johnr2604
Member
Yep, sorry I didn't elaborate. Looks like your drains come out and 90 down. The waterfall your hearing is the siphon not breaking. install a 90 then put a piece of PVC up with a cap to where its above the water level. Drill a hole in the cap starting small then getting larger untill it quiets down. If you want to get it even quieter then install a bottom durso also. This would be placed right before the water hits the sump and is built the same as the external durso.