Really glad you and anything else did not get hurt.

How much pressure do you think it had when it blew?
Some big air operated valves are taken apart the same way, BUT, they are contained by some means and released by some kind of threaded device, I have even mounted them in a lathe and released them with the tail stock.

Good safety tip!
You might change the thread title to " Hydrovac Safety Tip".

Don

Last edited by 2-Ton; 02/17/2016 1:00 AM.
1967 GMC 9500 Fire Ladder Truck
"The Flag Pole"
In the Stovebolt Gallery
1946 2-Ton grain truck
1946 3/4-ton pickup,
1953 1-ton pickup
1957 1-ton flatbed dually,
1954 Pontiac Straight Eight
Of all the things I've lost in my life, I miss my mind the most!