Multiple out flows with 1 return line?

  • We are currently upgrading MFK. thanks! -neo
Just do the math on the area of whatever size pipe you use for returns, and divide by 4 and find a pipe size with something close to that. Remember tho that you will have some friction losses due to the size change and any fittings you use, keep that in mind when sizing your return main line size.
 
  • Like
Reactions: SingAlongWithTsing
I always size the outflow lines from the tank to sump, to be large enough to not easily plug up with gunk.
1/2" lines out, will need regular cleaning (brushing out), or you may end up the with the tank overflowing on the floor, if there is a blockage.


All it takes is a tiny snail to crawl in a 1/2" line, and get wedged in with some debris.
I usually like my outflow to sumps line to be no smaller than an inch, preferably 1.5", anything smaller is too easily plugged.

But I size my return lines small, only 1/2" or 3/4", and sometimes throttle them back to create stronger pressure, adding to surface agitation, which promotes air exchange.
 
It's difficult to tell anybody how to size Plumbing from a verbal description.

I could tell you from here that a 1 inch pipe looks fine but if you build some Rube Goldberg plumbers wet dream under your tank then all bets are off.

In theory you should increase your pipe size if you've got more than four 90-degree fittings or 360 total.

But I always want at least one size larger than that because of the snail and algae issue.
 
Do you plan to throttle each return line to equalize the pressures? That may or may not be an issue depending on the exact dimensions.
 
You must log in or register to reply here.
MonsterFishKeepers.com
Top Bottom