Shut off valves for my plumbing?

[mudbuttjones]

I've never put a shutoff on a return unless I had it teed off to multiple returns or had it with a tee that fed back into the sump.



Skip the check valve, just put the return so it cant drain much back into the sump. A check valve will impede flow some, and will require periodic cleaning to make sure it actually works when it comes time to use it. Too risky imo.

But I have put them on drains, its nice to be able to block a drain for maintenance or w/e

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[mudbuttjones]

View attachment 1067368
It wouldn't let me post this before.

That's how far my return is on my 90. I have one on each side. When i shut the power off I prob only get 5 gallons in the sump from the returns and whatever is in the overflow

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[duanes]

I put a Tee on my sump return, when I open the valve below the Tee, instead of water going to sump, it goes to my yard. This makes water changes quick and easy.
When water is drained down enough, open the valve and water flows back to sump.
I can do a 50 gal or more water change in just a few moments, with no effort.

When the red valve is in the closed position, as above, water is cycling thru the sump.
When open, old water flows by gravity, directly to the garden.

 

[the lion who ate the sun]

I love that idea. I do something similar with a python. I fill the hose, drop the siphon in the tank, and put the other end at the end of my deck so that it drains directly into the flowerbed. Your game plan seems even easier. Only issue is I'm using hose and not PVC.

 

[fishguy306]

I'm going to agree with Mudbutt again, ditch the check valves and plan your system so it doesn't need them. With a sump that large you shouldn't have many problems holding extra water. Check valves will slow down water and tend to fail when you need them most.