Superior Pump residential submersible sump pumps (92250, 92341, 92572 and siblings): quick sheet

Covers: Superior Pump (Decko Products, Minneapolis) 120 V submersible sump pumps sold at hardware and home centers: 92250 (1/4 HP thermoplastic, tethered piggyback float), 92341 (1/3 HP cast iron, vertical piggyback float) and 92572 (1/2 HP fiberglass-reinforced thermoplastic, vertical piggyback float), plus siblings in the same owner's manuals: 92251/92255/92257/92260, 92330/92331/92335/92337/92342, 92351/92352, 92501/92507/92511, 92270/92272, 92370/92372, 92570. Last digit and switch vary by SKU; read the label on the pump body and the switch tag. Search terms: Superior Pump 92341, 92572 sump pump, Superior pump won't turn on, Superior vertical float switch replacement, Superior Pump piggyback switch.

Single sourceBrands: Superior Pump6 components

Simple oil-cooled submersible pumps with a separate float switch that has a piggyback plug: the switch plugs into the wall and the pump plugs into the back of the switch. That makes field testing easy, since the pump can be plugged straight into the outlet to check the motor apart from the switch. Construction is either thermoplastic or cast iron with a PSC motor and an automatic-reset thermal overload. Most failures are switch, check valve and discharge problems, not the motor.

Safety first

Unplug before touching the pump, float or pit water. Use a grounded GFCI outlet; never remove the ground prong.
Superior allows only a grounded waterproof extension cord no lighter than 14/3 and no longer than 25 ft when one cannot be avoided; a direct outlet is better.
Do not lift the pump by the cord or discharge hose.
Not for sewage, chemicals, flammable or corrosive liquids, or liquids over 120 F.
A qualified electrician should do any outlet or circuit wiring.

How it works

The float switch closes the circuit through its piggyback plug when the water raises it, and the pump runs until the float drops. Superior lists these levels: 92250 tethered float on about 9 in., off about 4 in.; 92341 vertical float on about 6 in., off about 2 in.; 92572 vertical float on about 6.5 in., off about 2 in. (all single source). On vertical switches only the off point can be adjusted.

The motor is oil-cooled and thermally protected. If it overheats (dry running, hot water, jammed impeller) the overload opens and resets by itself once it cools. Superior warns that the overload is a safety device and will eventually fail after repeated trips.

Flow falls with height. Superior's chart (GPM at 0 / 10 / 25 ft): 92250 family 30 / 20 / 2; 92341 family 46 / 30 / 1; 92572 family 55 / 42 / 16. At 25 ft the smaller pumps barely move water.

Superior recommends a full-flow swing check valve the same size as the discharge, as close to the pump as possible, and Schedule 40 PVC rather than corrugated hose for a permanent install.

Components & tests

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OnCall Tech is a reference tool for trained technicians and can make mistakes. Always disconnect power and confirm with the manufacturer's documentation before you work. © 2026 OnCall Tech. Original content; not a reproduction of any manufacturer document.Generic part photos (not of this brand): Smooth glass electric cooktop built into a wooden counter by Max Vakhtbovych, Pexels License

Diagnostic guides for this appliance

Guide · Sump / Well Pump

Sump pump service: pour test, float, check valve, discharge, pit cleaning and backup

Zoeller's instructions for common submersible sump pumps call for clearing debris from the basin and testing the system at least every three months; service companies agree on a quarterly pour test, a twice-yearly check of the check valve and discharge, an annual pit cleaning and a 2-3 year battery change on backups. The core test is simple: add water, watch the float lift, the pump start, the water leave and the pump stop.

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A bladder or diaphragm well tank holds an air charge that should sit about 2 psi below the pressure switch cut-in (for example 28 psi on a 30/50 switch, 38 psi on a 40/60). The charge can only be read with the pump off and the system drained to zero water pressure. A yearly check catches a slowly leaking charge before it short-cycles the pump. Water from the air valve means a failed bladder.

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Water in the basement but the sump pit is dry

If the pit stays dry while the floor gets wet, the water is not reaching the drain system that feeds the pit; the pump is not the problem. Usual causes are surface water (grading that slopes toward the house, short or clogged downspouts, overflowing gutters), a pump discharge that dumps next to the foundation, or a basement with no perimeter drain tile tied to the pit. Also rule out condensation and plumbing leaks.

6 steps ~45 mineasy

Other sump & well pumps manuals

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Liberty Pumps 230 and 450 series aluminum submersible sump pumps (237, 231, 233, 457, 451, 453): quick sheet

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Zoeller M53 Mighty-Mate and M98 Flow-Mate sump pumps: quick sheet

Zoeller cast-iron submersible sump pumps with the integral float in a switch case: M53 (3/10 HP) and M98 (1/2 HP), 115 V automatic versions; the same switch case family appears on M57/M63/D-series and some N (effluent) variants. Cord length and LED plug vary by SKU.

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