XSiVE
New member
<a href=showthread.php?s=&postid=10466831#post10466831 target=_blank>Originally posted</a> by billsreef
It's not the surface area of the "bowl" that makes that design work in your toilet, but rather the large diameter siphon break in your houses drain plumbing that extends up to the roof
well yah, to STOP the siphon..
but what im saying is at what point does the air+water pressure on the surface of the water in the bowl cause it to flow uphill into the trap and on down..
like in this guy's tank, if you started filling it up, how far up in the tank would the water level get before it had enough air pressure on the surface to force water up thru the u-tube and down into the sump... would it be the level of the bottom of the U or before?
tho its a great idea to essentially make a "stink pipe" on the outward side of the U to make sure the siphon breaks.