agsansoo
Member
Here's my HOB overflow box and sump.
The overflow box is a weir type, the other type of HOB overflow box is called a U-tube type.The powerhead to the right of the box is used to pull air out of the overflow. Without this, the overflow could will loose it's siphon.
Here's the back of the box.
Then down into the sump.
The overflow box is a weir type, the other type of HOB overflow box is called a U-tube type.The powerhead to the right of the box is used to pull air out of the overflow. Without this, the overflow could will loose it's siphon.
Here's the back of the box.
Then down into the sump.