Trillium WSP-6, Installation, Operation & Maintenance Instructions Manual, Page: 38 / 73

WSP™
DATA SHEET WSP™ SELF-PRIMER PUMPS WSP-D300_6
Rev. 3 01/09/20
© 2019 The Factory
38
TROUBLESHOOTING WSP™ SELF-PRIMER PUMPS
PUMP FAILS TO PRIME
POSSIBLE CAUSE PROBABLE REMEDY
Low liquid level inside the pump casing. Add liquid to casing. See Section IV.
OPERATION, Part A.. PRIMING
Suction check valve malfunction. Clean or replace check valve.
Air leaking into suction line. Correct leak.
Internal lining of suction hose separation. Replace suction hose.
Leaking or worn seal or pump gasket. Check pump vacuum. Replace leaking or
worn seal or gasket.
Discharge head too high. Check piping installation and install
bypass line if needed. See Section III.
INSTALLATION.
Strainer plugged or blocked. Check strainer and clean if necessary.
PUMP STOPS OR FAILS TO DELIVER RATED FLOW OR PRESSURE
POSSIBLE CAUSE PROBABLE REMEDY
Air leaking into suction line. Correct leak.
Internal lining of suction hose separation. Replace suction hose.
Leaking or worn seal or pump gasket. Check pump vacuum. Replace leaking or
worn seal or gasket.
Strainer plugged or blocked. Check strainer and clean if necessary.
Suction intake vortexing. Check installation and correct
submergence as needed.
Impeller/wearplate worn or damaged. Replace worn or damaged parts. Check
that impeller is properly centered and
rotates freely.
Impeller plugged or blocked. Free impeller of debris.
Pump speed not running fast enough. Check driver output; check belts or
couplings for slippage.
Discharge pressure too high. Install bypass line.
Suction lift too high. Measure lift w/ vacuum gauge. Reduce
lift and/or friction losses in suction line.