It is easier to mark and cut the spigothole prior to fitting the sumpinto the box gutter.
Box gutter sump.
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 spigotcan also be fitted from inside the sump this allows the downpipe to be fitted up to the sump.
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.
Must have a constant slope between 1 40 and 1 200.
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.
Sides must be vertical.
For the associated box gutter outlet.
The depth shown of the box gutter is the depth at the upstream end.
Down pipe must be.
This is a good size for the required flow.
The minimum size of a sump is 400mm x 200mm minimum width of box gutter and 150mm deep.
Box gutters must be straight no bends.