Patent ID: 7370668

Claim:
A method for winterizing a swimming pool pipe having anti-freeze therein and having a first end bordering an aperture in a swimming pool wall, said method comprising the steps of: a) connecting and providing a one-way valve to the first end of the swimming pool pipe, wherein the one-way valve for use in discharging fluid from a swimming pool pipe to said first end bordering an aperture in swimming pool wall comprises; a valve housing having an inlet and an outlet and securable to the pool pipe for receiving at said inlet fluid discharged from said pool pipe; and a valve gate within said valve housing comprising a plug and a control plate fixed perpendicularly to the central axis of the plug, the periphery of the control plate extending radially beyond the plug and having at least one flow aperture, wherein said valve gate is moveable within said valve housing to a first position having said at least one flow aperture spaced from said valve housing for permitting fluid to flow through said valve housing and to a second position having said at least one flow aperture adjacent said valve housing for occluding the flow of fluid through said valve housing; b) attaching a first end of a hose adaptor to the one-way valve outlet, wherein said hose adaptor comprising; a substantially cylindrical rubber housing and both ends of said housing having an aperture, a flow channel traverses longitudinally through said housing forming a tubular passage, a adaptor inlet, wherein said adaptor inlet having a circumferential, inward extending lip, wherein said lip is configured for attachment to said one-way valve at a groove of said one-way valve; c) attaching a second end of said hose adaptor to a hose, wherein said second end of said hose adaptor comprising a threaded plastic external surface for attachment to said hose; d) pressuring the anti-freeze within the swimming pool pipe; and wherein said one-way valve i) opens under the pressure of anti-freeze pumped against said valve inlet, and ii) closes under the pressure of pool water against the valve outlet.