This is the original constant level siphon that is the predecessor to pvc continuous siphons and over flow boxes. Originally made of borosilicate glass tubing with a hold melted as the siphon brake. Simple U tubes were used to connect tanks on the same shelf with this device on the end to allow water to flow back to sump or drain.
Suzuki TVR 5 months and 1 year. #goldfish #goldfishbreeder #goldfish - via Instagram http://ift.tt/2rrB4am
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