Noisy and leaky pipes are not something you have to live with. Any homeowner with basic skills and tools can change a bathroom and upgrade to a new water-saving design.

Installing a new bathroom will take a few hours, but the reward will last for years.

Tools and materials

  • Spatula
  • Adjustable key
  • Screwdriver
  • Spare bathroom
  • Wax ring
  • Sanitary screws
  • Silicone caulking compound

How to measure for a new bathroom

Make sure that the new bathroom fits in place of the old one.

Measure from the wall behind the toilet to the center of one of the adjustment screws (the screws that secure the toilet to the floor). Do this before removing the old bathroom so you can buy a new one and have it on hand before you start. If the toilet has four adjustment screws, measure to the center of one of the bottoms.

In addition, measure from the center of the mounting holes to the back of the new toilet you have chosen. Compare these two measures. If the base of the new toilet bowl is shorter than the distance between the rear screw holes and the wall, it must fit.

In small bathrooms, where space is limited, also measure from the sides of the flange bolts to the side walls or other objects to ensure that there is space between the sides. You don’t want to find out, after you start, that you can’t put the new toilet in place because it’s trying to occupy some of the same space as your sink.

How to buy the bathroom

Unless you buy one of the new one-piece models, you will have to buy the glass and the tank. They will come in two separate boxes. Virtually any tank you buy will have the flush valve assembly installed, but it wouldn’t hurt to have a look too.

In addition, you will need new adjustment screws, a wax seal and a toilet seat, if they are not included. If you are thinking of replacing the supply line, the flexible ones are lined with stainless steel mesh and are resistant, attractive and very practical. Cheaper plastic supply lines are also available, in case you are concerned about the price.

How to remove the old bathroom

If you want to remove a toilet bowl for a change, it will be better for your back, floor and walls if you remove it in pieces. Even if you remove the toilet, don’t break it.

  • Turn off the water supply to the bathroom. There should be a valve near the tank that extends from the base of the wall or the floor.
  • Flush and remove the rest of the water from the tank and bowl with a small glass and a sponge.
  • If you plan to reuse the supply line, disconnect it from the bowl. If you plan to replace the supply line, remove it from the supply valve and leave it hooked in the bowl.
  • Remove the tank cap and place it on the floor, far away so as not to interrupt, or better, in another room. Do not lean this fragile part against the wall near your workplace. If it falls or is hit while trying to move the heavy parts of the toilet, it will likely break.
  • Remove the tank from the bowl. It will be attached by a pair of screws near the center of the bowl, where it finds the tank. These screws pass from inside the tank through the mounting flange at the back of the bowl. Simply remove the nuts and remove the cup from the gasket. If the screws are rusted and the nuts are difficult to unscrew, wet the screw assemblies for a few minutes with a little lubricant. Place the tank in the most distant place possible, if it is better outside the home.
  • Remove the screw caps from the base of the toilet bowl and remove the adjustment screws. Some bathrooms have four adjustment screws that secure them to the floor. Most will only have two.
  • Shake the cup to remove the wax seal. Unless you want to take the mug straight out, have a piece of paper or plastic ready to put it on. The gasket will become dirty and sticky, and the gasket wax is a difficult material to clean from any surface.
  • Plug the drain hole to prevent gases from escaping into the room. Make sure that the plug (cloth or other) does not fall into the drain and clogs.
  • Use a flexible trowel to sand the wax or putty from the base of the bowl and the floor mounting flange.
  • Clean and level the installation surface before installing the new bathroom.

How to Repair Damaged Flanges

Toilets can be installed in two ways. The set screws can have flat heads, which go into the flange grooves. In this case, the cup is attached to the same flange; the flange serves as a support for the toilet.

The second class of set screws has a screw-type thread at one end and a screw thread at the other. These adjustment screws secure the toilet directly to the floor. The flange in this type of installation acts only as a support for the wax seal and does not withstand the clamping pressure of the cup.

After removing the old bathroom, you may find that the flange on which it is installed is damaged. The cable ties can be made of various materials, such as cast iron, copper, brass and plastic. If the flange is badly damaged, you can ask a plumber to replace it. If it is not too cracked or broken, you can make a simple and permanent repair with a special flap that is under the flange edge.

This guide has a hole through which the adjustment screw is placed. After the screw is inserted into the hole, the guide is placed under the edge of the flange on the broken part. As the adjustment screws are tightened, the tab is pressed against the bottom of the flange edge, holding the cup in place.

Obviously, if the toilet is installed directly on the wooden floor and not on the flange itself, the flange seat (the inner circle against which the wax will seal) is the important thing. If the flange has cracks or breaks inside, it will need to be replaced.

How to install the new bathroom

Always refer to the manufacturer’s instructions for the model purchased.

How to put the mug

You can install a new toilet bowl in the same way that you removed the old one, in pieces.

  • Insert the adjustment screws if they are the type that goes to the flange and place them in a line parallel to the wall behind the toilet. If they are the type that bolts to the floor, put the new screws in place of the old ones.
  • Turn the mug over on the floor. Place something underneath (a rug or blanket) to prevent damage. Install the wax ring at the waste outlet with the tapered end facing the toilet. The waste outlet is the protuberance at the base of the toilet that extends to the flange. A ring of tempered wax is softer and more flexible. If you bring your ring in a cold environment, allow it to warm up before performing this step.
  • Disconnect the waste drain hole and place the toilet on the flange. Install washers and retaining nut loosely. Make sure that the taper washers are installed with the correct side up. These washers are labeled in the manufacturer’s instructions.
  • Position the toilet and press gently against the wax ring and flange in a rocking motion.
    Once the cup is in place, tighten the nuts on the adjustment screws, alternating from side to side, so that the pressure is evenly distributed.
  • Install the screw covers on the adjustment screws. After the installation is complete and you check for leaks, you can seal the base of the toilet with sealant. Silicone sealant for bathtub and bathtub can be used. It can be applied from the tube and smoothed with a damp finger.

How to install the tank

  • Install the large rubber ring over the outlet at the base of the tank according to the manufacturer’s instructions.
  • Insert the tank mounting screws and rubber washers from inside the tank, through the container mounting area.
  • Put the tank in place and tighten the nuts alternately until the tank is firmly attached to the bowl. Again, don’t over-tighten.
  • Install a toilet seat according to the manufacturer’s instructions.
  • Install the water supply line. If you are using the new flexible water supply line, this step is easy. If you use a rigid supply line, you will need to bend it a little to accommodate it. Do not wave the line. This will obstruct the flow of water and weaken the line, causing it to break or leak.

How to adjust the discharge mechanism

After changing the toilet, its operation will need to be checked and some minor changes to the flushing mechanism may be necessary. Try flushing to see if it works and needs to be replaced. Follow the manufacturer’s instructions.