tigerarmy40 said:
I have a total of twelve holes drilled in the back wall and I am thinking the two inch bulk heads will be the closed loop feeds, two of the top one inch bulk heads will be for extra return and the other eight for closed loop! I am not sure if I will use two of the holes for returns since I have a return drilled through the overflow! any help would be appreciated!
One thing I would suggest is not to use any of the holes in the back as returns due to the fact that they are fairly far from the top of the tank. If you have a power outage a lot of water could potentially drain out of the main tank into the sump causing an overflow in the sump.
For your closed loop do you plan on using any kind of switching device like the OM squirt or 4/8 way?
Now as far as what would I do different and what I learned now that I am done.
Here are my plumbing suggestions.
I cut and fit every piece before I glued anything and I think this helped a lot.
Make sure you measure each piece accurately. Measure the space between the fittings and then measure how far the PVC will push into the fitting. For most 1" fittings the PVC pushes in 1 1/8" so you will need to add 2 1/4" to the measurement between the fittings. There were a couple fittings that were deeper so be sure to measure.
When you "dry" fit every piece the PVC may be to tight to push all the way into the fitting so remember to take this into account.
I would suggest maybe practicing gluing a couple pieces of PVC to get the hang of it. The first piece I did I managed to screw something up.
When you stick on a union don't forget to slide the threaded part over the PVC. I think I forgot to do this like 3 times because I got in a hurry.
Stick on some soft plumbing especially between the sump and the return pump.
One think I might have done different is to use some flexible PVC for some of my lines. I did not really find out about it until I was mostly done. I think it would have made a few parts easier.
That's about it for now. I'm sure I will think of some other mistakes/suggestions later.