Abstract: An automatic boat drain for siphoning water from the interior of a boat, the drain including a flow tube secured to the exterior of the boat transom with the inlet end of the flow tube being below the water surface and oriented so that water is forced to flow through the flow tube as the boat moves forward above a minimum speed, the outlet end of the flow tube being above the water surface, an entraining tube having the inlet end adjacent the interior bottom of the boat, and a venturi forming connection positioned above the water surface connecting the entraining tube outlet end to the flow tube adjacent to and spaced from the flow tube outlet end whereby as the boat moves through water the flow of water forced through the flow tube will produce a venturi effect to drain water from the boat interior while the venturi positioned above the water surface prevents the possibility of water being siphoning into the boat.

Abstract: A filter assembly having an extruded filter head. The extruded filter head is composed of a generally flat base and a domed upper section which is connected to the side edge of the base. A central wall extends between the base and the upper section and defines longitudinally extending inlet and outlet chambers, each of which has a uniform cross section throughout its length. Fluid to be filtered is introduced into the inlet chamber and is withdrawn from the outlet chamber. One or more filters are mounted on the underside of the base. Each filter is provided with an inlet opening which is connected through a port in the base to the inlet chamber and is also provided with an outlet opening which is connected through a second port in the base to the outlet chamber. The extruded construction provides improved mechanical strength for the head, and substantially reduced porosity as compared to a cast head.