Modular solar collector system

A modular solar collector system comprising a plurality of manifold sections, said manifold sections including male and female ends adapted to fit into each other;

• a plurality of tubular collectors connected between said manifold sections;
• connecting means for connecting said collectors to said manifold;
• said connecting means including fittings on said manifold sections adapted to receive said tubular collectors;
• and annular locking means adapted to fit over said fittings and said collectors when they are connected;
• said fittings having a nipple shape and including two exterior surfaces of different heights, the junction of which forms an annular shoulder perpendicularly disposed to the axis of said nipple, the edge of which forms a peripheral sealing ring, one of said surfaces tapering downwardly toward the front of said nipple, said annular locking means having two inner tapering surfaces disposed at different angles relative to an axis of said locking means, an annular shoulder formed at the junction of said two inner surfaces and perpendicularly disposed to the axis of said annular locking means, and having a peripheral rim, said peripheral sealing ring of said nipple cooperating with the inner surface of said tubular collector to form a seal when said annular locking means is in place, and said annular shoulder on said annular locking means cooperating with the outer surface of said tubular collector to form a pressure junction to compress said collector tubes at a location adjacent said seal to insure a tight connection at that point.