well i made it this far... for the past few days i've been making RODI. and as of last night i finally filled the whole system with water. I primed my 'u'tube on my overflow and started the return pump...
it works.
then one minute later, i reallized it works too well...
the problem(s);
at first i thought the return pump was way too fast for the overflow, luckily i have the ability to return some of the water to the sump, so i opened the valve to allow some water back into the sump... the overflow is still desperatly trying to keep up... and its sucking alot of air, gurgling, making noise & bubbles all over the sump & fuge...
after alot of tinkering with the valve that returns water to the sump i figured out that the problem is not with the pump working too well... the problem is that the overflow is trying to drain too fast and it cant keep up (even if i only 'trickle the water back up to the DT from the return...
so on a hunch i closed the valve on the supply line a little at a time untill it stopped running too fast... it worked perfectly to get rid of the gurgling, bubbles & noise.... this is when i realized my supply plumbing works too fast for the drain pipe in the overflow...
the dilemma;
in order for the system to work i need to return about 1/2 the water from the return-pump back to the sump, and close the valve on the supply line (coming from the overflow) about a 1/3...
this really inhibits the full capacity of the system... it was really my hope to obtain as much gph from this system as possible. (i calculated around 600) This scenario cuts the gph almost in half (roughly 350)
possible solutions; (here's where i'm hoping to hear from some of the experts)
1. i'll try to add a second 'u' tube to the overflow to try to increase the water going from the tank into the overflow.
if that doesn't work,
2. i'll build a stand pipe to try to keep air out of the supply pipe.
if that doesn't work,
3. i'll try both together. the new stand pipe + a second 'u' tube.
any suggestions would rock...
i'm going to go try to research how to build a 'straght' standpipe b/c i dont have room in the overflow for a 'durso' stand pipe...