Low cost, low pressure, solar heated fence surrounding a swimming pool

A combination fence and solar heater for swimming pools, of the type having a plurality of vertical fence posts and hollow fence panels forming a continuous fence around the periphery of the pool, said panels having interior chambers interconnected with each other and with the water in the pool to form a water carrying passageway from the pool, through said chambers, and back to the pool and having a water pump for circulating pool water around said passageway for warming by the heat of the sun, characterized by:

• said fence panels and fence posts being in substantially the same vertical plane, with each panel supported in the space between a pair of adjacent posts;
• each said fence panel comprising a pair of closely spaced, corrugated, plastic sheets, of relatively broad area, peripherally joined along the edges, with the ribs and grooves of one sheet normal to the ribs and grooves of the other sheet so that the interior chamber therein is thin, free of obstruction to vertical flow and of relatively wide area;
• cross bracing means between said sheets for preventing bulge thereof under water pressure;
• a flow control valve mounted between said pump and said fence panels for establishing pressure at no more than about 3 psi and rate at no more than about 60-70 gallons per hour per panel;
• a back pressure valve mounted between said fence and said pool for assuring substantially even flow to all panels of said fence;
• and an open air and water riser pipe connected to said water carrying passageway at the top of a panel to prevent build-up of destructive pressures tending to bulge said panels.