5-3: Water and Chemical System
CHEMICAL SYSTEM TROUBLESHOOTING
1.0. System will not prime
POSSIBLE CAUSE SOLUTION
1.1. Check valves in
chemical pump are faulty.
Remove valves and inspect. Clean or replace as
necessary.
1.2. Chemical pump
diaphragm is faulty.
Remove and inspect. Replace as necessary.
1.3. Check valve in high
pressure pump (the one that
the chemical pump attaches
to) is faulty.
Remove valve and inspect. Clean or replace as
necessary.
1.4. Filter on feed line in
chemical jug is clogged.
Inspect and clean.
1.5. Feed line from chemical
jug is loose, pinched or cut.
Inspect and repair.
1.6. Three-way prime valve
is faulty.
Check valve for leaks between ports. Replace as
necessary.
If the chemical system has been run dry, it may be necessary to prime the chemical
system to purge all of the air from the system.
2.0. Chemical ow is unstable or low
POSSIBLE CAUSE SOLUTION
2.1. Air in lines. Check that all ttings and connections are tight and in
good condition. Repair or replace as necessary.
2.2. Filter screen in
chemical jug is partially
clogged.
Inspect and clean.
2.3. Three-way chemical
valve is faulty.
Inspect valve for leaks between ports. Replace as
necessary.
2.4. Chemical metering
valve is faulty or partially
obstructed.
Inspect valve and clean or replace as necessary.
2.5. High pressure check
valve is faulty.
Remove and inspect. Clean or replace as necessary.
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