How to know the size of your Syphon / Siphon

Another common question we regularly get asked is "what size Syphon do I need to order?"

Most Syphons range in size from 7.5" up to 10.5" in height, for the Macdee range of Siphons you measure up from the bottom of the bell housing, to the lip of the top cap, where the two plastics join.

You can see the guide below for reference: