The Flotec FPCI3350 is a 1/3-horsepower submersible primary sump pump for a conventional pit. Pentair lists a vertical switch for a 10-inch or larger basin, a 1-1/2-inch NPT discharge, an 8-foot grounded cord, handling of solids up to 1/4 inch, and a maximum lift of 22 feet. Its headline 4,200-gallon-per-hour capacity is measured at zero head.
Capacity must be checked at actual head
Zero-head flow is not the number a basement receives after water is lifted and pushed through pipe, fittings, a check valve, and an exterior discharge. Estimate vertical rise plus friction losses, then use Pentair’s performance curve at that operating point. Compare the result with observed pit inflow during heavy rain or snowmelt and leave sensible reserve capacity.
If water can enter faster than the selected pump moves it at actual head, a larger or differently configured system is needed. Oversizing can also cause short cycling in a small basin, so the pit and switch cycle matter alongside horsepower.
Fit and installation checks
The vertical float must move freely without touching the basin wall, pipe, cord, or incoming water. Confirm the pit is at least the specified size, the base is stable, and the discharge path will not freeze or send water back toward the foundation. Follow the manual for the check valve, vent hole if specified, union, electrical supply, and testing.
Use the grounded plug and required protected receptacle; do not cut off the grounding pin or use an extension cord. Water and electrical work require particular care, and a qualified plumber or electrician should handle uncertain plumbing, circuit, or code conditions.
Primary pump does not mean backup
The FPCI3350 depends on utility power and a clear discharge. It does not provide battery backup, generator connection, high-water notification, or a second pump. Homes with finished basements, frequent outages, or high inflow need a separate backup and alarm plan sized to the risk.
Verdict
The FPCI3350 is a defensible primary pump when its curve covers the measured head and inflow, the basin gives the float clear travel, and the owner has a separate outage plan. Do not select it from the 4,200 GPH zero-head figure alone.