I just set up a blumat res with an upper and a lower with overflow , but made the mistake of making the overflow from the rez the same size and it overflowed all right. The line attached to my pump is 1/2 inch. How big do I need to make the overflow for a constantly on pump? 3/4"? 1"?
Thanks.
I used 3/4" on the feed line from the pump and 1-1/4" for the return. The 3/4" wasn't necessary for the pump volume that I have, but the pipe was much more rigid and my upper reservoir is up pretty high as you can see by the picture in my earlier post. The return line is probably overkill, but you get almost 60% more area in an 1-1/4" pipe over 1" for almost the same cost.