Originally Posted by
2Quills
http:///forum/post/3294988
It takes a few mere minutes to clean out a check valve once every couple of months. If kept clean then yes they can be a reliable back up. I never said to be used as the only solution to prevent backflow. Perhaps he goes to set up his new rock scape here in the near future and accidentily bumps his loc-line fitting lower into the tank without realizing it. Then at least there would be something there to fall back on just in case.
Yes, the overflow box is only going to have as much water as the drain is high...unless you have a stand pipe with holes in it like he does which needs to be replaced. And unless you like the sound of a waterfall then height is a choice up to which the owner of the tank preferes.
And the more that I think about it...you're right! The fuge shouldn't see an excess rush of water when the return goes out. I don't know wth I was thinking. I've never put a 2 tank sump system together so I guess I was just over thinking things a bit. Anyhow...the way I see it, he/we decided not to go that route anyway. So it should still work out. It wasn't even about the backflow...it was about running all of the drain water through the fuge.
Sure there are a million what if's. Which is why I like to have as few of componets as possible.
Right. I mentioned the water fall effect eairler when I brought up the height. I also mentioned about the holes.
So, we agree about not getting a back rush in the refug tank. So, now I ask. How is running all the water through the refug tank first, any different then a single tank sump/refug? You've taken all the precaution you can by adding in the eggcrate material. 650ish GPH in a single tank filter is the same as 650ish GPH in a dual tank filter. By using 2 3/4" bulkheads to drain the refug tank into the sump tank. He still has the same cross section of diameter as the single 1" drain he's feeding them with.
In the end it doesn't matter to me how this gets done. Its not my tank or my money. I would just like him to have a different view since he has stated he doesn't know much about this. I would also like him to have a clear understanding of what it is he's doing. Also, should his 1" drain be on the loud side. He now knows about the Herbie style drain. Which he can easily do or modify to "SHOULD" he have a problem.