Does it matter where the syphon break on a return system is placed? I need to install this on my current setup, but getting to the return lines where they come out of my overflow is difficult. Can I drill a hole 12" above the return pump and run 1/4" line out of that, that will sit above the water level in my sump?? Or does this break need to be up near the lock line? Thanks
Syphon break...
- Thread starter arejayy
- Start date
uncleof6
Active member
It really does not matter where it is. If it is not disabled (99% chance that it will be) it will break the back siphon at the level it is set at. If it is above water, the hole will shoot out water, so watch the aim....
When reality sets in, it needs to be realized that anything can plug up an anti-siphon hole, and its failure probability is only slightly better than a check valve. (99% vs 100%.) The only sure flood prevention is a sump of sufficient size to contain all power out drain down. If the sump cannot handle the total power out drain down, redesign the sump, the system or both, so that it can, or replace the sump with a sump that can accomodate the power out drain down. Don't depend on active failsafe features to prevent a flood. The only passive flood prevention for power out drain down is sump volume.
When reality sets in, it needs to be realized that anything can plug up an anti-siphon hole, and its failure probability is only slightly better than a check valve. (99% vs 100%.) The only sure flood prevention is a sump of sufficient size to contain all power out drain down. If the sump cannot handle the total power out drain down, redesign the sump, the system or both, so that it can, or replace the sump with a sump that can accomodate the power out drain down. Don't depend on active failsafe features to prevent a flood. The only passive flood prevention for power out drain down is sump volume.
As Uncle says you really don't need a syphon break. As long as the outlet of the return is close to the surface of your display tank very little will drain down to the sump. I get less than an inch drain down to the sump.
