S Series FW 3.02.02
www.stenner.com
98
CLEANING THE POINT OF INJECTION
continued
1.
Turn metering pump off and unplug cord. Disable any water pump or auxiliary equipment's electrical supply.
2.
Depressurize system and bleed pressure from pump discharge line.
3.
Loosen and remove the 3/8" or 1/4" nut & ferrule from the check valve or injection fitting to disconnect discharge line.
Duckbill Check Valve or Ball Check Valve
•
Unscrew the top fitting (check valve body) to disassemble. The bottom fitting (injection fitting with arrow)
should remain attached to the pipe.
•
Remove duckbill or remove ball check components from check valve body. Inspect and replace parts as
needed. If using a ball check valve be careful not to stretch or damage the spring.
4.
Insert a #2 Phillips head screwdriver through injection fitting into the pipe to locate or break up accumulated
deposits. If screwdriver cannot be inserted, drill the deposit out of the injection fitting. DO NOT drill through the
opposite pipe wall.
5.
Replace discharge line if cracked or deteriorated. If the end is clogged, cut off the calcified or blocked section of
discharge line.
Injection Fitting (S30 - 25 psi max.)
Replace ferrule and reinstall the discharge line to the injection fitting approximately 3/4"-1" until it stops.
Duckbill Check Valve or Ball Check Valve
•
Reassemble the check valve.
•
Replace ferrule and reinstall the discharge line to the injection check valve approximately 3/4" until it stops.
6.
Tighten the connecting nut finger tight while firmly holding the tube fitting. The 3/8" nut may be wrench tightened
one additional half turn. If leak occurs, gradually tighten the 3/8" nut as required.
7.
Enable the water pump electrical supply and pressurize the water system.
NOTE: The roller assembly must be expanded so the tube is pressed against the tube housing wall.
8.
Put the metering pump back in service and inspect all connections for leaks.
Clean out accumulated deposits with a
#2 Phillips head screwdriver.
Periodic inspection and cleaning of the
point of injection will maintain proper pump
operation and provide maximum tube life.
Cut off the calcified or blocked section.
