How is overflow system different from ... ?

[Yusuf]

How is overflow system is different from simple suction water from a tank ? you have to suck air in 2 situations ..

 

[boehm742]

This is the best, most easy to understand piece on sumps and overflows I have found anywhere. It also has a working model so you can see how it all fits together.
Melevsreef.com | Acrylic Sumps & Refugiums

Marc explains it all quite well.

I suggest you read this link azdesertrat provided in your other thread on this same subject of overflows.

 

[Yusuf]

I suggest you read this link azdesertrat provided in your other thread on this same subject of overflows.

Just saw it thanks :)