over, under, over...or?

[brewercm]

Now I'm confused. Unless you have water flowing through that last wall after your eggcrate you have to be going under one last time to get to your return area. Basically being over,under,over,under. It doesn't matter if that last wall is 1 inch or 12 inches away you can still only get water to the other side by going either under or through that wall.

[captexas]

So who's on third base? LMAO Reading all this over under, under over talk made me think of that old comedy skit! lol

The eggcrate section is not only good for stopping bubbles, it also helps prevent sand and other particles from being sucked into the return pump which tends to cause seals to go bad like on my Ampmaster 2100.

[eric]

As numbing as it might be...

So I flipped my drawing to match the flow direction. And added the eggcrate, which I do have. I believe leftmost wall/baffle helps keep bubbles trapped in it's rightmost compartment because they don't have the flow to carry them under the baffle, whether there is carbon/cottom/bubblebuster material #1 in there. No I believe this is exactly the same as Jaded's but allows the baffles/walls to be shifted right, making the return section larger. Your rightmost wall/baffle/piece of acrylic doesn't do anything that I can see other than take space.

Now is it really true that it flows opposite in Australia?

[jaded]

I'm not sure why thats confusing... The water is made to go under to create the compartment. The compartment is in the return section not before it. It still doesn't effect the volume or water level in the return compartment.

i.e. If you have a bathtub full of water with a pump taking water from one end to the other it wouldn't make any difference to the water level or the volume if you put a wall in the middle (other than displacement, but thats another story).

I'm only using the above analogy to make it easier to understand, the same as I used the "image the compartment is 12 inches away".

[captexas]

This is somewhat off topic but does affect the sump design -also take into account that the section at the return area is going to be the area that fluctuates in height due to water evaporation. So, if you use a water top-off system the sensor normally goes there. It is better to have a larger evaporation area so the top-off system is not constantly running to refill this section. That is one of the few flaws in my monster sump is that I made the final return section fairly small after all my baffles so my top-off pump runs frequently (not as bad now that I have a chiller).

[jaded]

Ummm sorry eric but maybe I'm not explaining this correctly... You aren't creating a baffle. A baffle is when water flows over, under, over... you have the water going under and then over into the return compartment... the last wall there is not a part of the baffle.

do you agree that in your drawing you could move the leftmost wall as far left as you wanted without effecting the water level in that last compartment? I think you do since your drawing the water level right through the wall.

can you see that if that wall has no effect on the water level that you only have 2 walls in your baffle?

you are correct... an extra piece in the baffle will take up another 1"-2" of center/right section space but it is neccesary if you wish to have a baffle.

Did you look at the site I linked to earlier... that guy is much better than I at explaining this stuff... I'm sure your design would work. If you decide to go that route please report back on your results!!!