Just bought this pump and installed it for our 300ft deep well. Someone wrote in another review, that it said on the box, that it comes with a check valve but none was in the box. The check valve is built into the end of the pump. If you look in the end of the pump you can see it. Also comes with wire crimp connectors and heat shrink. The heat shrink has a coating on the inside, that I think is like hot melt glue. As you heat the heat shrink the glue inside melts. As it shrinks against the wire a little bit of the glue comes out forming a tight waterproof seal.

Purchased and installed on June 3 2015 it lasted till June 6 and check valve failed and pump quit last pump come from tsc lasted 10 years it was a shur dry don't now why tsc changed but I wouldn't recommend a county line pump unless you like pulling your well often