Grease Trap Cleaning Christchurch

A commercial kitchen sends fat, oil and grease down its drains every day. A grease trap catches it before it reaches the public sewer, where it sets hard, blocks pipes and causes overflows. In Christchurch, a trap that is not maintained can cost you more than a blocked drain: it can put your trade waste consent at risk.

We size and install grease traps, clear and jet the kitchen lines that feed them, coordinate pump-outs with approved operators and keep the service records your consent depends on.

Pricing: quotes are free, and every job gets a fixed price before we start, so there are no surprises on the invoice.

Grease Trap Cleaning Jobs We Handle Across Christchurch

• Grease trap cleaning
• Grease trap installation
• Grease trap pump out
• Trade waste compliance
• Under sink grease trap cleaning
• Commercial kitchen drain jetting

What Christchurch's trade waste rules require

Christchurch City Council adopted its Trade Waste Bylaw 2025 on 7 May 2025, and it came into force on 1 July 2025, replacing the 2015 bylaw. Under it, businesses that discharge trade waste to the sewer need a trade waste consent. The main points for food businesses are:

• Permitted consents cover smaller discharges, under 1,245 cubic metres a year, that meet the bylaw's Schedule 1A, which includes cafés and restaurants
• Larger discharges, or those outside Schedule 1A, need a conditional consent
• Consents usually run for one to five years and do not transfer to a new owner
• Grease traps are pre-treatment devices and must be maintained and cleaned
• Waste must be removed by an approved operator and taken to an authorised processing plant
• Neglect can make the owner liable for sewer damage, and the consent can be withdrawn

How often should a grease trap be cleaned?

The council's bylaw does not set a single cleaning interval in the material we have seen, so the answer depends on the trap size, your menu and how busy you are. A small under-sink trap in a busy café may need attention far more often than a large in-ground trap serving a light lunch trade. Your consent conditions, if they set a frequency, always come first.

The national grease trap guidelines written for trade waste officers recommend pumping out before fats and solids take up too much of the trap's volume, because a full trap lets grease straight through to the sewer. We check the depth of the fat layer and solids at each service and recommend a schedule based on what we actually find.

How It Works

What a plumber does, and what the tanker does

Grease trap work is usually split between two jobs. The full pump-out of a trap's contents, and its disposal at an authorised plant, is done by an approved liquid waste operator. A plumber handles everything around the trap: clearing and jetting the lines from sinks and dishwashers, fixing baffles, lids and seals, replacing damaged pipework and installing or upsizing traps.

We work with approved operators so you have one contact for both. After each visit you get a written record of what was done, the condition of the trap and anything that needs attention, which is exactly what you want on file if the council asks. We also handle hydro jetting of kitchen lines that keep blocking downstream of the trap.

Sizing and installing a grease trap

A trap that is too small fills quickly and lets grease through. Sizing depends on the flow from your sinks and dishwasher, the type of food and the time water needs to sit in the trap for fat to separate. The Building Code's Acceptable Solution G13/AS2 covers grease traps nationally, and the council may set conditions in your consent.

Installing or relocating a trap often means drainlaying work, and on flat Christchurch land with high groundwater, especially in the east, an in-ground trap and its pipework need careful bedding and sealing. On a new fit-out, whether in a rebuilt central city building or a shop in Riccarton, we plan the trap location early so it can be reached for servicing without closing the kitchen.

Signs your trap or kitchen line is struggling

Book a service before it becomes an emergency if you notice:

• Sinks and floor wastes draining slowly
• A rancid smell around the kitchen or the trap lid
• Grease visible in the gully trap or the inspection point after the trap
• Water backing up into the trap or floor wastes
• No service record for the last few months

Why Choose Cheeky's Plumbers for Grease Trap Cleaning

Grease Trap Cleaning FAQs

Grease Trap Cleaning Across Christchurch

Our grease trap cleaning team works in every Christchurch suburb. Find your local plumbers:

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