Toronto scarz
Aquarium Advice Apprentice
I'm finally done all set up for my 240 gal upstairs. My sump is in basement. I'm using 3pc 55 gallon barrels. emergency overflow for for last barrel runs straight into drain. I don't believe It will ever get that high. My question is. Do I need a check valve for my return line? I have a ball valve and a union after pump. If power ever goes out... Is it bad for pump to flow opposite way? I'm not worried about overflow. I'm worried that the check valve will slow the water flow down. Is the check valve only in case of over flow or does it save the pump???
