Low pre-soak pressure issue

[spf8298]

I'm having an issue with low pre-soak pressure on my inbay automatic. We have an old design automatic that is an inverted 'L' similar to a rain maker. Our presoak is fed to the automatic and 3 self serve bays through one common booster pump. There are solenoid valves that control the flow of the presoak to the IBA and 3 self serve bays.

I have no pressure issues with the self serve bay presoak function, only in the inbay automatic presoak. I'm having trouble trying to track the issue down. I do inject air into the IBA presoak, and I've played with that adjustment, but the presoak liquip pressure still seems weak and has a low stream. could a faulty check valve impede the flow of presoak to the IBA? I'm going to look at that next. I also have a pressure regulator that controls all the liquid pressure to the presoak booster pump, but I wouldn't think that would be faulty since I still have good pressure to the self serve bays.

Anyone else got any suggestions on what I should look at? I hope I'm making sense.

Shaun

 

[edredtop]

I'm having an issue with low pre-soak pressure on my inbay automatic. We have an old design automatic that is an inverted 'L' similar to a rain maker. Our presoak is fed to the automatic and 3 self serve bays through one common booster pump. There are solenoid valves that control the flow of the presoak to the IBA and 3 self serve bays.

I have no pressure issues with the self serve bay presoak function, only in the inbay automatic presoak. I'm having trouble trying to track the issue down. I do inject air into the IBA presoak, and I've played with that adjustment, but the presoak liquip pressure still seems weak and has a low stream. could a faulty check valve impede the flow of presoak to the IBA? I'm going to look at that next. I also have a pressure regulator that controls all the liquid pressure to the presoak booster pump, but I wouldn't think that would be faulty since I still have good pressure to the self serve bays.

Anyone else got any suggestions on what I should look at? I hope I'm making sense.

Shaun

Don't own an automatic but....
Many times over the last 20 years I've found the air randomly finds a way to dry the soap in-line (after its blended) and create a blockage. If you use an old style mixing block where the air and product come together I would start there, then check downstream.
If you can, try opening both ends of the line and force HP water through.
If you inject air before the check, I would think it can foul it too.

 

[Greg Pack]

Check any check valves and solenoids. Diaphragm solenoids over time can go bad and restrict flow. Check for any old low pressure lines that might have kinked in a hidden spot. Check any foam generators for excessive buildup.

side note- my self serve presoak is way weaker than my IBA presoak. I can't imagine a setup where they both use the same product at the same strength as optimal.