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Piping for Effluent Applications - 3/4" (19 mm) or less solids
ABS, PVC and galvanized steel are suitable piping materials. Check local building codes before making a selection. Piping must be 1½"
(32 mm) minimum to carry volume of pipe discharge. If a threaded discharge is required, secure adapter to volute with ABS cement. If a
threaded discharge is not necessary, cement pipe directly to volute.
Piping for Sewage Applications - 2" (51 mm) or less solids (DSBW300)
ABS, PVC and galvanized steel are all suitable piping materials. Check local
building codes before making a selection. Piping must be 2" (51 mm) minimum to
keep any solids present in suspension in the fluid. If a threaded discharge is
required, secure adapter to volute with ABS cement. If a threaded discharge is
not necessary, cement pipe directly to volute.
Check Valves & Air Locking
Check local codes to determine if a check valve is required in your system. If
using as a wastewater pump, a check valve is recommended.
Air locking may occur if the sump empties after extended periods of dry weather.
When wet weather returns and the sump begins to refill, air may become trapped
below the discharge check valve. Drill a 1/8" (3 mm) diameter relief hole in the
discharge pipe below the check valve. This hole will help prevent “air locking”
where a check valve is used. The frilled hole will vent air trapped in the system.
Frequent operation of the pump prevents air locking from occurring.
For best performance of the check valve when handling solids, install in a
horizontal position to keep solids from settling in the valve preventing it from
opening and closing.
Basin Cover and Vent
A sealed cover and vent are compulsory in sewage applications but not where
only sump water is to be pumped. However, a cover will prevent foreign solid
matter from falling into the sump basin and possibly damaging the pump. It may
also prevent personal injury.
Electrical Information
WARNING: Risk of electrical shock - this pump is supplied with a grounding type attachment plug. To reduce the risk of
electrical shock, be certain that it is connected only to a properly grounded type receptacle.
The pump operates on a 115 volt, 60 cycle AC, single phase and has three-prong electric plug. The third prong is used to ground the
pump to prevent possible fatal shocks. The third prong must not be removed. The fuse or circuit breaker used should be a 15 amp time-
delay type.
Automatic Thermal Overload Protection
The motor has a built-in automatic overload protector. It will cut off the power to the motor before the temperature rises enough to
damage the motor windings. Should the overload stop the pump operation, it will reset automatically. Operation will resume when the
motor cools enough to close the overload switch.
Liquid Level Control Operation
A float switch is used for automatic operation to turn pump on and off.
Adjust liquid level control to suit the following conditions:
1. Pump should not operate for extended periods of time while motor housing is in air. Otherwise thermal protection will shut motor off.
2. Pump must not operate for any length of time while impeller is out of water. Position the float so that it cannot “hang up” on the sides
of the basin or on the pump itself.
Adjustments are made by decreasing or increasing the float tether to a minimum 4" (102 mm) tether length and a maximum 6" (152 mm)
tether length when the float is secured to the pump.
Securing the float to the discharge pipe should be done with a cable tie or waterproof tape.
Figure 1 - Prefabricated Basins
Check valve 45°
Vent
Inlet
Gasket
Basin
1/2"
Minimum
Clearance
3. Optional Alarm. Sump pumps can burn out, lose power, become
clogged or misaligned, or malfunction in a variety of other ways. It is
valuable to have a warning device installed that will signal water build-up.
