Compressor cfm

G

Gbillings86

New member
I just upgraded my roof pump from a 5850 with 5/8" hose to a 1/2" aodd pump from PWP. Will I see a difference between a HF 30 gallon @ 18cfm (90 psi) brand new and a used dewalt 30 gallon with Honda motor rated at 24 cfm (90psi). The dewalt has the single cylinder type pump rather than the dual cylinders that 'y' at the top.

I want to reach 50' from ground for cleaning stucco. Did I mess up by not buying a 1" pump from the get go? What should I see from the 1/2"?

I got an 8 gpm hot water skid for everything else and rinsing.

Thanks
 
On a 1/2" pump the answer is no. Most 1/2" pumps max out their air requirements at around 15 CFM with some odd ones going as high as 20. For all intents and purposes, the HF will fully drive the 1/2" pump.
 
Kevin I have a 29cfm compressor and wanting to drop down to a 19 cfm compressor...... How much of a shot will I lose on my one inch pump
 
Pull up the performance curve on your pump and look at the flow difference between 20 and 30 CFM. You are going from right in the midrange to just barely enough to overcome head pressure. If you don't need the distance or volume, you 'll be okay. But if you need every inch of reach then not recommended.
 
Hmmm. Possibly. However, remember that distance is volume x pressure. Increasing either one increases distance. Everything being equal between an 1/2 and a 1" pump from a pressure standpoint (though 1" pumps do tend to be able to run a bit higher head pressure, the higher volume pump will give you longer distance. And volume also adds speed.
 
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