Air in Hydro Lines

[Noob]

Good morning guys, I was hoping for some help. I have the hydrminder 5111's that supposedly have a vacuum break built in. My problem is that after chemicals are mixed and the hydrominder kicks off I had air back flowing into my chemical lines. The air causes huge gaps in my chem lines which results in a very unpredictable chemical mixture. I have attach a video below. You can see the air bubbles flowing back into the line. I have also checked the foot valves and they appear to be good. The lines stay full and they feel solid. Any suggestions to keep the air from back flowing into the lines?

[video=youtube_share;yO17b8dc0Fs]https://youtu.be/yO17b8dc0Fs[/video]

 

[Earl Weiss]

Have you checked the foot valves? They should prevent any reverse flow if working properly . Also why does the line go upward? If it only went down any air would stay at the top.

 

[Noob]

Earl for whatever reason this is the way the lines were origanlly ran. They are pulling chemicals from the floor and the installer zip tied them to the water line that feeds the minder. I will fix them today so that the high point is the injection point. I think my foot valves are good but I will recheck. Is it normal for the chem lines to gather air? I’ve never taken apart a hydrominder. Could I have some seals that are bad? It’s weird because the chemicals stay in the line. I’ll have chemicals in the line then an air gap then chemical all the way down to the chem tank.

 

[OurTown]

Most of ours seem to have air in them but they still work okay. I think the ones that don't have air are not coming in higher than the inlet.

 

[Earl Weiss]

If the foot valve is OK, and the line only goes down from the injector, air will not want to go down from the injector.
Report back.

Just a thought. Is this a "Siphon breaker" model of hydro minder?

 

[Noob]

I will fix the chem line tonight. The hydrominder do have a built in siphon break.

 

[MEP001]

There should be no air entering the tube regardless of the tube being higher or there being a siphon breaker. It's possible the tube is collapsing a little as chemical draws and it allows a bit of air into it when the valve shuts off, but it should get to a point and stop. If it continues to draw air until it's down to the bucket, either the foot valve is bad or it isn't sealing in the tube.

 

[Earl Weiss]

There should be no air entering the tube regardless of the tube being higher or there being a siphon breaker.

I agree there shouldn't be but my thought was the siphon breaker allows air to enter an otherwise closed system

 

[MEP001]

The siphon breaker is to prevent the Hydrominder from siphoning from the chemical bucket or the mixed tank back into the fresh water lines. It does drain the line forward of the breaker so it will also prevent the diluted chemical from drawing back into the pail if the foot valve is bad.

 

[OurTown]

Our dual chemical kit gets bubbles in the lines. I replaced both lines the other day with 1/4" ID Excelon tubing and new foot valves and it still does it. It titrates fine but it drives me nuts seeing the air in the lines.

https://www.kleen-ritecorp.com/p-39346-e-gap-dual-port-35gpm-kit.aspx

 

[Ontario Car Wash]

Drove myself crazy with that today my inlet tube is higher maybe four inch hose goes over top the tub instead of through it and all day I watched a little bubble come out of the tip. Which would then leave an air gap wear curved over the top the tank then would take a second for the product to actually get to the tips till the air bubble sucked up I'm back to the bubble coming out of the tip again.
But it's only on my brush
All the rest of plum the same
Do you have to buy that hose from a car wash store I went to home Depot to buy some hosefor the feed line but I can't seem to find the same home depot's is a lot thinner wall.I feel this one's doing it because of the home Depot hose all the rest of them have a kleen rite feed line. But why is it come out of the tip I do understand that coming out of the side of the wall???

 

[Ontario Car Wash]

Brought the hose in from the hole in side of tank.
The hose is now level then down to barrel and no more bubble
it does send a few bubbles out of the tip still for a second then stops and bubble is the size of a dime were before it was pretty big since it had to climb over the tank/
only took me 20 years to change it........