Grease Trap Installation Information & Regulations

Grease Trap Regulations

Regulations around the installation of a grease trap are quite extensive. Different property types also vary the regulations. Most rules or regulations are to in place by the Health Department.  Our plumbing codes and standards are also based on the Health Departments Standards. Therefore understanding these plumbing codes and requirements is imperative to any successful grease trap arrestor installation or repair.

Pipe Work on a Grease Trap Installation of a Fibre Glass 1000lt

Pipe Work on a Grease Trap Installation of a Fibre Glass 1000lt


Grease Trap Installation in a carpark

Grease Trap Installation in a Car Park

Grease Trap Installations whether it is a replacement or a brand new installation it is very important that all regulations are followed. All Councils and Water Authorities are extremely concerned about grease traps being installed 100% correctly. For this reason only use a plumber with proof of experience.

Need a Grease Trap Installed?

Common Concerns regarding Grease Trap Installations

Installing the Grease Trap tank whether above or below the ground is only about 60% of the job completed when is comes to gaining an Approval from the local Water Authority and Trade Waste Inspections

Extras in relation to grease trap needs. Designing the drainage and venting system which is unique to grease trap installations, Water protection devices, and certain floor drainage components amongst others.

Our aim is to provide you with a quotation that totally completes and meet all of Sydney Water approvals. You may feel that our quote is higher then others that have priced your job but we can assure you that we do not hide information with the purpose of gaining variations later or misleading you.

Variations that may come up are only if you change your plan or we hit rock or obstacles like electrical pipes that prevent the work from carrying on as per plan during excavation work. These are mentioned in all our quotations. All of our prices are open from the beginning so you are aware of the total cost to gain the appropriate approval.

Look forward to hearing from you soon.

Scooper Plumbing has the experience to install all types of Grease Traps in many different property layouts. Grease Trap Systems that you may be aware of are below ground to above ground tanks. We have also installed Grease Traps on the top of a building to others that are just behind the kitchen. We are able to work out the best possible way for a Grease Trap to be installed at your business.

Whether you choose to use Scooper Plumbing or not, please make sure that you choose a plumber that has lots of experience installing Grease Traps. Here are some good sound reasons for this.

1:  If the plumber is not familiar with the excessive amount of rules surrounding grease trap installations then in most cases the grease trap is installed incorrectly and your business can not be opened until the Water Authority has approved of the installation.  This may cost you thousands in lost revenue.

2: The plumber who is not so experienced may promote a system that is technically ok but not the best or cheapest option for your business.  Sometimes a long term few and a minor change at the construction stage may save thousands over the next 5 year period as well as long in to the future.

3:  The wrong choice of grease trap and the wrong sizing can be a thorn in the flesh.  Pump systems are great and in some cases the only possible option, but they come with a bitter twist as the fail when you are at your busiest period in the week.  We always have to run out at 9PM on a Friday or Saturday night to attempt to repair a blocked or burnt out grease trap pump system.  Try to visualise the kitchen floor we all your staff and a few inches of kitchen sink water around your feet and everything up on the benches and you still have order banked up in front of you.  This visual is repeated regularly.  It does cost some money to repair or replace a grease trap pump in and emergency and sometimes it just can not be done on the spot.  In many of these situations a in ground gravity grease trap system could have been installed and would have cost the owner only about a $1000 more.  Why was the wrong system put in you may wonder.  Maybe the benefits were not discussed early.

Frequently Asked Questions:

Q: What Businesses require a Grease Trap?

A: Mainly Cafe’s, Restaurants, Bakeries, Takeaways, Butcher’s shops and various other food preparation businesses. The purpose of a Grease Arrestor/Trap is to keep the fats and oils out of the Authorities sewer lines and they also serve as a means of preventing blocked drains on your property. The main reason for complying with the Regulations is that your business will not be able to open unless the list of requirements regarding Grease Trap installations are met. Most Council Authorities and the Health Department regulate that they are installed and inspected to meet their conditions.

Q: What size Grease Trap Do I need?

A: Refer to the table below for help. Keep in mind though that if you are not a business that has sit down customers such as a Take away or a Food Preparation business then you fit into the category of Grease Traps fewer than 69 seats. A point of caution is that if you have a small Grease Trap and a large water usage then you may find that you have to have your Grease Trap cleaning pumped out regularly. As pump outs are over $200.00 each time, the cost of installing a larger system may be the most cost effective option. Deciding to install a Grease Trap at your business is not for those interested in being involved in this business for only a few years, but rather you are expecting be in this business for the long term. With this in mind, a bigger Grease Trap can be Cheaper. Something to ponder over.

Examples of Uses:

Canteens, Cafeterias, Restaurants, Food Courts etc.

Grease Arrestor Capacity

Weight (Kg) Approx.

Discharge up to 1,100L/day, typically up to 69 seats

500 litre


Discharge up to 1,100L/day, typically up to 69 seats

1000 litre


Discharge up to 3,200L/day, typically 70 to 199 seats

1500 litre


Discharge up to 6,400L/day, typically 200 to 399 seats

2000 litre


Discharge up to 9,600L/day, typically 400 to 599 seats

3000 litre


Discharge up to 12,800L/day, typically 600 to 799 seats

4000 litre


Discharge up to 16,000L/day, typically 800 to 1000 seats

5000 litre



Q: How often do I need to have the Grease Trap Cleaned out?

A: Many local Authorities require that the system be cleaned out every 13 weeks to start with. A Trade Waste Inspector will visit your premises from time to time to inspected the “Fatty Crust” or grease build up. He will then decide that your system needs to be cleaned out more or less often. It is not base on an opinion but on the measurement the Inspector records. Bigger systems always cost less in the long run, because your on going costs are less.

Q: What type of System should I get?

A: It will depend on the position the Grease Trap is to be installed. We alternate between two Companies solely based on the actual ability to fit it through door ways, take them up or down stairs or fit them in that room. Each choice is site specific. Both Companies make great products. The two types of systems that we personally recommend are a Fibre Glass and the Poly/Plastic tanks. Both are made to meet all of your Local Authority Standards and are long lasting. Concrete tanks need to be Epoxy lined each year. This can be very costly. One company makes the High Quality Fibre Glass Grease Traps and other Tanks and the other Company makes High Quality Poly/Plastic Grease Traps and other Tanks. Both systems come with industry standard 7 year warranties.

Q: Can I have an above ground tank instead of an in-ground Grease Trap?

A: You can, but if the kitchen floor is lower then the top of the Grease Trap then in this case you will need a pump to push the water into the trap. The pumps are costly and sometimes the installation costs are very similar between an above ground and in-ground system.

If gravity fall is not obtainable on a below ground system then Risers are available in various sizes.

Location Lid Options:

a. Fibreglass or Plastic lids for garden beds.

b. Light Duty Class B – Pedestrian trafficable gas tight.

c. Heavy Duty Class D – Cars, Trucks, Semi Trailers and Forklifts

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