Abstract: A sealing set may be used for sealing and draining a liquid and may comprise a check valve and a mating press unit. When the check valve and the mating press unit may be separated, the check valve may be sealed and may prevent flow of liquid or gas from the first end to the second opening, and when the mating press may be pressed against the check valve so that the third end is inserted into the second end, a flow of liquid or gas may be opened between the two ends. The check valve may comprise a hollow elongated cylinder; a sealing gasket; and a mass and a pressing means configured to press the mass against the sealing gasket for sealing an end. The press unit may comprise a second hollow elongated cylinder and may include one or more holes on the third end perimeter.

Abstract: An apparatus may be used for isolation of a wall or a surface between internal and external environments. The apparatus may comprise an enclosure housing a metal plate and configured for sealing and attaching to the wall, and any metal plate herein may be having at least first, second, and third openings for passing pipe, cable, or gas through the wall. The apparatus may further comprise sealing nuts installed in the first, and second openings for passing a cable or wires while sealing the first and second openings; and a sealing nipple installed in the third opening and operative to pass gas via a pipe between the internal and the external environments while sealing the third opening. The metal plate may comprise holes and may be attached to the enclosure using multiple threaded screws and nuts via the holes.