A sealing system for sealing a joint of a structure, including a first section having an inner wall, an outer wall and a contact surface extending therebetween, a second section having an inner surface, an outer surface and a contact extending therebetween, the contact surfaces of the first and second sections being in contact with each other, thereby forming a joint. A void is defined by a portion of the contact surface of the first section and a portion of the contact surface of the second section, a port extends from one of the inner surface and the outer surface of the first section to the annular void, and liquid grout disposed in the void and the port.

A kit, and an assembly formed with components of the kit, comprises a fitting for the top of a septic tank or water tank, one or more frusto-conical rings shaped to interconnect with an identical ring to form an undulating wall riser that extends upwardly from the tank top fitting, and a lid. The lid is shaped for multi-purpose use: closing off the opening of either the large end or the small end of a ring/riserwhichever is uppermost, or closing off the fitting when there is no riser. Joints between the rings of the riser, and between a ring/riser and the fitting of a tank, are held together by latching tabs and/or screws. A fitting may be integral with a tank top.

A sealing system for sealing a joint of a structure, including a first section having an inner wall, an outer wall and a contact surface extending therebetween, a second section having an inner surface, an outer surface and a contact extending therebetween, the contact surfaces of the first and second sections being in contact with each other, thereby forming a joint. A void is defined by a portion of the contact surface of the first section and a portion of the contact surface of the second section, a port extends from one of the inner surface and the outer surface of the first section to the annular void, and liquid grout disposed in the void and the port.

A plastic article useful as a riser assembly for a septic tank or as part of another structure is comprised of a multiplicity of identical shape conical wall plastic risers. The risers are attached to each other at joints by tabs which engage rim segments; each end of the riser has alternating tabs and rim segments. A riser assembly wall undulates in the lengthwise direction. The risers nest within each other for shipment or storage.

A tank wall connection includes a base having a base recess and a wall having an end positioned in the base recess. A grout is filled in the base recess around the end of the wall. A caulk is disposed at a wall joint between the wall and the grout. An epoxy layer is disposed over the caulk and the grout at the wall joint.

A manhole sealing device to prevent environmental water from entering a manhole through the joint between the manhole casing, manhole cover, and cover frame. The device comprises a disc shaped inflatable seal for insertion into the upper portion of the manhole and inflated to provide a sealing means to prevent infiltration of water from the environment to the interior of the manhole. The disc shaped seal may include a first rigid stabilization portion surrounded by a flexible inflatable seal wherein the stabilization portion supports and assists in maintaining a seal to prevent water or other fluids from entering the manhole through the cover or the corbel joint thereof. The manhole sealing device can be installed in an existing manhole without replacing any of the structural parts thereof.

A manhole sealing device to prevent environmental water from entering a manhole through the joint between the manhole casing, manhole cover, and cover frame. The device comprises a disc shaped inflatable seal for insertion into the upper portion of the manhole and inflated to provide a sealing means to prevent infiltration of water from the environment to the interior of the manhole. The disc shaped seal may include a first rigid stabilization portion surrounded by a flexible inflatable seal wherein the stabilization portion supports and assists in maintaining a seal to prevent water or other fluids from entering the manhole through the cover or the corbel joint thereof. The manhole sealing device can be installed in an existing manhole without replacing any of the structural parts thereof.