What is the actual length and purpose of the BILKA 3 m downpipe?

The official BILKA catalog specifies 3000 mm for the main downpipe. It directs water vertically from the funnel and elbows to the final outlet or drainage. The product in Shopify has 90 and 100 mm variants but is not universal for every gutter system: 90 mm pairs with a 125 mm gutter, and 100 mm with a 150 mm gutter. The actual facade height determines the number of full pipes and necessary intermediate connections.

When should I choose a 90 mm downpipe and when a 100 mm one for a 3 m length?

The 90 mm pipe is used in the 125/90 system, which BILKA recommends as the general minimum choice for an area up to 100 m² per downpipe. The 100 mm pipe belongs to the 150/100 system for larger areas or higher water flow. The boundary is approximate: long gutters, few downpipes, and heavy rainfall may require a larger diameter. A 90 mm pipe should not be connected to 150 mm gutter elements, nor a 100 mm pipe to 125 mm.

How many finishes and SKUs does the BILKA 3 m downpipe have?

Shopify contains 36 variants of the pipe: 18 each for diameters 90 and 100 mm. For both sizes, there are matte, glossy, and “Zinc” labeled options. For example, 90 mm / Matte / RAL 8017 is SKU LT-1729, and 100 mm / Zinc is LT-1761. Matte variants come in five colors per diameter, glossy in twelve, and unpainted in one. The request specifies diameter, finish, color, and SKU.

At what distance is the BILKA 3 m downpipe fixed to the wall?

BILKA specifies a maximum of 2 m between wall brackets. The first bracket is placed immediately 150 mm below the elbow, and the last one just before the final outlet. For a 3 m pipe, this usually means more than two points depending on the placement of elbows and joints, but the exact number is determined on the facade. Brackets are aligned vertically, and on insulated walls, anchors of appropriate length are used.

How are the 3-meter BILKA downpipes calculated for a facade 7 m high?

For a 7 m vertical run, two 3 m pipes are not enough, so an additional 1-meter intermediate element or adjusted solution is planned, plus the lengths of the upper elbows and final outlet. Measurement is taken from the funnel outlet to the drainage point, not just the wall height. The number is determined separately for each downpipe, including connectors and bracket locations. Cutting is done with a cold tool, not a grinder.

Where should the BILKA 3 m downpipe end?

At the bottom end, a system outlet is installed to direct water away from the facade and foundations, or a suitable flange connection to the sewer. BILKA explicitly describes both options. The pipe should not simply end at the wall where water can wet the plinth. The last bracket is placed before the drainage element. The flow direction, ground level, inspection chamber, and frost protection are specified for each project.