Dehumidifiers with Pump

Dehumidifiers with Built-In Pump: Continuous Drainage for Sites Without a Floor Drain

A dehumidifier with a built-in condensate pump removes water automatically through a small drain tube — pushing condensate up to 20 feet vertically and 100 feet horizontally — so you don't manually empty the tank or rely on a gravity-fed drain that runs uphill. This is the right choice for water-damage restoration jobs in below-grade spaces, crawl space dehumidification with no floor drain at unit level, and any unattended commercial install where overnight operation matters. Pump-equipped units in this collection range from 95 to 350 pints per day across LGR refrigerant and standard refrigerant designs from XPOWER, Namco, Abatement Technologies, and Dapper Supply.

Pump vs Gravity Drain: When to Choose Each

When the Pump Is Worth It — and When It Isn't

Here's what we see constantly: contractors running a water damage job in a below-grade space with no floor drain accessible below the dehumidifier's outlet height. Without a pump, you're manually emptying tanks every few hours or rigging a gravity drain that runs uphill — neither works for an overnight drying cycle. The built-in condensate pump solves this. Models in this collection — the XPOWER XD-85L2, Namco P646, Abatement Technologies AT200C, and the Dapper Supply commercial series — push condensate 15–20 feet vertically and up to 100 feet horizontally through 3/8" or 1/2" drain tubing. The tradeoff: one additional maintenance point (the pump float) and a modest price premium over gravity-drain units. If you have a floor drain lower than the unit's outlet, gravity drain is simpler. If you don't, pump model.

Sizing for Water Damage, Crawl Space, and Basement Applications

Pump dehumidifiers in this collection range from 95 pints per day (Namco P646, right for crawl spaces and small basements up to 800 sq ft of affected area) to 350 pints per day (Dapper Supply DP-CD1131, built for large commercial losses). For IICRC S500 water damage restoration, the baseline is 1 unit per 800–1,200 sq ft of affected space, sized to your loss class. LGR units — the Abatement Technologies AT200C (190 PPD) and AT250RS (266 PPD) — are specified for Class 3 and 4 losses where low-grain refrigerant extraction is required and standard refrigerant units can't achieve the GPP levels post-remediation clearance demands. For unattended basement or crawl space installations where the job is ongoing moisture control rather than emergency drying, mid-range units in the 95–130 PPD range handle the load without over-sizing the system.

Related: LGR Dehumidifiers · Dehumidifiers for Water Damage · Dehumidifiers for Basements · Commercial Dehumidifiers · All Dehumidifiers

Drain Line Planning Before You Place the Unit

Built-in pumps provide 10–20 feet of vertical lift and 50–100 feet of horizontal run — more than enough for most installations, but measure the actual route before ordering. Map the drain path from unit location to discharge point (utility sink, floor drain at grade, or exterior wall penetration) including all vertical rise. Avoid 90-degree fittings where possible; each adds back-pressure that reduces effective pump distance. Secure the line at intervals so no low spots form — standing water in the line triggers false pump cycles and shortens pump life. For permanent crawl space or restoration trailer installations, route before mounting. All prices shown — no quote needed. Questions about sizing for a specific job? Call us.