Which rigid cutter 150 , 151 or 15 ? Whats the difference? Also how is the Klein (88904) four roller cutting tool ? Logged

Recently my plumber friend removed my jet pump and replaced it with a submersible pump that goes down into my shallow well (32 feet). To make the job much easier he used the old 1 1/2" plastic water line that is about 25 inches underground and that goes from the well to the basement through the cellar wall as a conduit for the new 1" water line and the electrical wire. Where the new pipe and wiring go into the old plastic line is 25 inches underground but he didn't caulk the larger pipe and now water from the pit goes into my basement through the 1 1/2" pipe. I tried using foam in a can where the water goes into the pipe outside in the well pit but that didn't work. He told me I should just caulk it inside where the pipe and wiring enter the house but I think it's better to caulk where the water comes IN and now where it goes out. My question is what kind of caulk or other material should I use to close it up outside where I'm sure there will be water? I had to dig down to get to the pipe but I didn't close it back up yet and I would rather do something to prevent that water from entering that pipe. Thank you for any suggestions. Rich