Drilling tank

[aabiuso]

Hey I was thinking of drilling a tank I have for plumbing to a sump so I don't need an overflow box and all that ugly stuff on the back..I am jut not sure how big to drill and or how many I have a 90 gallon tank and the return pump I was planning on getting is a mag 9 if this sounds right let me know and if you can help with the size to drill I would greatly appreciate it thanks

 

[TRDfan]

I have a mag9.5 with a 1 inch drain on my current tank. I have to scale back the pump with a ball valve about 30-40%. You need a 1 1/2 inch drain for a mag9

I actually drilled my old tank for the first time about 2 weeks ago with a 1 1/2 inch diamond drill bit. It literally took about 30 seconds to drill the back on the tank. Its abit nervous @ the start, but once you move past it Its real easy

 

[aabiuso]

Okay cool thanks man...what if I was to do two 1 inch instead of the one 1 1/2 inch

 

[TRDfan]

That would be ideal

 

[aabiuso]

Okay thanks lets hope all goes well lol I'll try drilling it first on a cracked 10g I have just to learn lol

 

[TRDfan]

Nothing to it man. The hardest part is getting the bit to stay in one place @ first. You need to angle it in and once the bit has carved out a small grove, its a breaze after that

http://www.youtube.com/watch?v=C5hy6SjajQY&feature=related

Same technique minus the clay

 

[shookONES]

Drill a hole in a scrap piece if wood and clamp it to the tank. That way, the drill bit will stay in place while you get it started.