1.
Empty pump/strainer housing.
Solution: Make sure pump/strainer housing is filled with water and cover O-ring is clean. Ensure O-ring is
properly seated in the cover O-ring groove. Ensure O-ring is lubricated and that strainer cover is locked firmly in
position.
Lubricant will help to create a tighter seal.
2.
Loose connections on suction side.
Solution: Tighten pipe/union connections.
NOTE - Any self-priming pump will not prime if there are suction air leaks. Leaks will result in bubbles emanating
from return fittings on pool wall.
3.
Leaking O-ring or packing glands on valves.
Solution: Tighten, repair, or replace valves.
4.
Strainer basket or skimmer basket loaded with debris.
Solution: Remove strainer housing cover or skimmer cover, clean basket, and refill strainer housing with water.
Tighten cover.
5.
Suction side clogged.
Solution: Contact a qualified repair professional.
a.
If pump develops a vacuum, check for blocked suction line or dirty strainer basket. An air leak in the suction
piping may be the cause.
b.
If pump does not develop a vacuum and pump has sufficient “priming water”:
- Re-check strainer housing cover and all threaded connections for suction leaks. Check if all system hose clamps
are tight.
- Check voltage to ensure that the motor is rotating at full RPM’s.
- Open housing cover and check for clogging or obstruction in suction.
- Check impeller for debris.
- Remove and replace shaft seal only if it is leaking.
6．Make sure all suction and discharge valves are open and unobstructed, and that pool water level is above all
suction openings.
E.
Low Flow – Generally, Check For:
1.
Clogged or restricted strainer or suction line.
Solution: Contact a qualified repair professional.
2.
Undersized pool piping.
Solution: Correct piping size.
3.
Plugged or restricted discharge line of filter, valve partially closed (high gauge reading).
Solution: Sand filters – backwash as per manufacturer’s instructions; D.E. filters – backwash as per manufacturer’s
instructions; Cartridge filters – clean or replace cartridge.
4.
Air leak in suction (bubbles issuing from return fittings).
Solution: Re-tighten suction and discharge connections using Teflon tape. Inspect other plumbing connections and
tighten as required.
5.
Plugged, restricted, or damaged impeller.
Solution: Replace including new seal assembly.
F.
Noisy Pump – Check For:
1.
Air leak in suction piping, cavitation caused by restricted or undersized suction line or leak at any joint, low water
level in pool, and unrestricted discharge return lines.
Solution: Correct suction condition or throttle return lines, if practical. Holding hand over return fitting will
sometimes prove this point or putting in a smaller eyeball fitting.
2.
Vibration due to improper mounting, etc.
Solution: Mount the pump on a level surface and secure the pump to the equipment pad.
3.
Foreign matter in pump housing. Loose stones/debris hitting impeller could be cause.
Solution: Clean the pump housing.
4.
Motor bearings noisy from normal wear, rust, overheating, or concentration of chemicals causing seal damage which
will allow chlorinated water to seep into bearings wiping out the grease causing bearing to whine.
Solution: All seal leaks should be replaced at once.
CHAPTER Eight: Technical data
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