The warning on the plug is that after you finish filling up to that 10ft, you have about 5 psi in the pipe. It doesn't sound like a lot, but it can be enough to give you a good pop if you're looking right over it and it fails. You guys did a good job!
You're right, when we went to drain the system it was quite a geyser for a couple seconds! Head pressure is very deceiving, I can't imagine what it would be like if a skyscraper drain line clogged up..
I actually had the same thought and capped it off the 2nd time and it still happened! Never did find any observable leak, thinking it was just air settling somehow
Question, Mason Dixon Acres, I will be forced to do my own under slab plumbing.The contractors in area are unreliable. The state online code book was difficult for state inspectors to navigate attempting to show me the site. any suggestions I mean any??
