Patent ID: 6056873
Filing Date: 2000-05-02
Classification: A01K,C02F,Y10T

Abstract:
A unit for connection into pipe work connected to a body of water, the unit comprising a first pipe including an inlet for connection to the pressure side of a pump and an outlet for connection to the inlet of a filter, a first valve in said first pipe, a second pipe having an inlet for connection to the outlet of a filter and an outlet for connection to the body of water, a second valve in said second pipe, a third pipe connecting the first pipe between its inlet and said first valve to the second pipe between its inlet and the second valve, a third valve in said third pipe, a fourth pipe connected to the first pipe between its outlet and the first valve, the fourth pipe having an outlet for connection to waste and there being a fourth valve in said fourth pipe, the first to fourth valves being independently operable to open and close said first to fourth pipes respectively, said unit further comprising a first manifold and a second manifold, said first inlet being constituted by one end of the first manifold and the outlet for connection to waste being constituted by the other end of the first manifold, the first manifold leading from said inlet for connection to a pump to the first valve, from the first valve to the fourth valve and from the fourth valve to said outlet for connection to waste, said outlet for connection to the inlet of a filter branching-off the first manifold between the first and fourth valves, and the second manifold branching-off the first manifold between said inlet for connection to a pump and said first valve, said second manifold leading from the first manifold to the third valve, from the third valve to the second valve, and from the second valve to said outlet for connection to the body of water, the inlet for connection to the outlet of a filter branching-off the second manifold between the second and third valves.