Pressure relief device for swimming pools

Abstract

Pressure relief assembly for a swimming pool that presents a smooth surface to the upper surface of the bottom of the pool when the valve is in a closed position.

Having thus described my invention what is desired to be secured by Letters Patent of the United States is set forth in the appended claims. 
     
         1 . A pressure relief apparatus for incorporation into the bottom of a swimming pool comprising:
 a receiver having a generally stepped cylindrical cross-section with a large diameter portion of said receiver adapted to be incorporated into the bottom of said swimming pool with an upper surface of said large diameter positioned flush with the an upper surface of the bottom of said pool adjacent water in said pool; and a smaller diameter portion of said receiver containing internal threads being of sufficient length to project through said bottom of said pool into a water accumulation structure underneath said pool.   
     
     
         2 . An apparatus according to  claim 1  including a pressure activated relief valve incorporated into said large diameter portion of said receiver, said pressure activated relief valve so constructed and arranged to be contained within and flush with said upper surface of said receiver when said valve is in a closed position. 
     
     
         3 . An apparatus according to  claim 1  wherein said device is fabricated as a single construction from a pool water compatible material. 
     
     
         4 . An apparatus according to  claim 2  where said relief valve is a spring loaded pressure activated device.