A repair tool for use in repairing a break in a water main pipe comprises a saddle member which includes a downward facing pipe-engaging surface that is configured to conform to an outer diameter surface of the pipe, a sealing member which is attached to the pipe-engaging surface and is configured to seal between the saddle member and the pipe, a brace member which is connected to the saddle member and includes first and second end portions, first and second arm members, each of which is pivotally connected to a corresponding end portion and each of which comprises an upper end portion that extends upwardly from the brace member and a lower end portion that extends downwardly from the brace member and inwardly toward the other arm member, and a clamping arrangement connected between the upper end portions for moving the upper end portions toward and away from each other to thereby move the lower end portions away and toward each other, respectively. In use of the repair tool the saddle member is positioned over the break and the clamping arrangement is operated to move the lower end portions towards each other and into engagement with a portion of the pipe located opposite the saddle member in order to secure the saddle member to the pipe and thereby seal the break.