Please ease my troubled mind (sump question)

[Brisc0]

Hey everyone, got a little sump issue. (first sump, just got it up yesterday)

Im using an 800GPH overflow (1" sch40) to go to sump and a 9.5 mag to return (2" sch40) I have ball valves on both pipes to provide shut off and throttle control. Now for the question. I think I have both lines in sync. I watched it close for about 6 hours last night before bed and the waterline in the sump was very stable, however this morning the sump water line is down about 1/4". I have the water at 78 degrees, is this just normal evaporation or do you think I am just a hair out of sync? Any suggestions on how to be sure? Thanks everyone and happy new year!

[loganj]

The line from the overflow to the sump should be wide open. The overflow can only return what the pump puts in the tank. You should be able to run the line from the pump wide open as well...the Mag 9.5 won't be doing more than about 700 gph with the head pressure. I expect the 1/4" drop was due to evap.

[Brisc0]

This was a strange thing for me regarding the throttling of the lines, because I had to valve back the return line almost 75% and the overflow about 10% (overflow was only to prevent toilet noise) The return however is baffling me because the head at 5ft with three 90's should be only returning 650-700 at best wide open but if I crank it wide it begins to raise display tank waterline at incredible speed.

[Bearfan]

I had to throttle back my 9.5 and leave my sump supply line wide open. The level I watch is inside my overflow, this is how I adjusted my return line. If the water level was about 1/4" above the vacuum breaks, I was happy, open it a little more and the water level gets too high, close it a little and you get sucking noise.

[mrrrkva]

1/4 inch should be due just to evaporation, I would keep sump supply line wide open. Do you have Durso's They help the gurgling sound

[Brisc0]

Well I have the line wide open again and everything is fine, but gurgle is really bad. What is a durso?

[fishfreek]

Search "durso stand pipe" or look in the DIY forum as I know theres a few posts there about it. Its a way to help quite down noisy overflows.

[Brisc0]

Alright, strangest thing. I started to play around with the overflow leveling screws cause it didnt' look quite right, and now im running the return and overflow wide open with no gurgle. However this is great but it has caused me two new problems.
1.) The overflow is pouring into the sump so fast its clouding the main tank with millions of microbubbles.
2.) There is no longer a gurgle in the overflow, however now my sump sounds like a hot tub.

Any suggestions?

[scuba_steve]

as for the gurgling an easy fix imo with out losing water flow is get ya self a nice surround sound system like bose and with the tv on ya wont hear it heheh
mine make a ton of noise but when it doesnt i worried somethings not right
pluss ya get used to it like livin next to an airport or by train track before ya know it ya dont even know a planes flew over