Serving Fairfield · Vacaville · Napa · Solano County · North Bay 📞 (707) 207-8288
Mobile · On-Site · California

Diesel Tank Cleaning
Done Right, On-Site

Sludge, water, and microbial growth collect at the bottom of every diesel storage tank over time. Pump N Polish removes it all on your property — no fuel hauled off-site, no hassle.

Schedule Tank Cleaning 📞 (707) 207-8288
✦Mobile On-Site Service
✦No Fuel Hauled Off-Site
✦Fairfield & Vacaville Based
✦Solano County & North Bay
✦Free Quote

What Is Tank Cleaning?

Your Tank Holds More Than Fuel

Over months and years, diesel storage tanks accumulate sediment, sludge, and water at the bottom. This contamination is invisible until it causes real problems — clogged filters, failed injectors, or a generator that won't start when you need it most.

Diesel tank cleaning goes beyond polishing the fuel itself. It removes the physical contamination that has settled on the tank floor and bonded to tank walls — contamination that fuel polishing alone cannot reach.

Request a Tank Inspection
Pump N Polish technician performing on-site diesel tank cleaning

Warning Signs

Your Tank May Need Cleaning If…

These are the most common signs that contamination has built up inside your diesel storage tank.

🔴
Filters Clogging Faster Than Usual
If you're changing fuel filters more frequently than expected, sediment from the tank bottom is likely circulating through your system.
💧
Water Found in Fuel Samples
Water enters tanks through condensation and faulty seals. It sinks to the bottom, accelerates corrosion, and fuels microbial growth.
🦠
Dark, Slimy Fuel or “Diesel Bug”
Dark color, slime, or a foul smell in your diesel points to microbial contamination. Bacteria and fungi thrive at the fuel-water interface.
⚡
Generator Fails to Start or Run Under Load
Emergency generators depend on clean fuel. Contaminated diesel in the day tank is a leading cause of generator failure when it matters most.
📅
Fuel Stored Longer Than 12 Months
Diesel degrades over time. Tanks holding fuel for extended periods build up oxidation byproducts and microbial colonies even without visible signs.
🏭
Tank Has Never Been Cleaned
Many tanks go years — sometimes decades — without a proper cleaning. A baseline inspection and clean brings the tank to a known, verified state.

Before & After

See the Difference Clean Fuel Makes

Contaminated diesel fuel sample — dark, cloudy, sediment present
⚠ Before — Contaminated Fuel
Dark color, suspended sediment, microbial haze, and water. This fuel is clogging filters and threatening equipment reliability.
Clean polished diesel fuel sample — clear and bright
✓ After — Restored & Clean