1" pitless adapter, for 4" lead free submersible installation, connects water pipe to the side of the well casing below frost level & the 1/2 connects to the pipe coming up from your submersible pump, makes a 90 degree elbow through the side of the well casing to discharge the water line under ground, top of the pitless half that connects to the pump, has a 1' npt threading into it that does not go through, this allows you to screw a piece of pipe into it to lift the pitless adapter & the pump, up out of the receiver half to disconnect, use with TV #s 123-323, 123-324, 123-325, 123-326, 123-327, 123-328 & 123-332.