Grease Trap Systems Guide

Grease traps (also called grease interceptors) are essential plumbing devices designed to capture fats, oils, and grease (FOG) before they enter the wastewater system. These systems prevent costly plumbing emergencies and protect municipal sewer infrastructure while helping businesses comply with local regulations.

This comprehensive guide will help you understand grease trap systems, their installation requirements, maintenance procedures, and best practices to keep them functioning effectively.

Types of Grease Trap Systems

Grease trap systems come in various designs, each suited for different applications:

• Passive Grease Traps: Small, under-sink units for light-duty applications like small cafes or residential kitchens
• Gravity Grease Interceptors (GGI): Large capacity concrete or fiberglass units typically installed underground outside the facility
• Hydromechanical Grease Interceptors (HGI): Medium-sized units that can be installed indoors, using internal baffles to separate FOG
• Automatic Grease Removal Devices: Self-cleaning systems that automatically remove accumulated FOG

The most expensive grease trap is the one that isn't maintained properly. Regular service not only ensures compliance but can extend the life of your system by years while protecting your entire plumbing infrastructure.

- Alpha Septic Services

Sizing and Installation Considerations

Proper sizing is critical for effective grease trap function. Undersized traps will require more frequent pumping and may lead to sewer backups, while oversized units can create waste treatment problems. Factors affecting proper sizing include:

Maintenance Essentials

Regular maintenance is vital for keeping grease trap systems functioning effectively. Alpha Septic Services recommends the following maintenance schedule:

• Small passive traps: Weekly inspection, cleaning every 1-3 months
• Hydromechanical interceptors: Monthly inspection, pumping every 2-3 months
• Large gravity interceptors: Quarterly inspection, pumping every 3-6 months
• Automatic removal units: Weekly maintenance check, quarterly professional service

The 25% rule is a good guideline for all grease trap systems: when the combined volume of FOG and food solids reaches 25% of the trap's capacity, it's time for pumping service.

Warning Signs of Grease Trap Problems

Be alert for these indicators that your grease trap needs immediate attention:

• Slow drains in kitchen sinks and floor drains
• Foul odors around drains or from the grease trap area
• Wastewater backing up into floor drains or sinks
• Visible grease accumulation in plumbing fixtures
• Multiple drain clogs occurring frequently
• Notice of violation from local wastewater authorities

Best Practices for FOG Management

Beyond regular pumping, these best practices will help maintain your grease trap system:

• Train staff to scrape dishes into trash before washing
• Install drain screens to catch food particles
• Post "No Grease" signs above sinks
• Avoid using garbage disposals on grease trap lines
• Never pour fryer oil down drains
• Keep maintenance records and inspection reports

Alpha Septic Services provides professional grease trap pumping, cleaning, and maintenance for all types of grease interceptor systems, tailored for commercial kitchen needs throughout the Austin area. Our technicians are trained to handle everything from small under-sink units to large in-ground systems, providing proper disposal documentation and helping you maintain compliance with local regulations.