Under-sink units in Fort Collins restaurants collect fats, oils, and grease that thicken quickly once winter temperatures drop below freezing in the semi-arid climate. Older buildings around Old Town and near Colorado State University often have tighter cabinet access and older drain lines that trap sediment from Horsetooth Reservoir water, requiring smaller-diameter hoses and more frequent scraping to avoid backups into prep sinks.
Prospect Park and Harmony commercial spaces frequently route under-sink traps into shared laterals that run under parking lots with minimal slope. In these setups, even moderate FOG accumulation can create upstream pressure when warm summer irrigation runoff raises groundwater levels, pushing grease back toward floor drains during peak lunch service.
Technicians working Downtown Fort Collins commonly encounter cast-iron traps installed in the 1970s and 1980s that have interior scale reducing capacity by half. These units demand hand removal of hardened layers before pumping to prevent cracked lids or broken baffles that would otherwise send grease into the city sewer line toward Loveland or Windsor treatment plants.
Service calls in Larimer County also account for seasonal swings: cold winters cause grease to set like wax inside the trap, while summer heat liquefies it and allows it to migrate farther into the outlet pipe. Proper cleaning therefore includes both mechanical agitation and verification that the outlet remains clear before the unit is reassembled.
Technician insight
In Fort Collins, the thing that catches most people out with under-sink grease trap cleaning is how fast grease sets solid once overnight lows hit the teens around Prospect Park and Old Town. The semi-arid winters turn what looks like a simple pump job into a scraping job that takes twice as long if the trap sits in an unheated cabinet.
Old Town restaurant backup
A Downtown kitchen near Old Town Square reported slow sink drainage during lunch rush. The under-sink trap had a thick layer of winter-hardened grease against the outlet baffle. After scraping and pumping, flow returned and the line stayed clear through the following weekend service.
Under-sink Grease Trap Cleaning Services We Offer
✓Under-Sink Grease Trap Pumping
Removes accumulated FOG from under-sink units in restaurants near Old Town Square and Colorado State University before it reaches the main line.
✓Trap Lid and Gasket Replacement
Inspects and swaps worn lids and seals on under-sink traps common in older Prospect Park and Harmony commercial buildings to stop odors and leaks.
✓FOG Buildup Scraping
Manually breaks and removes hardened grease layers inside under-sink traps after cold Fort Collins winters have solidified material against the walls.
✓Outlet Line Clearing
Clears partial blockages in the short outlet pipe that runs from under-sink traps into shared laterals serving Downtown and Larimer County kitchens.
✓Pre-Inspection Trap Assessment
Documents trap condition and remaining capacity for restaurant operators preparing for health inspections in Old Town and near Horsetooth Reservoir.
Under-sink Grease Trap Cleaning Cost in Fort Collins, CO
| Service | Typical Range | What Affects It |
|---|---|---|
| Standard under-sink trap pumping | $225–$350 | Accessible units in newer Harmony kitchens with light buildup |
| Heavy buildup scraping and pumping | $375–$550 | Older cast-iron traps in Old Town buildings after winter hardening |
| Outlet line clearing add-on | $125–$200 | When sediment from shared laterals restricts flow |
| Lid or gasket replacement | $85–$160 | Parts and labor for damaged covers common in Downtown restaurants |
Ranges are typical for Fort Collins, CO and confirmed with an exact written quote before any work starts.
How it works
- 1
Site Assessment
Technician locates the under-sink trap, checks cabinet access, and notes pipe routing in the specific Fort Collins building.
- 2
Mechanical Agitation
Breaks up cold-weather hardened grease and sediment using hand tools sized for the trap diameter.
- 3
Pumping and Removal
Extracts liquefied and solid material into a sealed container for transport to approved disposal sites serving Larimer County.
- 4
Outlet Verification
Runs water through the outlet line and confirms flow before reinstalling the lid and gasket.
Pricing
Most under-sink jobs in Fort Collins range from $225 to $550 depending on trap size, access, and buildup severity.