LK Armatur in Great Britain

LK Armatur and Certatherm, working together

Good heating systems start with dependable components and the right expertise. Together with our distribution partner Certatherm, we support heating merchants and installers across Great Britain with LK Armatur products, local knowledge and technical guidance.

Two companies with a shared approach

LK Armatur

We are a Swedish, family-owned manufacturer of valves, controls and prefabricated units for heating and cooling systems. Since 1985, we have developed and manufactured products for the HVAC industry. With development and production at our headquarters in Helsingborg, we bring engineering expertise and manufacturing experience to the partnership.

Certatherm

Certatherm is our distribution partner in Great Britain. Its team draws on more than 20 years of experience in heating distribution, system design, technical consultancy and installer support. Established relationships with specialist heating merchants and knowledge of the British market complement our product range and engineering expertise.

Visit Certatherm →

Supporting merchants and installers

For heating merchants

We are working with Certatherm to support our existing stockists and develop new partnerships with specialist heating merchants across Great Britain. Together, we aim to help you build your LK Armatur business through product knowledge, technical guidance and local sales support.

For installers

Certatherm is your local point of contact for product advice and technical questions about our range. Its team's experience in heating system design and installer support can help you select suitable components and understand how to use them in your installation.

Do it once. Do it right.

An unexpected return to site takes time away from the next job. Together with Certatherm, we focus on dependable components and practical support to help installers make informed product choices and get the details right.

Aventus Eco uses our components in its heat pump installations in Scotland. Owner Sean Hogan describes his experience:

Certatherm have been absolutely brilliant, always at the end of the phone if we've needed anything. Having that level of support, along with a product that just does what it's supposed to do, makes a massive difference to us as installers.

Sean Hogan, Owner, Aventus Eco

A selection of our products

Explore a selection of our products for heating, cooling and domestic water systems. Visit each product page for available variants, technical information and installation documentation.

LK 525 MultiZone 3W

Reliable zone control made simple. This motorised 3-way valve actuates quickly without sticking and switches flows smoothly, preventing seasonal start-up problems and reducing the need for service visits.

More info
LK 556 AntiFreeze

No more frozen surprises. This automatic valve empties the system below 3 °C, then resets itself as soon as flow returns – total peace of mind.

More info
LK HydronicGroup

Boost efficiency and save time. These pre-assembled pump groups can combine pump, insulation, and controls in one compact unit for heating or cooling, ready to install – quick and easy.

More info
LK 551 HydroMix

Safe hot water every time. Thermostatic mixing valve with anti-scald protection ensures stable temperatures and simple adjustment for reliable performance.

More info
LK 521 MultiFill®

Easy filling, safe systems. This compact valve filters grit, prevents icing, and installs even in tight spots – keeping heating systems protected and making setup quick and hassle-free.

More info
LK SmartComfort

Smart control made simple. This electronic controller displays valve status clearly, and allows quick push-button adjustments for reliable, accurate temperature control.

More info
LK 525 MultiZone 2W

Hassle-free zone control. This motorised 2-way valve actuates quickly and doesn't stick, preventing downtime and avoiding start-up issues at the beginning of the heating season.

More info