Box Gutter Sump Guards

The side with the maximum flow is used to size the box gutter.

Box gutter sump guards.

Sump with a side overflow device sumps do require an increase in the depth of flow in the box gutter and gutters are to be fitted with either. 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. Box gutter slope slope should be within the range of 1 40 to 1 200.

Overflow devices need to discharge to the atmosphere in such a way as to prevent damage to buildings and property. It is usually advisable to install a sump guard protector with an overflow fitted to it so as you can also insure against foreign material flowing down the downpipes and minimizing a blockage in the downpipe or the storm water thus elevating the chances of a flow into the building of water egress. It acts as an external overflow point to reduce water surges into the stormwater system and aid the flow of water down. At this stage plan the connection to the downpipe.

The total flow is used to size the sump and overflow. 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. The side with the maximum flow is used to size the box gutter. Establish the sump location this should be the lowest point in the box gutter.

Rainheads are an essential design element for buildings where internal box or trough gutters are used. However by definition to have a sump somewhere along the gutter implies that there will be flow approaching the sump from two sides.