From a carpentry workshop to a global player


Over 100 years of expertise: building a bridge from a successful past to a sustainable future

Better Living Environments

Uponor’s story began in 1918, when Aukusti Asko-Avonius established a carpentry workshop in Lahti, Finland. The workshop quickly grew into the largest furniture supplier in the Nordic countries. In the 1960’s, the company expanded its business further into the plastics industry.

Today, we are building a bridge from a successful past to a sustainable future. With the same innovative spirit that brought next-generation alternatives to concrete, iron and copper as piping materials, we are moving forward into ever-more intelligent solutions. With a focus on sustainability, we promote innovation in energy saving and smarter water usage for the benefit of our customers and the world we live in.


Aukusti Asko-Avonius establishes a carpentry workshop in Lahti, Finland.


A new company, Upo Oy was established to manufacture cast iron products and household applicances.

Arvi Tammivuori, son of Asko-Avonius, establishes Upo Oy and begins to manufacture cast iron products and household appliances.


With the production of cast iron pipes, sewer pipes become a whole new product group for Upo.


The first plastic factory, Upo-Muovi, starts up in Nastola, Finland, and launches its first plastic pipes and fittings.


First in world, Wirsbo in Sweden starts to manufacture the unique and innovative PEX pipe for heating and plumbing applications.


Asko and Neste establish Oy Uponor Ab.


Uponor introduces the unique structured wall pipe construction called Ultra Rib.


Uponor enters the plastic hot water pipe business by acquiring the German company Hewing and the Swedish company Wirsbo.


The first overlapped welded multi-layer composite pipe (MLCP) is invented and patented by Uponor.


Wirsbo opens a factory in Apple Valley, Minnesota, USA.


The world’s first press fitting for MLCP is launched.


Uponor launches the unique and revolutionary Quick & Easy fitting system.

1997 - 2006

  • During 1999 Uponor acquires the German company Unicor, and becomes a leader in multi-layer composite pipe.

  • Uponor merges with parent company Asko Corporation, renamed Uponor Corporation on 1 January 2000.

  • 2006: Uponor consolidates all businesses under one brand.


Through a merger with KWH Pipe on 1 July 2013, Uponor Infra is established.


UWater, a start-up company that specialises in water quality monitoring, is acquired in addition to KaMo and Delta.


Uponor and Belkin International Inc. establish the joint venture Phyn.

Phyn develops water-sensing and conservation technology both for consumers and the building industry.

Uponor acquires KaMo and Delta in Germany and expands its competence in drinking water hygiene.


Uponor acquires a new manufacturing site in Hutchinson, Minnesota, to meet continued strong growth in the USA.


Uponor celebrates its 100-year anniversary.


With its new bio-based PEX Pipe Blue line, Uponor features an up to 90% lower product carbon footprint compared to fossil-based PEX pipes on the market.

 The history of Uponor

The history of Uponor

In celebration of 90 years in business, Uponor published in September 2008 a book conveying its story from 1918 to 2008.