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Grease Trap Pumping in New Hampshire

Avg. $200 - $800 · Every 1-3 months for restaurants

Cities

$200 - $800

Avg. Cost

Grease trap pumping is a critical maintenance service for restaurants, commercial kitchens, food processing facilities, and any business that discharges fats, oils, and grease (FOG) into its wastewater. Grease traps (also called grease interceptors) capture FOG before it enters the sewer system or septic tank, where it would cause devastating clogs and backups. Local health codes and environmental regulations typically require grease traps to be pumped when the combined grease and solids layer reaches 25% of the trap's capacity — for busy restaurants, this often means pumping every 1 to 3 months. During service, a vacuum truck removes all contents from the trap, including the floating grease layer, settled food solids, and wastewater. The technician will scrape the trap walls, inspect baffles and flow restrictors, and verify the trap is functioning correctly before refilling with clean water. Failure to maintain grease traps can result in sewer backups, foul odors, health department citations, fines of $1,000 or more per violation, and even forced closure. Many jurisdictions require businesses to maintain a pumping log and produce records during health inspections. Professional grease trap services often include manifesting and proper disposal of collected waste at approved facilities.

New Hampshire Regulations for Grease Trap Pumping

New Hampshire regulates onsite septic systems through the NH Department of Environmental Services (NHDES), Subsurface Systems Bureau. The governing rule is Env-Wq 1000, the Rules for the Design, Installation, and Maintenance of Disposal Systems. All new installations and major repairs require a permit from NHDES. A site-specific design must be prepared by a Licensed Site Evaluator or Professional Engineer and submitted to NHDES for review before a permit is issued. The state enforces setback requirements of 75 feet from surface waters, 75 feet from private wells, and 20 feet from property lines. New Hampshire requires a completed as-built plan to be filed with the town clerk and NHDES within 30 days of system completion. Shared systems serving two or more dwellings require an operation and maintenance plan approved by NHDES. The Shoreland Water Quality Protection Act adds additional siting restrictions within 250 feet of designated water bodies.

Licensing Requirements

New Hampshire licenses Site Evaluators through NHDES under Env-Wq 600 rules. Applicants must pass a written and field examination, demonstrate two years of supervised experience, and hold a degree in soil science, environmental science, or a related field. Septic installers must be licensed by the NH Office of Professional Licensure and Certification as a Site Evaluator or Septic System Evaluator. Pumping and septage hauling companies must register with NHDES and comply with solid waste transportation rules. Site Evaluators must complete 20 continuing education credits per two-year renewal cycle.

Environmental Considerations

New Hampshire's soils are predominantly glacially derived, with thin, coarse-textured soils over fractured bedrock — a combination that accelerates percolation but reduces natural filtration distance. The White Mountains region has extremely shallow soil horizons requiring engineered systems on most lots. The Lakes Region, with its hundreds of lakes and ponds, imposes strict setback requirements that constrain system placement for lakefront properties. Seasonal frost depth of 40 to 60 inches in the north requires deep tank burial or insulated components. Arsenic and radon in bedrock groundwater heighten the importance of maintaining proper separation distances between septic systems and private wells.

Signs You Need Grease Trap Pumping

Slow drains in the kitchen, especially floor drains and sink drains
Foul odors coming from drains or the grease trap area
Grease visible in the trap when the lid is opened
Health department notice or citation for trap maintenance
Grease backup into sinks or onto the floor
It has been more than 90 days since the last pumping

The Grease Trap Pumping Process

1 Access the grease trap and remove the lid for inspection
2 Measure the grease and solids accumulation levels
3 Pump out all contents — grease, solids, and wastewater — with a vacuum truck
4 Scrape trap walls, baffles, and lid to remove adhered grease
5 Inspect baffles, flow control devices, and trap integrity
6 Refill with clean water, document the service, and provide compliance records

Frequently Asked Questions — Grease Trap Pumping in New Hampshire

How often does a grease trap need to be pumped?

The industry standard is the 25% rule: pump when combined grease and solids reach 25% of trap capacity. For most restaurants, this means every 1-4 weeks for small under-sink traps (20-50 gallons) and every 1-3 months for large exterior interceptors (1,000-2,000 gallons). Many jurisdictions mandate pumping at least every 90 days regardless of accumulation levels.

How much does grease trap pumping cost?

Costs depend on trap size: small under-sink traps (20-50 gallons) cost $75-$250 per pumping, medium exterior traps (200-500 gallons) cost $150-$400, and large interceptors (1,000-2,000 gallons) cost $300-$800. Scheduled service contracts reduce per-visit cost by 20-35% compared to on-demand calls. Annual grease trap maintenance for a typical restaurant runs $2,000-$6,000.

What happens if I do not pump my grease trap?

Neglected grease traps cause sewer line blockages, foul odors, health department citations ($250-$10,000 per violation), potential temporary closure orders for repeat violations, and sewage backups into your kitchen. For restaurants on septic systems, grease entering the tank causes accelerated scum buildup, outlet blockage, and premature drain field failure ($10,000-$25,000 to replace).

Do I need a grease trap if my restaurant is on septic?

Absolutely — and sizing should be more generous than minimum requirements. Grease that bypasses or overwhelms the trap enters your septic tank, where it accumulates faster than bacteria can break it down. This leads to scum layer buildup, blocked baffles, and grease reaching the drain field where it permanently clogs soil pores. Restaurants on septic should also pump their septic tank annually rather than the standard 3-5 years.

Find Grease Trap Pumping in New Hampshire Cities

Browse 2 cities in New Hampshire for grease trap pumping providers.

Concord, NH Pop. 43,976

Manchester, NH Pop. 115,644

Other Services in New Hampshire

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Grease Trap Pumping in New Hampshire

New Hampshire Regulations for Grease Trap Pumping

Licensing Requirements

Environmental Considerations

Signs You Need Grease Trap Pumping

The Grease Trap Pumping Process

Frequently Asked Questions — Grease Trap Pumping in New Hampshire

Find Grease Trap Pumping in New Hampshire Cities

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