Flojet / ITT Macerator & Waste Pumps
Flojet / ITT Macerator & Waste Pumps: Engineering Cleaner Waste Handling
When it comes to emptying holding tanks on recreational vehicles and marine vessels, few names carry the credibility of Flojet / ITT. A brand long trusted by both the RV and boating communities, Flojet brings the same precision fluid-handling engineering found across its broader pump lineup directly into the demanding world of macerator and waste pumps — where reliability, speed, and hygiene are non-negotiable.
What Sets Flojet Macerator Pumps Apart
Flojet's macerator pumps are built around a core advantage: the ability to grind and move waste efficiently without the mess of traditional large-diameter sewer hose connections. The 18550-series and 18555-series models — Flojet's flagship waste pump lines — are engineered with a stainless steel cutter and wear plate that reduces waste particles to a maximum of 1/8" (approximately 3mm), enabling discharge through a standard garden hose rather than a bulky 3-inch sewer hose. This single design choice transforms waste tank service from a dreaded chore into a quick, clean task.
Both pump lines run on 12V DC power and feature self-priming flexible impellers, which means the unit can be mounted in a convenient location — up to four feet above the tank liquid level — without losing prime. The 18550-series delivers a flow rate of up to 3.6 GPM and can empty a typical 30-gallon holding tank in under three minutes, while the portable 18555-series steps up to 11 GPM max flow for even faster tank evacuation. The 18555 model connects directly to a standard 3" RV waste outlet and discharges through a garden hose, making it a truly portable, no-permanent-installation solution.
Safety and Durability Features
Flojet doesn't just move waste — it moves it safely. The fixed 18550-series pump motor is fully enclosed with a stainless steel shaft and complies with both USCG Regulation 183.410 and ISO 8846 MARINE standards for ignition protection, making it appropriate for fuel-vapor-sensitive marine environments. A built-in Impeller Protection Device (Run-Dry Protection) automatically shuts off the pump after approximately 20 seconds of run-dry operation to prevent damage during accidental dry cycling. Even serviceability is addressed: after extended periods of storage, a stuck impeller can be freed with nothing more than a screwdriver inserted into the motor shaft slot.
Flexible Discharge Options
One of Flojet's key selling points in this category is versatility of discharge. Unlike conventional dump-station-only solutions, Flojet waste pumps can route effluent to a home sewer clean-out, septic tank, toilet, or mobile waste wagon — giving RV and boat owners freedom from dump station dependency. The pump can move waste uphill and around corners, a critical advantage in tight RV bays or marina dock setups where gravity-feed isn't an option.
- Self-priming up to 4 feet above tank liquid level
- Stainless steel cutter reduces particles to 1/8" max for garden hose discharge
- USCG & ISO 8846 MARINE ignition-protection compliant
- Run-Dry Protection Device for automatic pump shutdown
- 12V DC operation — compatible with standard RV and marine electrical systems
- Compact and lightweight — the 18550-series weighs just 3.5 lbs
Whether you're outfitting a Class A motorhome or a marina-docked cruiser, Flojet / ITT macerator and waste pumps deliver the engineering quality and field-proven design that waste management demands.