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Hose diameters and glassware

Correctly installing Lily Pipes

Who wants to upgrade his external filter with Lily Pipes made of glass or stainless steel, can choose from a vast offering of products in our shop. In order for the filter tubes to match the respective type of external filter, attention must first be paid to a suitable hose size.

Hose diameters

transparent aquarium hose

In principle, the various manufacturers offer filters with connections for three different hose diameters: 9/12 mm, 12/16 mm and 16/22 mm. The number before the "/" designates the inner diameter of the hose, the number behind it the corresponding outer diameter. These different sizes exist because the filters and their performance are each adapted to different aquarium sizes. For example: size 9/12 mm fits the Oase FiltoSmart 60, which was designed mostly for nano aquariums. Filters with 12/16mm connection are common for medium-sized tanks, like the JBL Cristal Profi e701. Filters for even bigger tanks as for example the BioMaster line by Oase come with a 16/22 mm hose diameter.

Lily Pipe sizes

Aqua Rebell Glass Lily Pipe

Filter pipes made of glass or stainless steel are usually sold in three different sizes: 10 mm, 13 mm and 17 mm. This number designates the outer diameter of the Lily Pipe. Since the filter hose is pushed over the tube of a glass or stainless steel product, the outer diameter of the Lily Pipe must match the inner diameter of the hose. For example: a 9/12 mm hose has an inner diameter of 9 mm and a 10mm Lily Pipe. As you see, the diameters are off a millimeter. Lily Pipes of all sizes are always dimensioned a little bigger than the matching inner hose diameter. This makes the first installation a little harder but makes sure, that the hose sits tightly on the tube and doesn’t slip off. This circumstance ensures better tightness of the hose connection.


In summary, the following tubes are suitable for the respective tube sizes:

Exception: since we also offer glassware in 9 mm (not to be confused with 10 mm), a matching 8/11 mm hose is available, too. Also, the hose is so stretchy, that it fits 10mm tubes, as well.

Aquasabi Lily Pipe Set 9 mm


As already mentioned above, the initial assembly can be a little difficult, because of the slight oversizing of the tubes. We’ll give you the right tips to make this process easier.

In order to make pushing the hose on a Lily Pipe a bit smoother, you should moisten both the end of the hose and that of the pipe, for example by briefly immersing it in water.

For greater problems, especially with more rigid hoses, it helps enormously to heat up the end of the hose. Here you can prepare a heated water bath, in which you dip the hose end for a little while. After some time, the hose becomes much softer due to the heat and can now be easily slipped over the pipe. Eventually the material cools off, contracts and’ll sit tightly on the Lily Pipe. For easy disassembly of the hose connection (e.g. for cleaning purposes), you can also rely on the warm water bath method. Here the whole connection is dipped into the bath.

connect Lily Pipe with the hose

The filter hose should be slipped over the tube roundabout 1,5 to 2 cm. Significant deviations downwards will increase the risk that leaks occur (for example due to very curvy connections). A significantly longer connection is not necessary and just makes maintenance harder because it’s more of a hassle to take apart. For this reason, the hose should never be pulled over the pipe as far it could possibly go (up to e.g. a glass nub for suction cup attachment).
To remove a hose from the glassware, push the end of the hose a little further up the Lily Pipe. As a result, some moisture will get into the resulting gap. Now the hose can be removed from the filter inlet or outlet much easier.

Tips on how to properly clean glassware can be found in this article.