Decided to drill my tank

[Easto]

None of my panels are tempered, which is nice !

[CM125]

highly recommend Herbie, make sure you research before drilling though!

[Easto]

I've been looking into it.

I would be drilling the back of the tank.

I am just not too sure why the siphon drain in a lot of the pictures I have seen have a 90 degree fitting pointing down.







I don't understand why that is needed and how do you purge all the air at the start to begin the siphon.

[target]

With the 90 pointed down you get a full flow syphon as the pipe will begin to draw water once the level in the overflow raises high enough. The water falling pulls the air with it, and purges the air that way. A small air bubble will be left at the top of the piping but most of the air will be purged.

[Doug]

Many of the online stores sell packages, matching the bulkheads to the hole saw.

[CM125]

its pointed down to get the siphon lower in the chamber, its not needed, but helps a bit with the restart.

[Easto]

Would something like that second picture be fine?

I was looking at a 6 ¼”W x 4”D x 5”T Overflow box.

How much space should I have between the bottom of the box and the opening of the siphon intake?