To assemble a toilet


The installation of a toilet is one of the work that home improvement can even perform without too much effort. Nevertheless, even when installing the toilet basic knowledge is required so that the installation is professional. Below, we have put together a guide for installing a toilet for you.

Toilets and the various flushing systems

We use them every day and somehow they are always the same for us - the toilets. The differences are most likely still perceived in the cistern. Just think of the cistern in the old building, which hangs on the ceiling at the top and can be operated with a chain that is pulled - or in contrast, the modern flush, which is no longer visible. So there are different types of toilets:

  • hanging toilet for pretext installation
  • hanging toilet for the back wall mounting
  • Floor-standing WC for attachable cistern
  • Free standing WC for flushing water pipe connection

Hanging toilets

In the hanging toilet for the front wall mounting, the mounting form refers to the cistern. The is attached to the toilet on the toilet or hanging high on the wall. However, this technique is rather rare to find. Mainly hanging hanging wall mounted toilets are enjoying great popularity.

For this toilet, a porch element must be attached to the wall and tiled. Since it is the common system for the hanging toilet, we have put together a corresponding manual for mounting the front element under "Wall-mounted toilet".

The stand WC

The installation of wall-mounted toilets is today's usual form of assembly, as it is also connected to a wall drain. Although there are also stand-up toilets with wall drain, however, the floor drain is typical here. The floor drain, in turn, is mainly found in old buildings. So before you begin to install the toilet, make sure you have the correct toilet system.

Step-by-step instructions for installing a toilet

  • Toilet (pay attention to the execution!)
  • if necessary wall porch element
  • if necessary, construction or structural cistern
  • Angle valve (if missing or defective)
  • Drainpipe for attachment to toilet
  • possibly HT-bend for the drainpipe
  • lubricant
  • hemp
  • Soundproofing mat (wall systems)
  • Toilet glasses (toilet lid with glasses)
  • Pusher plate (with wall pre-construction element)
  • odor plug
  • Assembly and fastening material
  • if necessary, silicone joint
  • Wall tiles (porch element)
  • Tile adhesive (stem element)
  • Wire flex hose from angle valve to cistern
  • Wrench set (preferably fork / ring)
  • Foxtail or other fine-toothed saw
  • Wasserpumpenzange
  • screwdriver
  • possibly a drill with a tile or stone drill
  • Maurer pencil
  • Meterstab
  • spirit level
  • Tile laying tool (when mounting a stem element)

1. Preparations, installation of the stem element

Below we describe the installation of the toilet. The installation of the front element for a back wall flushing in a hanging toilet is described here: Mount the wall WC.

2. When renovating the toilet

Turn off the water at the angle valve, then empty the cistern. If it is a cistern placed on the toilet, you will find the screws underneath the toilet. Modern systems are plastic screws that you can easily loosen with a water pump pliers.

Now you can remove the cistern and loosen the floor screws or wall screws of the toilet. Then pull it in the opposite direction to the drainpipe.

It may be that you need to clean the drainpipe. In particular, if a lot of urine has accumulated, this unpleasant work is unfortunately necessary. You can find help under toilet clogged, what to do.

3. Mount a new toilet

a) Install the cistern on the toilet

First, the cistern is placed on the toilet. Attach the enclosed rubber sealing collar to the pipe connection between cistern and WC. Then the screws from the cistern (inside) to the outside (bottom) pushed through. Now you can attach the cistern with the appropriate plastic screws.

b) Insert drainpipe

Now the drainpipe is measured in length. Position the toilet as it should be later. Be sure to measure the drain pipe long enough to reach far enough into the drain hole. Now the rosette (usually for screwing) is put on. The drainpipe can now be plugged into the wall drain.

c) fix the toilet

After the toilet has already been set up, as it should later be installed, immediately mark the holes (floor or wall). Then drill the holes. Especially with tiles and porcelain stoneware you have to pay attention to the right tool choice. Under Fine stoneware and tile drilling you will find detailed information.

Insert the dowels into the holes and push the toilet into the correct position. Keep an eye on the drainpipe so that it also slips easily onto the pipe connection of the toilet. Now fix the toilet.

d) Final assembly of the toilet

Now the sleeve is screwed to the drainage pipe with the toilet connection. From the angle valve to the cistern water connection, screw the wire flex line. Finally, you can now mount the toilet lid.

Tips & Tricks

As a rule, the manufacturers of toilet and cistern supply appropriate installation instructions. Please do not forget to wrap tubes and compounds with hemp according to the respective requirements or to apply the lubricant.

If you previously had very lime-laden water from the public water supply, we recommend installing a rinsing system with rainwater. Because the lime in the water reacts chemically to urine, it forms a corresponding amount of urine stone. Rainwater, on the other hand, is completely lime-free. It can never arise urine stone.


Video Board: How to Assemble a New Toilet