Where to drill tank?

[Silverni2]

I'm drilling a 120 tank 4 holes 2 returns 2 drains. My question is can they be drilled on the sides ? 2 on each side instead of on the back? Is there a downside to this?
Thanks

 

[rkaragozler]

what is the depth of the tank?

 

[Silverni2]

48x 24x 24 I would like to drill 2 on each side and put an mp 40 on back wall in the middle of the tank? Each hole would be as high up ad possible?

 

[rkaragozler]

IMO i wouldn't drill 2 holes on each end, the glass is really narrow, if you were to go with a 1" bulk head which requires a 1 5/8" -2 1/8" hole, and a 3/4" bulkhead for return which requires a 1 3/8" - 1 1/2". this will make the side glass very brittle.

 

[duke62]

yeah when you drill the tank even though its a round hole you compromise the glass.if anyone or anything bangs into it its a disaster

 

[Silverni2]

Thx guys, I guess I'll spread the 4 holes evenly across the back glass as high up as I can.

 

[rkaragozler]

remember no less than 2" off the top

 

[Silverni2]

remember no less than 2" off the top

Hey I just have 1 more question about drilling my 120 you had suggested I not drill sides, I'd be better off drilling the back 48 x 24 x 24. My issue is the tank is in a closet on it's stand with a window cut out, I work on the tank from the back which would expose those bulkheads to abuse. If I drill the sides they are in a much safer place. My question is where is the best place to drill holes on the sides, I know you said go atleast 2" down but how about the distance from front and back glass?
Thanks alot

 

[mluz]

2" from all sides should be the minimum.

 

[rkaragozler]

2" from all sides should be the minimum.

+1