Choose an available size or any other size and enter that for the calculation of the sump.
Box gutter sump.
The outlet must be no further than the diameter of the outlet to the centre of the outlet.
Overflow devices need to discharge to the atmosphere in such a way as to prevent damage to buildings and property.
Code box gutter requirements the minimum width allowed for domestic projects is 200mm.
The minimum size of a sump is 400mm x 200mm minimum width of box gutter and 150mm deep.
For commercial projects the minimum allowable width is 300mm.
For the associated box gutter outlet.
This is a good size for the required flow.
Must have a constant slope between 1 40 and 1 200.
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.
The spigotcan also be fitted from inside the sump this allows the downpipe to be fitted up to the sump.
Box gutters must be straight no bends.
The mod tec gutta sump can be fit ted simply from within the fitted box gutter this assists the accurate locating of the sump.
Down pipe must be.
The theoretical down pipe diameter is shown for reference purposes only.