Ok, Im new to the field and even newer to plumbingzone. I will be taking over a plumbing business in philadelphia in 5 years when my old man retires. Ive searched far and wide to figure out what the technical name for the missile, aka bullet, that bores holes in the ground in order to feed copper through it for water lines. Ours needs to be serviced or replaced. Any info or suggestions on either would be great since its been serviced 3 times now and keeps braking.