Drilling Oceanic 37

trcons · 09-20-2005, 04:06 PM

I have an Oceanic 37 which is drilled in the upper right hand corner. I want to drill one more return in the upper left, and at least intakes for a closed loop. I would put the closed loop intakes in the middle say 10" down from the top and 8 or so from the sides. As if that's no enough holes, I would like to put 2 3/4" returns in as well. Can this be done?

Tom

GranTurismo Racer · 09-20-2005, 04:53 PM

yep it can be done. i just had superman drill my 150. but you should keep the # of holes to a minimum. i only have 2 inputts and no returns. i just have my returns go over the top of the tank and down. the reason for the least amount of holes the better is that the more holes you have the weeker your tank gets. you should just drill 1 more for inputt. thats all you should need.

David Grigor · 09-20-2005, 05:08 PM

The downsize to going over the top with the return is that your creating head pressure. If everything is below the waterline then your just pushing water with no pressure you are maximizing the throughput. Plus it is the cleanest looking when you use those spa nozzles that are built into the bulkhead.

Providing your returns are in the upper portion of the tank where the amount of water pressure is the lowest, You should be fine. If you were to add that many holes in the lower portion then it could become a concern.

trcons · 09-20-2005, 05:26 PM

Hmmmm. I'm not sure I'm following you David. Are you saying I could run 6 holes across the top? 4x1" (2 returns 2 closed loop intakes) and 2 3/4 returns?

Tom

David Grigor · 09-20-2005, 05:46 PM

I thought you said the intake would be 10" or so down.

If all your returns are in the upper portion of the tank you should be fine.

I would only have 1 return from the sump to cut down on the holes instead of two.

trcons · 09-20-2005, 06:56 PM

How about this.

O o o O

O O

O= 1"
o= 3/4"

Top 2 1" are drains to sump
Bottom 2 1" are intakes for closed loop
Top 2 3/4" are returns from closed loop

Is this doable?

Tom

Loverotties · 09-20-2005, 06:57 PM

Shure it can!

trcons · 09-20-2005, 06:57 PM

well that didn't work

-----O----------------o------------------o-----------------O

--------------O-------------------------------------O

how about this

JnS · 09-20-2005, 09:45 PM

that should work fine.

Superman · 09-20-2005, 11:56 PM

Bring drill bits on Saturday and I'll drill it up for you.

trodder · 09-21-2005, 12:02 PM

I think it would work great!

Lars · 05-30-2006, 06:14 PM

Bringing this thread back from the dead!

Hey Trodder/Superman,

Were you able to drill the Oceanic 37gal? I have one (the "cube" kind) that I want to drill but I am afraid that it is tempered. Also, your illustration with 6 holes seemed like way overkill for a 37gal. How did it turn out? What return pump and CL pumps did you use?

Lars.