Knowledge Base:  
You are here: MSDS > Fusion Gun Questions
Flushing the "A" Side hose. How many gallons of fluid do I need to flush it out?
Last Updated: 02/12/2013
I get asked this all the time, so I thought I would play around and tell you how to figure that out.

A 3/8" hose.
Remember Math class and saying "when will I ever need to know - πRē  (Pi x Radius Squared)?"  Well look at yourself now.

3/8" = .375" diameter. the radius is 1/2 of that.  .1875
.1875 x .1875 x 3.14
Thats .110 cubic inches of space inside the 3/8" hose per inch of hose.

50' of hose is 600 inches.  

600 x .110 = 66 cubic inches in a 50' hose.

1 gallon has 231 cubic inches.

If you have 200' of hose, you have 66 x 4 = 264 cubic inches. 1.14 gallons to fill the hose. (add a little for the fittings at each end of each hose)

Was this article helpful?


Related Articles
 > No Purge Air
 > Chambers resurfaced on sandpaper
 > : My gun has a very slow response when I pull the trigger. Its not as fast as it used to be.
 > My chamber broke on the lock tab (or piston were the chamber locks on)
 > HOT WEATHER problems with spray foam.
 > No fan pattern when spraying, it's just a pee stream
 > O-Rings - Are your the same as Graco?
 > Boiling parts in antifreeze. Manufacturers love it when you do.
 > SPF Solvents: What to use for everyday cleaning.
 > My side cartridge broke.
 > What can I use to flush my "A" side hose?
 > Proper shut down of the gun at the end of the day