Box Gutter Sump Regulations

Down pipe must be vertical from sump not to the side minimum sump length is 400mm.

Box gutter sump regulations. Must have a constant slope between 1 40 and 1 200. However any width can be entered. For the associated box gutter outlet. Sumps are to be appropriately sized in accordance with as nzs 3500 3 with a minimum length of 400 mm and when fitted with a high capacity overflow device with a depth of not less than 150 mm when either one or two box gutters enter the sump.

Vertical faces enter the full vertical face area. Have a minimum depth of 75mm at the high end. Sizes the depth shown of the box gutter is the depth at the upstream end. The minimum size of a sump is 400mm x 200mm minimum width of box gutter and 150mm deep.

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. This will prevent water damage in the event of gutters overflowing either due to high rainfall or a blockage. Have a minimum width of 300mm for commercial installations 200mm for domestic installations. For commercial projects the minimum allowable width is 300mm.

Box gutters must be straight no bends. Sides must be vertical. Have a sole width which is not reduced discharge at the downstream end without. State of victoria victorian building authority 2017 published june 2017.

Trial box gutter width the minimum width allowed for domestic projects is 200mm. Experiment with this figure to get the depth of box gutter you require.