Our story began over forty years ago, when Westco opened a small warehouse unit in Oldham, Lancashire in 1977.

Quickly developing a reputation for friendly and efficient customer service, Westco soon launched one of its first iconic products; the Cosmos radiator valve, which was the only valve in the industry at the time to offer both wheelhead and lockshield tops.

Over the coming years, the business cemented its position as an innovator, moving with the times and introducing a continuous stream of new, sleekly designed, labour-saving items. One of our most popular product lines, the Westherm thermostatic radiator valve, has been updated many times over the decades, with the latest version, the Westherm Classic, proving just as popular and well designed as the very first Westherm, all those years ago.

In 1997 Westco acquired plumbing parts specialist, Dewhurst Distribution. The expansion of our product line and the continued success of the business led to the decision to move in 2001 to our current 57,000sq ft warehouse and distribution centre in Leigh, Greater Manchester.

We swiftly added our own state-of-the-art packaging plant for our bagged products and continued to grow; supplying over 5,500 products to more than 3,500 independent and national accounts across the UK and Northern Ireland.

Subsequently acquired by French Industrial Group COMAP in 2000, we were later procured in 2006 by Dutch industrial specialist Aalberts Industries.

In 2019, we added two new tap ranges to our extensive portfolio. Through this move, STH WESTCO became the new home for Francis Pegler, Mercia and Performa taps. We took over the selling of the established tap brands from our sister company Pegler Yorkshire, which is also part of Aalberts Industries. This product transfer ensured that the taps were exclusively available through our company in the UK.

Today, we operate under the STH (Standard HidrĂ¡ulica) name. STH is also part of Aalberts Industries. And, continuing to provide merchants, plumbers and heating installers with the products they need to service every job, our business continues to go from strength to strength.