Box Gutter Sump Overflow

All domestic box gutters must be a minimum of 200mm wide and 75mm deep.

Box gutter sump overflow.

Box gutter sump size with vertical overflow. The side with the maximum flow is used to size the box gutter. This free online box gutter calculator will calculate the size of box gutters and sumps with a side overflow in accordance with the australian plumbing code as nzs 3500 3 2003 part 3 storm water drainage. Box gutter design to as 3500 3 2015.

A rainhead or sump is a container located between the gutter and downpipe that aids the flow of water away from the roof. The total flow is used to size the sump and overflow. The hydraulic capacity of these overflow devices must not be less than the design flow for the. If draining to a sump with a side overflow somewhere along the box gutter use this calculator.

Overflow devices consider whether the discharge of the box gutter is to. The sump depth is not necessarily measured from the bottom of the bg. Read off sump depth 175. Rainheads are an essential design element for buildings where internal box or trough gutters are used.

From before max flow 10l s. 2015 3 7 4 layout. Intersect with chosen dp choose 125 dia. Rainhead overflow or specific box gutter overflow must be at least 30mm below the height of the back of the box gutter.

It acts as an external overflow point to reduce water surges into the stormwater system and aid the flow of water down. A a rainhead b a sump with a side overflow device. Method used the method used is based on the flow chart fig 3 1 as nzs 3500 3 2003 downpipe and sump depth from fig i4 with minimum sump depth 150mm. It depends on the value of ioc.