OK - Looking for opinions / advice on the following plan for plumbing my sump return. Note a few things
- I'll have the main drain submerged with a large screen pipe to avoid clogging. This should give me a full siphon thru a 1.5" drain that I can control with the gate valve. This will make the drain pretty much silent. And if it clogs, no worries since I have another 1.5" drain that will start flowing once the water rises above the overflow inside the tank. More info on this system can be found here:
http://archive.reefcentral.com/forum...hreadid=344892 At the end of the drain line I was thinking of putting a TEE so that one leg was loosely connected to my skimmer pump. That way fresh tank water would get put into the skimmer right away, and any extra would exit the other leg of the tee.
- The sump return will feed a jandy valve with actuator. That will alternate flow between two 1" return lines that come back up over the overflow and down under the sand. Each of these 1" lines will have two penductors on it. The flow will alternate every few minutes so it will just get established in one direction and then will be switched to the other direction. I'm a little worried about creating a big whirlpool though - but my closed loop should keep that from happening maybe... Here are some links regarding penductors / eductors:
http://www.kthsales.com/website/Misc...nthusiasts.htm
http://archive.reefcentral.com/forum...s&pagenumber=1
And here's some info on the jandy valves. There are some RC'ers using these. With an occasional greasing of the o-rings they seem to be working well.
http://www.poolwaterproducts.com.au/...ts_dvalves.htm
For a return pump I'm thinking of the sequence Tarpon
http://www.mdminc.com/Tarpon.htm
One specific question I have right off is how can I return the fuge water to the pump area without making bubbles that the pump sucks up? Need more baffles? Maybe a small baffled chamber right there where the return is? I was thinking of a TEE with one leg up and one leg down at the end of the pipe, so the bubbles might go up...
So here's my plan, let me know what you think:
