A wirelaying apparatus and method using a tool (30) having a cutter (31) operatively opening a cut in the interior bore surface (11) of a cylindrical pipe fitting (10), laying wire (12) into the cut and closing the cut using a flange closer (33). The wire (12) is delivered into the cut via an aperture (32) through the cutting means (31). Delivery of the wire (12) into the cut is thereby improved, overcoming the problem of wire running free within the fitting. In a second embodiment (see Figure 12) the cutter (31) is rotatably mounted allowing a double helical coil to be formed without removing the cutter from the bore surface.