Maintenance - Cleaning Stenner Injector

The Stenner chemical pump is pumping chemicals but the readings are not balancing.
The Stenner pump is running for longer periods of time.

Turn off chemical controllers
Isolate injector by closing isolation valves in pipe. Or if the injector is not able to be isolated, turn off pool pump.
If pressurized- depressurize system and bleed pressure from pump discharge tubing.
Loosen and remove connecting nut and ferrule from the injector. If you have an injector check valve (duckbill) that is where you will remove tubing from.
Replace duckbill (if applicable)
Leave injector in pipe and insert a phillips screwdriver through injection fitting to break up accumulated deposits.
If screwdriver does not fit through the injector due to too much buildup, remove injector from pipe and soak in a diluted acid solution.
Once injector is clean, reinstall discharge tubing (change is needed), and ferrule (replace if needed) into injector.
Tighten the connection nut finger tight
Return flow to pool by opening the isolation valve or turning back on power.
Check for no leaks and turn back on chemical controllers.

Make sure tubing is at least ¾”-1” into injector.
Replace any tubing, injector or ferrule if cracked, leaking, broken, or deteriorated.
If using a check valve (duckbill) make sure to reinstall the check valve into injector before reinstalling the tubing.
Make sure to always use caution when disconnecting discharge tubing. Discharge may be under pressure and the chemical will spew out when disconnected.
If you are experiencing clogs on a regular basis. You can cut the injector steam on a 45 degree angle on the flow side. Also ensure that the pump doesn't run without chemicals as air in the lines cause the chemicals to solidify.
If tubing has buildup or clogged on the end, make sure to cut or replace.

Cleaning Stenner Injectors need to be cleaned at least once a month to keep any buildup from clogging the injector.