MODELS 2P121 THRU 2P128 & WP373 THRU 2P380
WARNING: SUPPORT PUMP AND PIPING WHEN ASSEMBLING AND WHEN INSTALLED. FAILURE TO DO SO MAY CAUSE PIPING TO
BREAK, PUMP TO FAIL, MOTOR BEARING FAILURES, ETC. ALL OF WHICH CAN RESULT IN PROPERTY DAMAGE AND/OR
NOTE: If plastic or fabric hose is used for the suction piping, it should be of a reinforced type so as not to collapse under suction.
The suction piping should be the same size or one size larger than the discharge piping.
It is recommended that a foot-valve be used on the suction line to assure quick priming and that a suitable
suction strainer be attached to the suction line so that large pieces of foreign material are not drawn into the
NOTE: A foot-valve is required when the suction lift is over 10 feet or when long suction line runs are involved. The maximum
opening in the suction strainer should be 1/4".
Inspect impeller for proper rotation. When viewing the pump end, the motor should rotate
CAUTION: Clockwise rotation when facing pump inlet will destroy motor. Incorrect wiring is not covered under limited warranty.
Make necessary wiring connection for the voltage outlet supply, using a wire of adequate size to minimize
voltage drop at the motor. DOUBLE CHECK ALL CONNECTIONS. (Refer to wiring diagram on motor
nameplate or the inside cover of the connection box in the motor end bell.)
WARNING: NEVER CONNECT THE GREEN (OR GREEN AND YELLOW) WIRE TO A LIVE TERMINAL!
A ground wire (Ref. No. 25) is included with each unit. One end has been attached to the pump. Attach
the loose end to an acceptable ground, as determined by a qualified electrician or as required by codes
WARNING: EACH APPLICATION SHOULD BE REVIEWED FOR COMPLIANCE WITH LOCAL CODES, FIRE DEPARTMENTS,
INSURANCE COMPANIES, NATIONAL ELECTRICAL CODE (NEC), ETC. FOR PROPER GROUNDING OF STATIC ELECTRICITY.
CAUTION: Always wire the motor with a three wire system, insuring that a ground wire runs to a good electrical ground such as a
grounded water system or conduit. Also, insure that a good electrical ground is provided at the supply end of the line. Connections
should be made with flexible conduit to minimize vibration transmission.
Install auxiliary components (e.g. - pressure switch, timer, etc.).
It is necessary to prime the pump casing before initially starting the pump. The quickest and easiest
method is to remove the pipe plug from the tee in the discharge and fill the casing with liquid (it holds about
a quart). If the tee was not installed in the discharge, the casing can be primed by removing the discharge
NOTE: This pump is designed so that it should make it unnecessary to continually reprime. When the pump is shut down, enough
liquid normally remains in the casing so that it will not have to be reprimed.
CAUTION: Do not run pump dry as permanent damage to the mechanical seal will result.
Activate the unit.
NOTE: It may take up to five minutes for unit to prime once casing has been filled with liquid. In runs over 10 ft. horizontally or
vertically a foot-valve must be used and unit totally primed including the inlet (suction) piping and the casing.
CAUTION: The proper impeller (motor) rotation is CCW facing the front of the pump. Wrong rotation will give low performance, low
head and could damage unit and/or injure personnel. Maintenance
WARNING: MAKE CERTAIN THAT THE POWER SOURCE IS DISCONNECTED BEFORE ATTEMPTING TO SERVICE OR
DISASSEMBLE ANY COMPONENTS! IF THE POWER DISCONNECT IS OUT OF-SIGHT, LOCK IT IN THE OPEN POSITION AND TAG TO
PREVENT APPLICATION OF POWER.
Pump should be checked daily, weekly, monthly, etc. for proper operation. If anything has changed since unit
was new, unit should be removed and repaired or replaced. Only qualified electricians or servicemen should
attempt to repair this unit. Improper repair and/or assembly can cause an electrical shock hazard.
Should the pump require servicing, refer to the Replacement Parts Illustration (Figure 9) as an aid in
disassembly and reassembly procedures. Replace all worn or damaged parts.
If the pump is located in an area subject to freezing temperatures, the pump should be drained when not in
operation. ALSO, THE PUMP SHOULD BE FLUSHED AFTER EACH USE, IF USED WITH GUMMY
SUBSTANCES OR SIMILAR FLUIDS.
MECHANICAL SEAL REPLACEMENT
Should the mechanical seal, which consists of seal cartridge (Ref. No. 11) and seal seat (Ref. No. 12) require
replacement, proceed as follows and refer to Figures 7, 8, and 9.
IMPORTANT: ALWAYS REPLACE BOTH THE SEAL
SEAT AND THE SEAL CARTRIDGE TO INSURE PROPER MATING OF COMPONENTS! IT IS
RECOMMENDED THAT THE TEFLON IMPELLER O-RING (REF. NO. 15) ALSO BE REPLACED WHEN
REPLACING THE PUMP SEAL.
Unthread capscrews (Ref. No. 9) and remove casing (Ref. No. 17) and O-ring (Ref. No. 10).
Unscrew impeller locknut (Ref. No. 16) from the shaft adapter (Ref. No. 3) counterclockwise.
NOTE: Insert the long leg of a 3/16" hex key (Allen wrench) into the head recess of one of the socket head capscrews (Ref. No. 1) in
the shaft adapter clamp, and hold it against one of the adapter (Ref. No. 5) ribs to prevent the shaft from turning.