waves at different times to better explain what is happening we will stop the wave at different points to show what is happening at different stages the syphon wave generators may have two or more vertical inlet outlet pipes 14 or vertical intake pipes 26 and vertical exhaust pipes 46 the units with only two vertical inlet outlet pipes 14 do not need valves as the water will flow back and forth through the units units with more than a total of four vertical intake pipes 26 and vertical exhaust pipes 46 are best if equipped with inlet and outlet valves so the water will flow in only one direction i will first explain a basic two vertical inlet outlet pipe syphon wave generator in one aspect looking at fig4 we see a basic syphon wave generator mounted in the ocean floor 42 before operating all the air must be removed from inside the generator the best way to remove the air is to connect a self priming pump to a service valve 47 in fig1 at the highest part of the generator this pump not shown could be temporarily connected or permanently mounted to the unit with a manually operated switch or with a float type switch an automatic float switch would be recommended in locations where air might enter the unit in fig4 we see the crest of the wave waterline 44 is at the right vertical inlet outlet pipe 14 a the water height.