Ok. Still can’t grasp a sump not overflowing.
The power goes out. The line running from the sump to tank might backfill, but a check valve would stop that.
But gravity continues to send water down the line from tank to sump. With a overflow box, or holes drilled high in back of tank, I understand that the water would stop siphoning out once it reached the overflow point
But what about tanks that are drilled on bottom?! I am seeing a lot of these tanks at LFS. If drilled on bottom, wouldn’t tank just keep overflowing?!
Don’t check valves only function in outlet line (can’t work on inlet?)? Am I wrong? Help?!!
Someone please educate me. What am I missing?
The power goes out. The line running from the sump to tank might backfill, but a check valve would stop that.
But gravity continues to send water down the line from tank to sump. With a overflow box, or holes drilled high in back of tank, I understand that the water would stop siphoning out once it reached the overflow point
But what about tanks that are drilled on bottom?! I am seeing a lot of these tanks at LFS. If drilled on bottom, wouldn’t tank just keep overflowing?!
Don’t check valves only function in outlet line (can’t work on inlet?)? Am I wrong? Help?!!
Someone please educate me. What am I missing?





