An apparatus for installing a valve in a hollow body. The apparatus includes a first member and a second member, wherein a part of lengths of the first and second members are complementary to each other to accommodate the first member circumferentially over the second member at the complementary part. The second member is configured to be inserted in a hole on an outer surface of the hollow body; advanced inside the hollow body while retaining the first member against the hole; and withdrawn from the hollow body while retaining the first member against the hole. The apparatus is configured to install the valve into the hollow body while the first member is retained against the hole, and wherein the first member is withdrawn upon the installation of the valve into the hollow body.