Extension for inlets with flange, O-ring and deep mounting housing HL85N-3020

Inlet extension – tightness and flexible installation

This element is a practical solution for extending existing inlets, allowing connection to additional sealing layers. The HL85N-3020 extension not only increases the height but also ensures a tight connection thanks to the use of an O-ring. This is particularly important in areas exposed to moisture and requiring durable leak protection.

Application and compatibility

The extension has been designed with broad compatibility in mind for popular HL inlet series. It can be used with:

• HL70, HL80, HL90 series
• HL300, HL304, HL310N, HL510N series
• HL340N, HL85N, HL85NH extensions
• HL180 drain ring

Such versatility makes the extension ideal for both new installations and the modernization of existing water drainage systems. It allows you to adjust the height of the inlet to specific installation conditions and user needs.

Construction and installation

Equipped with a deep mounting housing, the extension facilitates the subsequent installation of the HL3020 cover. Height adjustment is done by cutting off a fragment of the extension – the total height after modification is 227mm. This gives the installer great freedom in adapting the element to the specifics of the project. The O-ring provides additional connection tightness, minimizing the risk of leaks. The construction allows for quick and reliable installation without the need for specialized tools.