These 4 wire, black, heavy wall heat shrink splicing kits can be shrunk over a large diameter connector and still effectively seals watertight to a small diameter cable. Four butt connectors are included.Slip shrink tube on each wire, crimp connector on each wire, center tubing over connector and heat from center outward, splice is complete when sealant flows fron end of tube. Do not overheat
The tape method was the only way to make a good splice until shrink tube splice kits became available. Many installers still use tape because it has worked for them for years. You crimp the conductors together, wrap each conductor with a layer of rubber tape followed with a layer of plastic electrical tape. This makes a watertight connection and insulates the conductors from each other and the well casing. Properly done, this technique makes an excellent splice, but is very time consuming.