New guy

Welcome to 3Reef!

 

In addition to check valves (which i dont trust)make sure you have a siphon break in your return if you'er running a sump

 

Cool, I'm learnin' stuff already. I know what a check valve is, but what's a siphon break?

 

Its a little hole about a 1/4" big or so,right below the water line on your return line from the sump. when the power goes out, gravity will pull water from the tank to the sump and flood your house.w/a hole there it will drain til air gets sucked in thru the lil hole breaking the siphon.just make sure your sump will hold the extra water.

Heres a pic. 1st hole was too low

 

Im agree with NUGIO I don't trust check valves best bet is the siphon break. My cousin is a plumber used a spring loaded check valve and salt water and metal dont get along so when he came home he had 80 gallons of water on the floor when he got home. Big mess and to think he would know better being a plumber.

 

Wow, what type of check valves are you guys buying?

 

Makes perfect sense and is such a simple idea. The pic helped tremendously. I'll probably run both. Hopefully the check valve will work, but if not, the hole will be there just in case.

 

I also do not feel comfortable with the check valve

 

Cool glad the pics helped! my check valve failed due to build up of gunk in it.slowly leaked,noticed it after it was on a few months and i shut the pump down for a water change.
just do without it cause your flow will decrease.