low pressure pre-soak question

[shineanddrivevulcan@gmail]

I have a low pressure pre soak that takes 10-15 seconds before it makes it out the high pressure hose.

What PSI should I set the air and pre-soak to?

currently set to the following
65 psi pre-soak solution
35 psi air

Any help would be appreciated

 

[Eric H]

Are you trying to reduce the change over time or just make it look great?
The low pressure functions should be tee’d in just above the boom. More pressure will reduce the changeover times slightly but you can’t overcome the physics of having to displace the amount of chemical/water that the hoses hold.

 

[Earl Weiss]

I would reduce the air to 20 PSI or try even a little lower. Don't want the 2 items fighting each other.

 

[shineanddrivevulcan@gmail]

Are you trying to reduce the change over time or just make it look great?
The low pressure functions should be tee’d in just above the boom. More pressure will reduce the changeover times slightly but you can’t overcome the physics of having to displace the amount of chemical/water that the hoses hold.

I want it to look great but the change over time seems long.

do you mind if i ask what you run for psi for both ?

 

[shineanddrivevulcan@gmail]

I would reduce the air to 20 PSI or try even a little lower. Don't want the 2 items fighting each other.

20psi seems low but i will give it a shot. Im using 2506 tips currently and our setup fans nice but i would love more bubbles lol.

 

[shineanddrivevulcan@gmail]

Can someone please provide me with some feedback

I want the pre-soak to look great! does that mean I should bump up the PSI on the chemical feeder?

what about the air that pushes it?

Im using 2506 tips and it looks good but I want the wow factor.

 

[Greg Pack]

You'll get better performance if the poly product line going to the bay is 3/8", not 1/4"

To reduce changeover time, get the product manifold as close to the boom inlet as possible and swap to 1/4" wirebraid bay hose or mosmatic comfort hose from boom to gun.

 

[shineanddrivevulcan@gmail]

You'll get better performance if the poly product line going to the bay is 3/8", not 1/4"

To reduce changeover time, get the product manifold as close to the boom inlet as possible and swap to 1/4" wirebraid bay hose or mosmatic comfort hose from boom to gun.

What PSI would you recommend for
air
product

 

[Dan kamsickas]

What PSI would you recommend for
air
product

That's an impossible question to answer with any precision. Different chemicals perform differently at different pressures, concentrations, water temperature, etc. Also, presentation is purely subjective.

I tell people to start at 25-30 psi liquid and your air 5-10 psi less and go from there. Never allow your air pressure to get higher than your liquid pressure. I would ask the chemical supplier what tip size to start with on the hydrominder.

 

[Randy]

I run my Presoak at 110psi with a Procon pump. I use Simoniz powder Correct Presoak with a "T" at the Hydrominder and add High pressure soap in with the Presoak.

 

[Cwajciec]

I know it takes a little more effort, but put your presoak on a low pressure gun. See the below link to another post where I have a video. After fighting with various delivery issues with presoak through the HP gun, this was a huge upgrade and very well used.

Post in thread 'Presoak on Foam gun tip size'

C

Post in thread 'Presoak on Foam gun tip size'

May 28, 2025

See if you can see this link. This is 60psi flojet (and 45-50psi air) with a 4040 tip and a homemade foam generator. Without the foam generator you would get a lot of splattering from the flojet. I have the mixture pretty strong to get it to foam good. Customers use a lot of it now. Feel free to leave a review

AC WOW Car Wash · 427 S Washington Hwy, Ashland, VA 23005

★★★★☆ · Self service car wash

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• Cwajciec

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