So I figured I would post some stuff about my sump/fuge plumbing. When I was setting my tank up, I was always interested in seeing this type of thing, so maybe it will help someone else who is trying to decide what to do about a sump/fuge. Maybe they'll see what not to do :lol:
I started with a couple of rubbermaid style tubs. I think they are about 22 or 25 gallons each. They are connected with two 1.5" pipes. I also have them screwed together at the top with some stainless steel machine screws and wing nuts. I had to do something like this because I couldn't get any decent size single tank under my stand. I wish I would have done a little more research before designing the stand. I would have made a removable part between the door openings or something...
Originally I wanted to use Uniseals, but my cheap hole saw cut the holes in the tubs too large (it was wobbling - thank you Harbor Freight) so the uniseals were dripping. So I decided to go with some nice beefy schedule 80 bulkheads. But I also had to figure out what to use between the two tubs to seal one wall to the other. Otherwise the bulkhead would leak through the threads and drip down inbetween the tubs.
I found some nice thick rubber rings at Lowes that worked great. I was able to crank the bulkhead tight and get a good seal between the tubs. Here's some pictures from when I was checking for leaks. I wanted to use two big bulkheads just to make sure there is always nice free flow back into the sump with very little chance for a clog and flood.
You can see the two 1.5" bulkheads in the upper right and also a 1.5" bulkhead in the lower left that is for the sump return pump (sequence dart).
I also cut away the wide top edge of the tub where the two tubs connect which allows them to sit closer, better for the bulkhead connections. You can also see what will deliver water to the sump return pump.
So here is the current setup. This is the left half of the stand. The closed loop pump (dart) is on the left. The sump return pump (also a dart) is on the right.
The return pipe goes up and then right after it turns horizontal there is a tee. The tee has a gate valve on it and is used to feed the refugium. This is where I plumbed the UV in. So now the the water goes through the UV and then into the refugium.
Here is the right half of the stand. You can see the two tubs. The water comes into the tub on the right into a DIY bubble trap. Also in the bubble trap is the mag 9.5 that feeds the skimmer. The tub on the left is the refugium. The UV is mounted vertically just out of sight on the left. Against the back wall are the two 1" sump return lines. The tee is just out of the picture.
In the next picture you can see the UV along the left edge and the sewer fitting that I use to split the sump return from one 1.5" line to two 1" lines.
Here's the bubble trap that I am using in the sump. I think it is working allright. I don't really have any microbubble problems.