Combi works

No. 1 manhole cover supplier in Finland and Estonia

Combi works

is the market leader

We are a preferred supplier and distributor of manhole covers, telescopic pipes, jaw frame gullies and surface boxes on the Northern European market. We supply products in Finland, Estonia, Sweden, Latvia and Lithuania.

We are local and near you and take pride in helping build sustainable infrastructure. Our communities and people are close to our hearts – lasting and sustainable infra can help secure our communities.

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Combi works

Products for demanding needs

Combi Works offers different service levels to meet different customer needs, we have it all from shipping a container of manhole covers to a customer’s yard to delivering individual telescope sets directly to a construction site. Combi Works has a broad range of different products for various installations and can also customize the existing products by the customer wishes or develop totally new designs.

Combi Works designs, manufactures and markets cast iron products based on the needs of the local market. Designing products, we follow the valid standard EN124 parts 1 and 2, 2015. The selection of the range is engineered for the intended use and made of the most suitable materials. Our product range is unique – we offer 3 different versions – Optimized, Normal and Heavy, in addition to special series according to the conditions of water companies or municipalities.

From our product range you can find Circular covers with diameter from 160mm to 900mm, squared frames with squared or circular covers, surface boxes with W (water) or G (gas) marking or neutral, small and large jaw frames and most of the products we provide with telescope pipes with different ring stiffness (SN1 or SN2).


We provide clear and safe castings for different environments. Right casting in the right area of use.

Ductile, spheroidal graphite cast iron is a type of graphite-rich iron which has much more impact and fatigue resistance, due to its nodular graphite inclusions

Grey, flake graphite cast iron is a type of cast iron that has a graphitic mictrostructure.



Ease of Machining

Vibration Damping

Surface Hardenability

Modulus of Elasticity

Impact Resistance

Corrosion Resistance

Strength / Weight

Wear Resistance

Cost of Manufacture

Production quality

Product design, manufacturing and testing based on EN124-2 and local market needs and requirements.

Local product control before shipping to customers.

Strength analysis and simulations during the R&D phase.

Feedback from customers and users for improvements

Quality control in foundries according ISO9001 incl. load tests.

All 100% traceable with revision follow up and Claim-NC-CAPA process history

Finished products inspection by our own specialist and/or 3-party before shipping from foundry.

Certification of foundries in accordance with ISO 18001 & 14001

Combi works

Latest blog posts

Combi Works is listed as one of the leading European circular solutions pioneers

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Making Your Purchasing Smarter: A Simple Guide to Growing Your Business

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Combi Works acquires AluFix safety railings

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Introducing MultiV+: A Game-Changer in Drainage Solutions

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