[mbike1]

Hi all I need to know what hole size I need to drill a 75 gal for a overflow. 1' 3/4"??? What size would give me the most plumbing options.

THX,

Josh

 

[lightngsvt]

What size bulkhead do you plan to use?

 

[omarizgreat]

how much water flow are you looking for.

 

[mbike1]

I'm using a a Mag 9 as my main system pump and at head height i'm at something like 800gph. I'd like to put in more than I need as I would like to use more system pump for my circulation and have less aux pwr heads. Does 1" sound like it will be enough? 1" = 1.75" bulkhead hole size correct?

 

[RJLAMIE]

When you are first setting up a tank it is far easier to drill 2 holes for sump returns and not really use the full potential of either. Normally 1" drain are rated for 600gph each. I have found that I can consitantly push 1000gph through mine with a durso standpipe. If I were to do it again I would put in 2 and have to throttle it back a little rather than change your mind later and want a extra one. I would also use 1" because of all of the parts that are available for it which is a 1.75" hole.

Good Luck Randy

 

[mbike1]

Thanks everyone for the advice looks like I'll go with 1" and maybe get one in each corner for more potential later on.