why?

Jim Pemberton

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I don't run chems through my chem meter/machine. So I would think the diaphragm would last longer.

The opposite:

The diaphragm is getting hit with pressure from the water pump to move the chemical through. When the other side is "dry", it is forced to flex further and is more rapidly damaged. Prime in straight water to put water onto the opposite side of the diaphragm, but keep the meter off.

Or remove the entire chemical pump and you won't have to deal with the issue at all.

You probably also have a bad chemical check valve, which would be why your having water come out the hose.
 

Papa John

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It sounds like you need a new diaphragm.

But what do I know?
Hole in diaphragm or bad check valves
The opposite:

The diaphragm is getting hit with pressure from the water pump to move the chemical through. When the other side is "dry", it is forced to flex further and is more rapidly damaged. Prime in straight water to put water onto the opposite side of the diaphragm, but keep the meter off.

Or remove the entire chemical pump and you won't have to deal with the issue at all.

You probably also have a bad chemical check valve, which would be why your having water come out the hose.
The new diaphragm looks different and is smooth with less impressions on it. Jon Don said they sent the correct one for my machine. Are the impression there because it's old or happen once installed?
 
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Jim Pemberton

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The new one should be smooth.

The impressions are damage from the pulsations against the air in the “dry” side of your diaphragm.

Is there a deep impression around the edge of your diaphragm?

Post a pic, or send it to me by DM if you don’t like being roundly criticized by the insensitive and gleefully critical crowd here
 

Papa John

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photos

17286655008033326284873037284626.jpg 17286655312562343020246264653976.jpg
 

Papa John

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I think you'll find the problem to be solved...though you still might have a stuck check valve as well.
Thanks for your help. problem solved.

I still need to figure why my transfer pump keeps Crapping out. It offers a higher flow than the previous one. maybe it's too strong?
 

Jim Pemberton

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Happy to help....it is what I do at my store nearly every day.

What are the specs on your pump. Do you have an expansion tank with your pump?
 

Papa John

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Happy to help....it is what I do at my store nearly every day.

What are the specs on your pump. Do you have an expansion tank with your pump?
I did have an expansion tank but disconnected it when I thought it might be causing the problem. I posted a photo in another post. The tank is installed above the pump instead of on the floor and horizontally.-- does its orientation matter?

You need to move to Alabama
One of the few states I've never been to.
I have fond memories of Montana and Colorado. Mikey has even made Nevada look desirable.
However, I can get the same feeling of red (purple) states in California.
 

Jim Pemberton

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I did have an expansion tank but disconnected it when I thought it might be causing the problem. I posted a photo in another post. The tank is installed above the pump instead of on the floor and horizontally.-- does its orientation matter?


One of the few states I've never been to.
I have fond memories of Montana and Colorado. Mikey has even made Nevada look desirable.
However, I can get the same feeling of red (purple) states in California.

I don’t believe the orientation is the issue.

Consider putting it back John
 
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