A new dumpling kitchen in Logan Village had a fitout planned and a launch date to hit. Before service could start, the site needed grease trap installation, compliant trade waste drainage, backflow protection at the hosetap, and a washdown corner for staff.
Existing concrete covered the area for the underground work. Citi Industries handled the groundwork, so the operator could focus on the food.
Project Overview
The kitchen needed drainage for food preparation, washing dishes and cleaning. Its wastewater could carry fats and oils, so the planned grease trap would intercept them. The new pipework also had to reach fixtures throughout the tenancy.
Customer-supplied fixtures included the basin, sinks, dishwasher and tapware. New water and waste lines had to reach each fixture shown on the plan.
Scope of Work
- Installed a 1,000-litre below-ground grease trap with a Class D vehicular traffic lid.
- Scanned, cut and removed affected concrete, then reinstated it after the underground plumbing work.
- Barricaded the affected area to protect pedestrians during groundworks.
- Ran trade waste drainage through the tenancy, connected fixtures and vented the tank and new line to the atmosphere.
- Installed two kitchen bucket traps for cleaning wastewater.
- Fitted one RPZD backflow valve at the closest hosetap.
- Completed hot and cold water rough-ins and sanitary plumbing.
- Connected the customer-supplied basin, wash sink, prep sink, dishwasher and tapware to water and waste services.
Challenges
Working Beneath Existing Concrete
The grease trap and drainage needed space under existing concrete. Pedestrians also needed protection while the floor was open.
Buried services were another concern. The crew had to locate them before cutting into the concrete and excavating for the new pipes.
Routing Drainage to the Kitchen Layout
Sinks and the dishwasher needed waste connections following the tenancy drawings. Cleaning water needed its own collection points rather than relying on food preparation sinks.
The drainage route had to serve both the kitchen fixtures and the cleaning points.
Protecting the Hosetap Supply
A backflow valve was needed at the closest hosetap. Without it, contaminated water could travel backwards towards the drinking water supply during cleaning.
New hot and cold water lines also had to reach the fixtures supplied by the customer.
Solutions
Preparing the Site and Opening the Concrete
The crew scanned the concrete before cutting and removing the affected sections. They barricaded the work area while excavating for the tank and drainage.
Once the pipes were in, the crew reinstated the concrete around the underground plumbing.
Installing the 1,000-Litre Grease Trap
Citi Industries installed the 1,000-litre grease trap below ground with its Class D lid. The cover had the specified vehicular traffic rating and allowed access for future cleaning and maintenance.
The trap gave fats and oils a place to separate before wastewater flowed downstream. New drainage connected the tank to the kitchen fixtures.
The tank and pipework were part of Citi Industries’ grease trap design and installation services.
Connecting Trade Waste Drainage and Vents
Inside, the crew ran new trade waste drainage and connected the planned kitchen fixtures. They also vented both the grease trap and the new waste line to the atmosphere.
For this installation, the work followed Logan City Council’s trade waste guidance for managing kitchen wastewater. The team completed sanitary drainage work within the framework of the Queensland Plumbing and Drainage Act 2018.
Both the tank connection and the kitchen waste line followed the agreed layout. That route allowed wastewater from the planned fixtures to pass through the grease trap.
Creating the Kitchen Washdown Area
The crew fitted two bucket traps in the kitchen. One went into the planned washdown corner, where staff could empty buckets and hose down.
The other bucket trap was connected at its planned kitchen location.
Connecting Water and Installing Backflow Protection
Citi Industries completed hot and cold water rough-ins and sanitary plumbing for the tenancy. The team connected the customer-supplied basin, wash sink, prep sink, dishwasher and tapware.
Hot water came from the existing kitchenette unit, so the crew connected the new lines to that supply.
At the nearest hosetap, the team fitted a reduced pressure zone device, or RPZD. This backflow valve helped protect the drinking water supply against reverse flow.
The work met AS/NZS 3500 plumbing and drainage standards for water services and sanitary connections. Citi Industries’ commercial plumbing services included the required internal pipework and fixtures.
Final Outcome
By July 2025, the kitchen was fully operational with compliant trade waste drainage to every fixture, a dedicated washdown corner, and backflow-protected water services at the hosetap.
Grease Trap Installation for Commercial Kitchens
Citi Industries provides commercial grease trap installation and plumbing for food-service tenancies across Logan and South East Queensland. The team works on kitchen drainage, water connections and grease trap projects.
Planning a kitchen fit-out in Logan Village? For grease trap installation or related plumbing, get in touch with our team. Call Citi Industries on 1300 002 484.
1300 002 484
