Plumbing Help

[Acro]

Hey Guys,

I don't care for the one way valve under this application either. They may work for 20 years but if something like algae, snails ,chitins, or a limpet are in the path of the rubber flap when power fails the rubber flap can not close properly. The hole drilling thing seems to work, one just needs to keep an eye on them,water will come out of the hole which decreases the chance of them gumming up. I think the best bet is so keep the return lines as close to the water surface as you can, this way minimizing the amount of water back siphoning into your sump. You just need to figure out what the safe running level of your sump will be.