I wish I had great stuff foamed the 4" PVC pipe I had put thru the concrete foundation on my garage ,that was intended to be used to bring the power wires,phone,etc,into the building,that so far hasn't been done...
The pipe goes in the foundation about 2 feet below ground and has a 90 degree elbow ,and a straight section sticks up out of the concrete floor..the circuit breaker box was going to be mounted right above it..
I added another elbow outside the foundation so a straight section could be sticking up out of the ground,so I could fish a phone cable and TV coax into the building and I put a 45 elbow on the straight piece so rain cant just fill the pipe up..
But evidently water can get in the pipe because I can see some at the bottom of the straight sections where the pipe passes thru the concrete,it looks like a "P" trap under a sink..I've had to stuff rags in the pipe inside the building,after I had a mouse end up dead in the water in the pipe (talk about ungodly stench!
If I ever get the cash to have a trench dug to the house and install a proper electrical system I'm going to fill the pipe with the foam stuff after all the wires and power cables are routed..
I'd love to have running water in the garage,but its just too much of a hassle,the pipes will likely freeze up..I get by with a garden hose during the warmer months..