PSI/GPM nozzle chart

I know I’ve seen PSI/GPM nozzle charts on this forum but saw this chart from pressure wash outlet and thought it was nice.


Thanks Jason!

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Thanks I was looking for this

Does this chart apply to surface cleaners as well

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Yes but you need to divide your gpm by the amount of nozzles you have to get the correct psi out of each one.

My ts2021 is 4.5 GPM with my 420cc chonda motor… I was told to use a 5.0 nozzle… That makes it 2500 psi… If I go with a 4.0 and up the psi will it harm my pump or unloader?

Why would you want to up the psi?

Just curious… I’m quite happy with what it does now … I have a GP 18" SC ith 2.5 nozzles seems to work well… I understand that volume is better I’m just curious and want to know… No harm in knowing and understanding capabilities

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Hello. I was wondering if anyone could help me figure out the PSI I am applying to concrete with my surface cleaner. I run 8gpm, 200 ft. hose, two bar surface cleaner and my nozzles read 25055. Thanks in advance.

I like this calculator, easy to use and has a chart below it for quick reference.

Multiply your orifice size by the number of tips you have on your SC and plug that number into the appropriate box. Plug your gpm into the other box and your psi is calculated. 50-100 psi drop per 100’ of hose due to friction, depends on who you ask. Elbows, fittings, gun, etc will also affect pressure at the SC.

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Easiest, and probably most accurate, way to figure that out would be with a pressure gauge right before the gun on your SC. Take your reading with the trigger pulled.