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  • LK Systems

    LK Systems is the leading manufacturer of easy-to-install systems for heating and tap water distribution and pre-insulated pipes in the Nordics. Through our prefabrication factory, we also provide tailor-made solutions that simplify the installation process even further. Svenska English Norsk Suomi

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    Our PEX Pipe Extrusion business area is an innovative manufacturer of high-quality plastic pipes for the heating and plumbing industry. Our core is the efficient, high-technology production process for crosslinked PE-Xa pipes, resulting in products with a unique combination of flexibility and hydrostatic strength. English

  • LK Group

    LK is a family-owned trading and production group, operating on a global scale within the HVAC-area. We are the market leader in Sweden and has an increasing sales of products, systems and solutions in the Nordic countries, Europe and the USA. Svenska English

27 January, 2026

LK Frame/Hatch Slim PRESEAL UNI

Makes installation easy when installation depth is limited!

LK-FrameHatch-Slim-PRESEAL-UNI-wet-zone-hatch-prefabricated-membrane-flange

LK Frame/Hatch Slim PRESEAL UNI is a wet zone solution for installations with limited installation depth and high waterproofing requirements. The design includes a 50 mm-wide flange onto which the prefabricated 50 mm membrane flange is mounted, reducing unwanted moisture ingress and helping to minimise the risk of water damage.


Approved for wet zones, but not for areas intended for baths or showers.
  • New products,
  • Tap Water

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LK Frame/Hatch Slim PRESEAL UNI

LK Frame/Hatch Slim PRESEAL UNI features a 50 mm-wide flange onto which the prefabricated 50 mm membrane flange is mounted. It has been tested and approved for installation in wet zones, however not in areas intended for baths or showers. The current list of system-approved waterproofing systems and the installation instructions for connecting the waterproofing layer to LK Frame/Hatch Slim PRESEAL UNI for each brand are provided in the installation instructions. There is no test method for connecting a membrane flange to vinyl sheet flooring, and therefore no adapted products are available on the market. LK Frame/Hatch Slim PRESEAL UNI is not intended for installation with vinyl sheet flooring as the surface layer. LK Frame/Hatch Slim PRESEAL UNI requires a free installation depth of only 12 mm, measured from the outside of the wet-room board to the front edge of the LK Manifold Cabinet or another installation, e.g. LK Shaft Base SECURE. If two wet zone hatches are installed side by side, LK recommends at least 150 mm between the cabinets. If the wet zone hatch is installed close to a corner, a minimum distance of 100 mm to the cabinet is recommended. A table with cut-out dimensions is provided in the installation instructions. LK Frame/Hatch Slim PRESEAL UNI can be mounted to a manifold cabinet or in the building structure. Accessories for both installation methods are included. The frame towards the surface layer has a fixed dimension of 17 mm, which the wall material must be adapted to. LK Frame/Hatch Slim PRESEAL UNI is supplied with a sealed exterior hatch in white-lacquered sheet metal, colour RAL 9016, pre-installed. The product must be stored in a temperature-controlled, frost-free environment.

LK Wet zone hatch PRESEAL UNI

LK Wet zone hatch PRESEAL UNI has a 60 mm-wide flange onto which the prefabricated 50 mm-wide foil flange is mounted. It has been tested and approved for installation in wet zones, however not in locations intended for baths or showers. A current list of system-approved waterproofing layer brands, as well as installation instructions for connecting the waterproofing layer to LK Wet zone hatch PRESEAL UNI for each brand, is provided in the installation instructions. There is no test method for connecting foil flanges to vinyl wall covering, and therefore no adapted products are available on the market. LK Wet zone hatch PRESEAL UNI is not intended for installation with vinyl wall covering as the surface layer. LK Wet zone hatch PRESEAL UNI requires a free installation depth of at least 65 mm, measured from the outside of the wet-room board to the front edge of the LK Manifold Cabinet or another installation, e.g. LK Shaft Base SECURE. If two wet zone hatches are installed side by side, LK recommends at least 150 mm between the cabinets. If the wet zone hatch is installed close to a corner, a minimum distance of 100 mm to the cabinet is recommended. A table with cut-out dimensions is provided in the installation instructions. LK Wet zone hatch PRESEAL UNI can be mounted to a manifold cabinet or in the building structure. Accessories for both installation methods are included. The outer frame can be adjusted between 3–13 mm so that the frame is flush with the wall surface. LK Wet zone hatch PRESEAL UNI must be supplemented with LK Tileable Design PRESEAL (a hatch that can be tiled) or LK Standard Design PRESEAL (a white-lacquered sheet metal hatch). Parts fixed to the wall are made of stainless steel; other parts are made of galvanized sheet steel, white colour RAL 9016. The product must be stored in a temperate, frost-free environment.