Hydropump DH900 Battery Backup Sump Pump, with Do-It-Yourself Installation

For other battery-backup pumps we sell, see our battery backup sump pump category page.

Quick Summary

• High-performance battery back-up sump pump
• Easy, do-it-yourself installation.
• Average pumping rate: 900 gallons/hour, at 9 feet of lift
• Corrosion resistant components
• Advanced finish-charger protects battery
• Water alarm alerts you to high water conditions
• Free Shipping to the continental USA

Unique Features

• Easy to install. Stainless steel mounting bracket makes it easy to position the pump. All connections are made above the floor. No re-working of main sump pump piping. Usually takes about an hour.
• Durable construction – The DH900 is made from high grade components. Each unit is hand-assembled and hand-tested in the USA.
• Better charger - High quality finish charger protects you from ending up with an overcharged, dead battery.
• Pump stays dry - Hangs on its bracket above the normal water line, extending its life.
• Check valve protected - Many back-up pumps' check valves are placed close to the primary pump's exit. The high water turbulence at this point can damage the check valve, potentially causing a basement flood. The DH900 avoids this problem by connecting to the discharge pipe 3 to 4 feet above the main pump's exit. This allows you to install the check valve at a safe point where water is running smoothly through the pipe, preventing damage to the check valve.

Pump Capacity

• Pumping rates: 900 GPH at 9' of lift, 1300 GPH at 5' of lift
• Provides 12 hours of pumping time if pump cycles every minute, 48 hours of pumping time if pump cycles every 5 minutes, and 96 hours of pumping time if pump cycles every 15 minutes
• Each pump cycle above represents 30 seconds of pumping time
• Pumping time can be doubled by adding capacity for a second battery with optional Dual Battery Case.

Installation

• Stainless steel mounting bracket included, making installation simple and easy. Usually takes about an hour.
• Everything needed for installation is included, except the battery and a few basic supplies (see Hydropump installation instructions and necessary installation tools below)
• Hydropump is independent of your main sump pump, which means you do not have to rework the main pump or pipework

Operation

• Heavy duty, efficient motor allows for long life and running time
• Water alarm sounds when backup pump is operating, alerting you to high water conditions

Battery

• High-impact plastic battery case protects the battery and terminals, while allowing plenty of ventilation.
• Double your pumping time by adding capacity for a second battery with optional Dual Battery Case
• Note: Battery NOT included, due to shipping weight. Recommend buying a 12 volt battery at a hardware or automotive store. Any of the following types work: Marine Deep Cycle, Sealed Lead-Acid, Gel Type or AGM. Use case size 27. More information on sump pump batteries.

Charger

• High quality finish charger included. Can charge 2 batteries, if using optional Dual Battery Case
• Battery status light indicates whether battery is good or needs replacement.
• Advanced finish-charger safeguards the battery from overcharging, a common cause of dead batteries.

Technical Information

• Motor: 1/16 HP, 12V-DC, 10 AMP
• Charger: 1 AMP Hour @ 12V-DC
• Service: 120 VAC, 60 Hz, GFCI Outlet
• Pump Size: 7" length, 6" diameter
• Pump Weight: 7 Lbs.
• Shipping Weight: 15 Lbs.
• Can be used with a sealed radon cover

Items Included:

• DH900 Battery Backup Sump Pump
• Charger: High performance finish charger
• Float Switch: Tether type with clamp and heavy duty cord
• Battery Case: High impact plastic (battery not included)
• Stainless steel mounting bracket
• Water alarm
• Hardware: hose clamps, 1" flexible hose, PVC tee / check valve
• Instructions
• 2 year manufacturer's limited warranty

Installation Steps

• Position pump using floor bracket.
• Set up discharge (3 options): 1) Outdoor Discharge - Pipe discharge hose directly to the outdoors, 2) Indoor Discharge - Install the tee into main sump pump discharge line, 3) Emergency Discharge - Connect hose into a laundry tub or floor drain.
• Mount the float switch.
• Insert battery into box and connect terminals.
• See also Hydropump installation instructions (follow link above).

Additional Parts, Tools, and Supplies Needed for Installation

• Check Valve for Primary Pump (homeowners often have this already)
• Hand Saw and/or PVC cutting tool
• Phillips and Slotted Screwdrivers
• Utility Knife
• Tape measure
• Large adjustable pliers
• PVC cement

Shipping Information

• Shipping weight: 15 lbs.
• Free standard ground shipping to the continental USA.
• Canadian customers: We must process your orders over the phone. To place an order, call us at 800-318-4159. Ground shipping to Canada is $51 (includes customs duty).
• Call us for quotes to Alaska and Hawaii, or for Second Day or Next Day Air Shipping quotes.

What is "lift?"

• "Lift" is the height the sump water must be pumped before leaving the house.
• A typical basement is 7 feet tall, plus 2 feet into the sump pit, for a total of 9 feet of lift. Higher lift distance makes the pump work harder, thereby reducing its pumping rate.

Note: All prices in USD

Read our article to learn how to determine what sump pump size you need.

Other battery backup sump pumps we offer: the space-saving Hydropump RH1400, the 1800 GPH Hydropump DH1800, as well as the high volume (3000 GPH) Hydropump PH3000.