Drain line into sump?

Ok, so not knowing any better, and wanting to keep the noise down, I have my 1" drain line under about 3" of water in the sump. Is this the wrong way to terminate a drain line? Meaning, should I have it above the water line?

 

Mine terminates under the water line into a filter sock has been that way for the last 5 years no problems you should be fine.

 

Nothing wrong with that, unless you are getting noise from large air bubbles, bubbling up from your drain pipe through the water in the sump. If you are happy with the current noise level, leave it as is.

Personally, I found the bubbling noise distracting when I ran my drain line under the water level of the sump. I subsequently cut the drain pipe to just above the water level, and added a filter sock to the end of it. The sock drapes down to the water level. That way, water drains directly into the sump water through the bottom of the sock (which is at water level) with no splashing sound, and air can exit through the top of the sock (which is exposed to air) with no bubbling sound. Just a suggestion.

 

Sounds like you found your solution - if its works and you like it than its fine. I personally have my drain above the water surface to help with degass. Noise is always a concern, in your case I probably would have done the same thing. No worries.

 

I think the noise often associated with plumbing starts at the DT, rather than the sump. In my experience, this noise has always occurred at the overflow. Whether it be an HOB overflow box, or a standpipe situated in the overflow area of a drilled tank--this is usually where the noise originates.

I think it makes little difference whether the overflow plumbing terminates above or below the waterline of the sump. If the top is plumbed correctly, most of the potential problem is overcome.

 

I appreciate all of the input. What I've noticed is it seems to work pretty well as long as I keep my return turned down a little. If I try to turn the return pump up (via a gate valve) then it looks like the drain flows really well, and alternately sort of backs up the hose from the sump a bit, then gurgles back down into the sump. The noise is at the sump, not at the overflow, and I'd like to be able to get more flow from the drain, and the return. So maybe the sock idea?

 

hmmm....that's a horse of another color

Sounds like you have air in the drain, let it run and it *may* work itself out. Does the drain run vertically or do you have an angle? you could install a vent as well, that will release the air bubble.

Edit - can you drop a pic of oyur overflow?

 

If you have soft piping on the drain, simply roll it up in a circular pattern to raise it up out of the sump, open the return pump and see how it performs. If its hard piped, cut the drain pipe right above the water line and test. If you decide later that you wanted it ending in the water, you can add a coupling and drop it back into the water. If your drain is "gurgling" where it sucks water down, the water level drops, it fills back up and repeats itself, it could be head pressure from the water in the sump not letting it drain properly. Something to test. If raising the drain up out of the sump doesn't alleviate the gurgling action, then you have an issue in the standpipe in the tank.