A vanity unit for vanity is a practical matter. Unfortunately, it usually doesn’t offer that much space. Because the sink drain pipes also have to find space in the cabinet. And there is no other way… Or is there? We tried installing a space-saving siphon and, of course, documented everything very diligently. So we can now show you how such a space-saving siphon can be installed. We can already reveal one thing: it’s worth it!
Usually, the siphon under the washbasin is not noticeable. But as soon as a base cabinet comes into play, a problem quickly arises. Most base cabinets have a cutout in their cover plate for precisely this purpose, so that the cabinet can be easily positioned. But the siphon takes up a lot of space inside.
If you feel disturbed by this or even want to set up a base cabinet without a recess, you have the option of installing a space-saving siphon. This is much closer to the wall and therefore offers more space under the washbasin. But how exactly can such a space-saving siphon be installed? Our instructions show you how!
Tools and materials
Only a few selected tools are required to assemble a space-saving siphon. It would be best if you had a folding rule, a ratchet with a bit set, and a pliers wrench. A miter box, hacksaw, file, and cutter are also needed to cut the pipes to length.
The most important material is, of course, the space-saving siphon itself, which is delivered disassembled. This means that the individual pipes must first be screwed together. Correspondingly, the set should also include the appropriate seals. There is also a drain socket for the wall opening and waste set for the washbasin. A little pipe lubricant can make the work much more manageable.
Install the drain fitting
The first step is to attach the drain fitting to the sink. The upper part is placed in the drain, and then the long fixing screw is inserted from above. This extends far down through the drain so that the lower part can now be screwed on the opposite side.
Now the set is correctly aligned again at the top, and then the ratchet is used. With the help of a suitable bit, the drain fitting is tightened from above – neatly, but not too tight! Finally, the ring adapter is attached to the lower thread of the set. However, the seal must not be forgotten!
Adjust the siphon
Before the space-saving siphon can be installed, it must first be adapted to the existing room situation. This applies especially to the end piece that will lead to the wall drain. This end piece is held against the connection hole as a trial and as short as possible. The required length is marked.
In our case, the end piece must be 95 mm long. It is placed in a miter box and can be cut cleanly and straight with a hacksaw along the marking. The cut edges are then carefully deburred with a file and cutter. Then everything is ready for the next, decisive step.
Mount the space-saving siphon
The first parts of the space-saving siphon can now be assembled. To do this, the drain socket is first taken and provided with pipe lubricant on the inside. Then the sleeve is inserted into the drain hole in the wall. Before continuing, the pipe end of the end piece is also moistened with lubricant.
Then everything is ready to slide the tailpipe into the wall. The pipe is placed on the socket and pushed straight into the wall. Thanks to the lubricant, this works without any significant difficulties. The end of the pipe should protrude from the wall so that the connector is pointing downwards.
Once the end piece is in place, the heart of the space-saving siphon can be fitted: the U-tube. The attachment is very simple. First, a flat gasket is placed on the thread. The U-tube can then be easily turned to the end piece. The curve of the U must, of course, point downwards at the end.
Next is the long downpipe that overcomes the route towards the washbasin. Here, too, the seal is first ensured. After the sliding ring has been pulled on, the sealing ring follows. Then the downpipe is screwed onto the U-tube. In this case, it is unnecessary to cut the downpipe as it fits in perfectly.
Connect the siphon
We have already been able to assemble the larger part of the space-saving siphon. But the connection to the washbasin is still missing. A connecting pipe must still be fitted between the downpipe and the waste set. The required length is measured with a folding rule and marked on the connecting pipe. Then the cutting takes place again.
Here, too, the miter box and hacksaw come into play. The pipe is placed appropriately in the drawer so that it can be cut straight through. As soon as the cut has been made, the cut edges are deburred as usual with a file and cutter. Then it’s almost there!
As with the other connectors, the tightness must first be ensured before each further step. The connecting piece is therefore provided with a sliding ring and seal in the already known manner. Also, a flat seal is inserted into the threaded socket on the other side of the pipe.
Once the seals are in position on both sides, the connecting pipe is attached to both the downpipe and the underside of the drain fitting. Finally, it must be checked whether the pipes are tight. So the corner valves are turned on, and the tap is opened. Lo and behold: all connections stay dry!
With that, the project would already have been mastered. It’s not particularly difficult. Practically anyone can install a space-saving siphon. In the end, it just comes down to working carefully and not forgetting any seals. Then nothing can go wrong. And the space savings through the space-saving chip can be seen. That’s how it should be!