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Old 13-06-2019, 12:54 PM   #1
bigkahunaburger
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Snow foam lance (MTM Hydro PF22) - How to adjust for maximum foam output?

Hi guys,

I've recently bought a MTM Hydro PF22 foam lance. I have yet to use it but when I do, I would like to calculate the PIR correctly when using Auto Foam and similar quality products.

My issue is that I am not sure which way to twist the knob (regulator?) on top for maximum foam (most solution in the bottle used).

Do I turn the knob all the way to the left (to the - side) or do I turn it all the way to the right (to the + side).

I am aware that with some lances, you are meant to turn to the left (- side) for maximum foam but on others you must turn to the right (+ side) for maximum foam.

Does anyone know which way to turn it with the MTM PF22?

I have looked at their instructions but I am still unsure. Here they are:
MTM Hydro PF22 instructions

They seems to say I should be turn the knob to the right for more chemical draw. Surely more chemical draw from your soultion would equate to higher foam, so turning the knob to the right (+ side) gives maximum foam.

I have had an Autobrite lance and an In2Detailing once. With both of these lances, I found that turning the dial/knob all the way to the right would give me the most foam. But the from reading posts on here, it seems other people thought differently.

I don't mind if I have been doing it wrong but I would like to get it right this time around
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Old 13-06-2019, 01:09 PM   #2
MBRuss
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Mine is to the + side. Though TBH it would take you all of 2 secs to realise this once you turn it on and twiddle the knob!

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Old 13-06-2019, 03:24 PM   #3
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Quote:
Originally Posted by MBRuss View Post
Mine is to the + side. Though TBH it would take you all of 2 secs to realise this once you turn it on and twiddle the knob!

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See this is what I thought but when so many people are saying that you turn it all the way to the left (to -), you start to get paranoid

I did think I had it right when I was trying to calculate the PIR and had filled nearly two buckets with liquid still remaining in the bottle though. Lol

My Karcher K7 puts out so much water that I need to get this right to make snow foam worth bothering with.
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Old 13-06-2019, 05:20 PM   #4
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Well turn it fully one way and if no foam comes out then turn it completely the other way... Simples!

I think you're overthinking this somewhat...

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