I know all about that 3ft down stuff. Lee broke off the freeze-free faucet at my BIL's house with the tractor and we had to dig it up and fix it. Digging through 3 feet of waterlogged Alabama clay ain't fun. And trying to get the pipe clean enough to glue is a real challenge too. It ain't a job I'd wish on anybody. And you've got to wonder, why did that one freeze and the other's didn't, unless maybe the drain field got stopped up and it couldn't drain the pipe anymore. You'll find out in the spring I guess.
I remember Alabama red clay :), fortunately, we're pretty much sandy.