Valve

A water heater arrangement comprising a valve assembly, a tank, a cold-water supply pipe, an internal cold-water pipe and a hot-water delivery pipe;

• the valve assembly having a first connection for the cold-water supply pipe, a second connection for the internal cold-water pipe and a third connection for the hot-water delivery pipe and a check valve;
• the cold-water supply pipe, the check valve and the internal cold-water pipe being parts of a flow path leading pressurized cold-water to a bottom of the tank;
• the valve assembly further comprising a cavity, the cavity and the hot-water delivery pipe being coupled to an eight connection forming of a flow path leading hot-water from a top of the tank;
• wherein the water heater arrangement further comprises a suction pipe, a circulation pump, an external cold waterpipe, an external return pipe, and an internal return pipe and an external heat source, wherein the valve assembly has a fourth connection for the suction pipe, a seventh connection for the internal return pipe, a fifth connection for the external cold water pipe, and a sixth connection for the external return pipe;
• the suction pipe, external cold water pipe, circulation pump and the internal return pipe forming a flow path for cold-water from the bottom of the tank, through heating by the external heat source to a middle of the tank;
• and the arrangement further comprising a hot-water cabinet coupled to the hot-water delivery pipe and a hot-water circulation pipe coupled between the hot-water cabinet and the valve assembly;
• the hot-water delivery pipe, the hot-water cabinet, the hot-water circulation pipe and the internal return pipe forming a path for circulation of hot-water between the tank and the hot water cabinet and back to the middle of the tank.