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Liberty CSP-237 crawl space sump pump system in polyethylene basin with aluminum pump body

Liberty

Liberty CSP-237 Crawl Space Trap 1/3 HP 115V

SKU CH-WDSZ-D2Z3B MPN CSP-237

A 1/3 HP, 115 V crawl-space sump system with a polyethylene basin and vertical-float switch, delivering up to 48.0 gpm at 20 ft head and 38.0 gpm at 5 ft head

  • Product typeDrain Components
  • 1/3 HP motor delivers reliable crawl-space drainage
  • 0 gpm at 5 ft head handles heavy inflow
  • 0 ft maximum head clears deep basins
  • Vertical float switch automates pump operation
  • 2 gal polyethylene basin resists corrosion

Crawl-Space Sump System

The Liberty CSP-237 is a complete sump pump system built for crawl-space drainage. It combines a 1/3 HP pump with an integrated polyethylene basin and a vertical float switch. The unit operates on 115 V AC at 60 Hz and is ready for installation in residential settings.

Homeowners with Crawl Spaces

This system suits owners who need automatic water removal from a confined crawl-space area. The compact 15-inch diameter basin fits tight access points while the vertical float ensures reliable actuation. Buyers needing higher flow rates or a deeper basin for heavy groundwater intrusion should look at larger-capacity alternatives.

1/3 HP Motor and 21-Foot Head

The 1/3 horsepower motor delivers a maximum shut-off head of 21.0 feet, which determines whether the pump can lift water to the discharge point. At 5 feet of head the flow reaches 38.0 gpm, dropping to 18.0 gpm at 10 feet and 20.0 gpm at 15 feet. Verify your vertical lift requirement against the 21.0-foot limit before purchase.

How it compares

Measured against everything we stock in Drain Stoppers, Strainers & Traps, at today’s prices. Recalculated every night.

Price $278.99
Pricier than about 89% of the 4,240 comparable items (median $31.99).

Specifications

Product
Brand nameLiberty
Model nameCSP-237
Product typeDrain Components

Questions about this item

What electrical supply must already be available for the 115 V pump to operate?

The system requires a 115 V AC, 60 Hz single-phase circuit with a grounded outlet; the integral float-switch cord plugs directly into that receptacle.

Will the 15-inch polyethylene basin fit alongside an existing 15-inch sump pit without modification?

The basin is 15 inches in diameter and 15 inches tall, so it occupies the same footprint as a standard 15-inch pit and can sit beside it if floor space allows.

How can I verify the pump is delivering its rated 38.0 gpm at 5 ft of head after installation?

Time how long it takes to fill a 5-gallon bucket from the discharge; at 38.0 gpm the bucket should fill in roughly 8 seconds when the head is near 5 ft.

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