LOL that is a siphon..........redtailshark1;4051514; said:Sorry i wish not to agree, overflow boxes do not use siphon, they use the gravitational water level corrections and the gravitational weight of the water pulling it down the tube
it's basicaly a restartable siphon
i have built a DIY overflow works just as good as commercialy bought ones only flood ive ever had was a result of me not cleaning the mesh prefilter (which is my fault not the overflow's) ive shut the system down plenty of times and it ALWAYS restarts
Whether you like it or not despite what overflow box companies have told you so that they can steer you away from DIYing (so they can get more money in their pocket) both DIY and thier overflows use a siphon, that when it stops the water equalizes on both sides of the box so that no air gets into the part that goes over the edge of the aquarium. gravity keeps the water in the bottom loops(where above it is a partial vacuum) so as soon as water rushes in it want's to fill in the negative space and this restarts the siphon.