Water & Council Compliance
We understand how strict local councils and Sydney Water are when it comes to trade waste regulations. That’s why our traps are built to meet or exceed the technical specs for grease arrestors in NSW, including:
- Inlet/outlet pipe configurations
- Flow rate and retention time
- Access openings and lids
- Material strength and water-tightness
We can provide drawings, technical data sheets, and certification if required for your DA or council application.
Why Choose Fiberglass Sydney?
We’re not just a supplier—we’re a manufacturer, which means:
- You deal directly with the maker with 35+ years experience
- We can customise everything—size, shape, fittings, lids
- Fast turnaround from our Sydney-based workshop
- Local support and expert advice
- Long-term reliability with ongoing service available
Whether you’re a builder, plumber, project manager, or business owner, we’ll help you get the right solution, fully compliant and ready to install.
Our Process – From Quote to Delivery
We make it easy:
- Tell us your flow rate, site size, and service needs
- We’ll recommend or design a custom grease trap
- You’ll receive a quote and specs for approval
- We’ll manufacture and deliver to your site on time
- Need help with install or compliance docs? Just ask!
Get a Free Quote Today
Looking for a long-lasting, lightweight, fully compliant grease arrestor or interceptor in Sydney?
Let the experts at Fiberglass Sydney help you out. With years of experience in custom tank manufacturing, we’ll deliver a trap that meets your needs—and your budget. Call us now 0425 260 841 Or send an enquiry online.
Frequently Asked Questions (FAQ)
There is no major difference—both refer to the same product. “Grease arrestor” is the more commonly used term in Australia.
Typically every 1 to 3 months depending on your kitchen's output. Sydney Water may set the schedule as part of your trade waste agreement.
Yes, we calculate the right volume based on your kitchen’s flow rate and appliance setup.
Absolutely. We service Sydney and regional NSW, and can arrange freight to other states if needed.
Standard builds are ready in 10–15 working days. Custom units may take a bit longer depending on complexity.