Buying your own roof drains will save you shipping costs.
Roof sump overflow.
But stranger things have happened.
21500 q91 roof drain.
Green roof type with internal polypropylene dome.
Unless the roof drains are lower than the surrounding roof they will not drain resulting in huge pools of water.
Roof drain sump pans prevent eliminate standing rainwater on your flat roof.
R1200 eu large sump roof drain with adjustable extension.
Green roof drain overflow drain large sump flange.
You can buy roof drain kits pan and roof drain or just the sump pans only and provide your own roof drains.
R1200 buv large sump roof drain with fixed extension sump receiver and deck clamp.
21500 rdg2 roof drain.
The sump however will be a bit unusual being at the end with a vertical overflow.
They will sump the primary and overflow roof drains.
Green roof type with stainless steel secured cover.
R1150 spec combined small sump roof and secondary overflow system with loose set sump receiver.
Each roof drain sump pan has it s own purpose.
21500 rdg1 roof drain.
There are many different ways to create roof sumps as the following pictures show.
R1200 large sump roof drain.
Roof drain pans are a fast easy and cost effective solution.
21500 rdg3 roof drain.
As the two above photos show with two drains that the overflow drain can easily become a ponding problem also.
Green roof type with perforated standpipe.
If you are using two drains for your roof drainage the possibility of drains being installed at the wrong elevation doubles.