Regular cleaning and unblocking of the drains gutters and scuppers is mandatory.
Roof drain cutouts for leaves and junk.
Then shorten the drain pipe and reconnect the pipe to the drain.
Drain guards are available for small round drains.
9 1 2 od base x 4 1 4 high with 3 bolt mounting holes.
To cut a square area of the roof decking away around the drain.
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The best type for the application depends on several factors such as the size and slope of the roof the desired appearance and how much regular maintenance the drain system might need.
Sizing the drains for each system including the number of drains required is based on.
A major maintenance issue shared between all types of roof drains is debris removal.
Each of these systems can become clogged by debris.
These drains are usually covered with a strainer that stops leaves and debris from getting into the drain and pipes.
The debris can accumulate in this drain basin and the water can still flow freely through the strainer.
Other than the baffle a siphonic roof drain has the same features as a traditional roof drain including a.
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Fitting similar to an upside down strainer cup the drain guard s slots allow water to flow through while blocking the leaves away from the drain s surface.
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So if a mesh of leaves forms over the drain cover it will not block water from flowing under or even through some part of the drain cover.
This air baffle is engineered and tested to prevent air from entering the piping system at peak flows.
Roof drains for flat or low slope roofs come in a few standard types.
After the roof is reconnected to the drain water can freely flow into the drain.
This may include dirt gravel leaves and other foreign materials.
A siphonic roof drain looks much like a traditional roof drain.
If appropriately designed a strainer or leaf filter is supposed to keep larger objects from going down a drain while allowing smaller debris through with the water flow most strainers or domes that cover a drain on flat roofs are poorly designed because they block smaller debris and the strainer becomes clogged preventing any water flow.
The distinguishing feature of a siphonic roof drain is the air baffle.
The water runs toward the drain down the internal pipes and then into a drainage system below the building.
It is important to keep these drains and pipes unclogged as the water will pool on the roof which can lead to leakage.