sisäputken

Sisäputki (also spelled sisäputken in the genitive form) is a term used in Finnish construction and plumbing to refer to an internal pipe or tube that is situated within another structure. The word translates literally to “inner pipe” and denotes a component that runs inside walls, ceilings, or other building elements to provide services such as water supply, heating, or ventilation.

In typical residential and commercial buildings, sisäputkisto – the network of sisäputkita – is installed during the initial construction phase. The pipes are often encased in concrete slabs or laid along timber or steel framing. Common materials for sisäputkita include PVC, CPVC, copper, steel, and laterally insulated polyethylene, depending on the service. The choice of material influences thermal efficiency, corrosion resistance, and ease of maintenance.

The primary functions of sisäputkita are to carry potable or non‑potable water, distribute heating or cooling fluids, and transport gases such as air and exhaust. In many Finnish cities, strict building codes dictate the diameter and placement of these pipes to ensure consistent pressure, prevent leaks, and allow for future upgrades without disturbing finished surfaces.

Because sisäputkita are hidden during normal use, inspection is usually carried out with specialized equipment such as CCTV cameras, infrared thermography or acoustic sensors. Maintenance work is scheduled in coordination with renovation activities, and regulations require that any modifications to the pipe network be documented and approved by local authorities.

In summary, sisäputki is a fundamental element of building infrastructure in Finland. Its proper design, installation, and maintenance are essential for the safe and efficient operation of modern building services.