Sumps are usually attached between a box gutter and the downpipe.
Box gutter sump.
How much fall should i have on a box gutter.
For commercial projects the minimum allowable width is 300mm.
A good box gutter design will have falls along its length together with sumps to collect water before it is fed into large downpipes.
A box gutter is given its name as it is usually boxed into the middle or edge of the roof.
Sides must be vertical.
This ensures that there is no blockage of any kind meaning that all of your roofing accessories can function at their optimal level.
A box gutter is defined as a graded channel generally of a rectangular shape for the conveyance of rainwater within the building footprint including adjacent to a wall or parapet.
Must have a constant slope between 1 40 and 1 200.
The spigotcan also be fitted from inside the sump this allows the downpipe to be fitted up to the sump.
The theoretical down pipe diameter is shown for reference purposes only.
Down pipe must be.
The depth shown of the box gutter is the depth at the upstream end.
It is easier to mark and cut the spigothole prior to fitting the sumpinto the box gutter.
Choose an available size or any other size and enter that for the calculation of the sump.
Code box gutter requirements the minimum width allowed for domestic projects is 200mm.
For the associated box gutter outlet.
A rainwater sump catches any debris or unwanted materials from travelling down the drain pipe and into any drains.
Box gutters are deemed to satisfy the performance requirements of the national construction code if they are certified to meet.
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.
Sumps can be made to order but are commonly manufactured in either 100mm and 150mm depths.
The mod tec gutta sump can be fit ted simply from within the fitted box gutter this assists the accurate locating of the sump.
The outlet must be no further than the diameter of the outlet to the centre of the outlet.
This is a good size for the required flow.
Typically a box gutter is trapped between two roofs that feed rainwater into it.
Box gutters must be straight no bends.
They collect storm water before it is carried away by the downpipe and they also serve to catch any debris before it enters the downpipe.
Overflow devices need to discharge to the atmosphere in such a way as to prevent damage to buildings and property.
Box gutters should have a minimum fall of 1.
The minimum size of a sump is 400mm x 200mm minimum width of box gutter and 150mm deep.
The gutter collects the water and disposes of it through the drainpipe.
