Roof drain A Max

Roof drain suitable for flat bitumen membrane roofs. The roof drain is equipped with a double grate that prevents the drain from clogging more effectively, allowing for a maximum water flow.

The double grate consists of a grate A and an extra screen A, which is locked to the wing nut of the fastening screw by a simple rotating mechanism. The double grate remains in place thanks to the mechanical screw fastening. The roof drain's double grate is designed for demanding applications where the risks, such as reduced water flow and water pooling on the roof, are to be minimised.

The roof drain made of acid-resistant steel withstands demanding weather conditions, temperature fluctuations and UV radiation. The roof drains made of acid-resistant steel have a primed flange.

Technical data

Model: A Max
Grate: Grate A and extra screen A
Material: Acid-resistant steel (ars)
Flange diameter ∅: 530 mm
Diameter of the collection basin ∅: 220 mm
Depth of the collection basin: 50 mm
Outlet diameter ∅: 75, 110 or 160 mm
Outlet height: 250, 300, 350, 400, 450, 475, 500, 550, 600, 700, 800, 900, 1000, 1100 or 1200 mm

Other sizes can be made to order.

Accessories

Self-adjusting thermocable (16W or 32W)

The roof drain with thermocable stays unfrozen in winter conditions. Available with 2, 3, 5, 10, 15, 20 and 25 m connection cable.

Condensation insulation (13mm cellular rubber)

Cellular rubber insulation prevents warm indoor air from entering the surface of the cold drain pipe, which prevents the accumulation of possible condensation on the surface of the pipe or drain. Temperature range -40° – +85°.

Bitumen flange

The bitumen flange provides the best possible connection between the drain and the waterproofing.

LVI-numbers

Product	LVI-nro
A Max 75/250 ars	3381308
A Max 75/300 ars	3381309
A Max 75/350 ars	3381310
A Max 75/400 ars	3381311
A Max 75/450 ars	3381312
A Max 75/500 ars	3381313
A Max 75/550 ars	3381314
A Max 75/600 ars	3381315
A Max 110/250 ars	3381316
A Max 110/300 ars	3381317
A Max 110/350 ars	3381318
A Max 110/400 ars	3381319
A Max 110/450 ars	3381320
A Max 110/475 ars	3381339
A Max 110/500 ars	3381321
A Max 110/550 ars	3381322
A Max 110/600 ars	3381323
A Max 110/700 ars	3381324
A Max 110/800 ars	3381325
A Max 110/900 ars	3381326
A Max 110/1000 ars	3381327
A Max 110/1100 ars	3381328
A Max 110/1200 ars	3381329
A Max 160/250 ars	3381330
A Max 160/300 ars	3381331
A Max 160/350 ars	3381332
A Max 160/400 ars	3381333
A Max 160/450 ars	3381334
A Max 160/500 ars	3381335
A Max 160/550 ars	3381336
A Max 160/600 ars	3381337

Documents and images

Product data sheet

Certifications and approvals

Tested in accordance with SFS-EN 1253-2.

The European standardisation organisation CEN has not defined a harmonised product standard (hEN) for roof drains, on the basis of which the product could be CE marked. The product eligibility of the roof drain is determined by site-specific certification.

Installation instructions

The roof drain is installed in a bitumen membrane roof. Read the installation instructions carefully before starting the installation work.

Maintenance and spare parts

The grates must be inspected and cleaned. Other maintenance needs in accordance with the roof service manual.

Spare parts: grate A, extra screen A

ProdLib

MagiCAD

Are the roof drains CE marked?

Roof drains are not CE marked, as the European standardisation organisation CEN has not defined a harmonised product standard (hEN) for roof drains, on the basis of which the product could be CE marked. The product eligibility of the drain is determined by site-specific certification.

How do I choose a suitable roof drain for my site?

In our roof drain range, you will find drains for every site. For a demanding site where a lot of debris accumulates on the roof or which is located in a windy place, we recommend an A or A Max roof drain with double grate.

The cost-effective roof drain C is well suited for smaller roofs or canopies.

Inverted structure drains can be found separately in our KK and PK drains.

Are your roof drains standard size?

Our roof drains have a wide range of standard sizes in terms of pipe diameter and length, for example, pipe lengths are available up to 1200 mm. All our products can also be customised to the desired dimensions on request.

What information do I need to provide when ordering roof drains?

The most important information we need about the product you want is the roof drain model, the diameter and length of the drain pipe.

How do I know how long a roof drain I need?

The roof drain outlet pipe must reach through the supporting structure, no connections should be made inside the structure. It is good to size the drain pipe so that the drain end of the pipe reaches at least 100 mm below the load-bearing structure.

How often and how should roof drains be maintained?

Roof drains must be maintained regularly. The grate must be cleaned of debris and it must be ensured that the water flow to the roof drain is unobstructed.

Do I need an scupper on the roof if the water is drained through the roof drains?

Yes, the scupper's job is to direct the water from the roof to the outside of the wall structure when the roof drain becomes blocked. Each roof, which has the roof drains, must also have at least one scupper. Water removal from small roofs and canopies can be implemented by using only scuppers.