Commercial Grease Interceptor Installation & Service

Grease interceptors are essential for preventing fats, oils, and grease (FOG) from entering sewer systems and causing blockages, backups, or violations. D.M. Kelly Mechanical provides commercial grease interceptor solutions for restaurants, commercial kitchens, food processing facilities, schools, and multi‑tenant properties. Whether you’re installing a new interceptor, replacing an undersized unit, or upgrading to meet current code, our team ensures proper sizing, placement, and long‑term performance.

What We Offer

• Grease Interceptor Installation — New installations for commercial kitchens, tenant improvements, and new construction, properly sized to meet usage and code requirements

• Grease Interceptor Replacement — Removal and replacement of damaged, failing, or undersized units to restore compliance and performance

• System Evaluation & Sizing — Assessment of flow rates, fixture counts, and facility demands to ensure the correct interceptor type and capacity

• Piping & Connection Modifications — Proper inlet/outlet piping, venting adjustments, and system integration for safe, efficient operation

• Compliance Support — Installations completed to meet local plumbing codes, health department standards, and municipal requirements

Signs You Need Service

• Frequent drain clogs or slow drainage in kitchen fixtures

• Foul odors coming from drains or interceptor areas

• Grease backups affecting sinks, floor drains, or dishwashers

• Failed inspections or code compliance notices

• An interceptor that is undersized for current kitchen usage

• Physical damage, corrosion, or leakage around the interceptor

• Facility expansion or kitchen upgrades requiring system changes

Neglecting grease interceptor issues can lead to costly plumbing failures, shutdowns, and violations. If you’re experiencing any of these problems, our team can assess your system and recommend the right solution.

Common Questions

Which facilities require grease interceptors? Most commercial kitchens, restaurants, cafeterias, food processing facilities, and institutions that generate grease‑laden waste are required to have grease interceptors.

How is a grease interceptor sized? Sizing is based on fixture count, flow rate, kitchen usage, and local code requirements. We perform detailed assessments to ensure proper capacity and compliance.

Can you replace an undersized or outdated interceptor? Yes. We frequently replace interceptors that no longer meet demand or code requirements due to facility expansion or menu changes.

Do grease interceptors require maintenance after installation? Yes. Regular cleaning and pumping are required to maintain performance and compliance. While pumping is typically handled by specialty providers, we ensure the system is properly installed for effective maintenance access.

Do grease interceptor installations require permits? In most cases, yes. We handle permitted installations and ensure all work meets applicable plumbing and health department codes.