Jebao WiFi 4 channel doser and air gaps

[plankton]

I test alk once per week, thank god, and noticed even though I was adjusting up the amount I’d dose alk wasn’t increasing in proportion. I noticed air gaps would purge then find gaps again next morning. Replaced lines, lowered doser and still air gaps. I just added check valves and will see if that makes any difference.

Any tips or tricks I’m missing to ensure no leaks or air gaps with unit?

TIA!

S

 

[Redfoxtang]

Any chance maybe the actual head has a slight tear in the hose. Have you tried switching the actual dosing head?

 

[plankton]

Any chance maybe the actual head has a slight tear in the hose. Have you tried switching the actual dosing head?

I still have the spare and will try that. Thx

 

[Ratherbeflyen]

Pretty good chance that if you keep getting air bubbles you have a leak somewhere. It's not very hard or expensive to change the tube in the dosing head.

Most of the dosing pumps, including the jebao use a roller directly on the motor shaft. Mine started to rust and would slip making the dosing quantity impossible to set. A good upgrade was to replace the dosing heads with ones that had positive gearing instead of friction.

I got mine on ebay. Most are 6v and the dosing system is 12v. I just used a resistor, but you could also locate 12v pumps.

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