It is easier to mark and cut the spigothole prior to fitting the sumpinto the box gutter.
Box gutter sump.
For the associated box gutter outlet.
Code box gutter requirements the minimum width allowed for domestic projects is 200mm.
Choose an available size or any other size and enter that for the calculation of the sump.
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.
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.
Sides must be vertical.
Must have a constant slope between 1 40 and 1 200.
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.
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 theoretical down pipe diameter is shown for reference purposes only.
This is a good size for the required flow.