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Are you installing a new toilet? There are certain tools and materials you will need to get the job done yourself. You will need to have some knowledge of basic DIY skills too.

If you are not confident or just want to be sure it’s done professionally, you can hire a local plumbing company to do the following work for you. Keep in mind when installing a new toilet in a completely new location you will need a plumber to connect the sewer drain and water supply line run as this must be done by licences plumbers.

You do not have to replace the whole toilet if the seat has broken, just go to the store and look at how to replace a toilet seat. The same goes for replacing a toilet cistern, although you probably want to update with completely new toilet installation. So that’s what we’re going to cover here.

Materials and tools you will need


  • Shut off valve
  • Two-piece toilet
  • Bolts to hold the toilet to the floor
  • Possibly plumber’s putty
  • Supply tube
  • New toilet seat
  • Flange
  • Wax ring (no seep)


  • Mini hacksaw
  • Adjustable wrenches
  • Set of screwdrivers
  • Cutter for tubing

Step One – Are you using the new flange or the old?

If you choose to use the old one then replacing the flange 3/16 inch bolts is the best move. If you decide to replace the flange when installing a toilet make sure the floor it screws into is wooden. For concrete, you need concrete self-tapping screws.

Step Two – The wax ring and the toilet bowl

Take the wax ring and place it on the toilet making sure you bought the right size for example if you have a 3-inch toilet elbow then you need a 3-inch neck. The next step to installing a toilet takes some strength, another pair of hands, and make sure you lift with your legs, not your back. Straddling the toilet bowl lift and set it over the anchor bolts then rock on the toilet till the wax ring is sealed.

Step Three – Taking care of some of the nuts and bolts

Using your hand tighten the nuts over each anchor bolt, shimming as needed to keep it level. Then take your adjustable wrench and tighten off each nut doing a half turn and moving between the bolts until they are tight but not too tight. Using the mini hacksaw you can cut the flange bolt down so you only have between a quarter and half an inch extending above. When installing the toilet take care not to bend the bolt. Now you can install the bolt cap, in some cases you might need the putty to fill it and in other cases, the cap just snaps on.

Step Four – The tank and how to replace a toilet cistern

Place the anchor bolts for the tank in the holes so you have where to aim when you place the tank. Now lift the tank over the bowl of the toilet, this is another step where another person is handy. Guide the tank down so the bolts go into the holes. Taking your adjustable wrench hold onto the but while you use the screwdriver to tighten the bolts. Again do not make it too tight, it could crack the bowl or the tank or both!

Step Five – Put in the shutoff valve

Place the shutoff valve on top of the compression ring and then put on the nut and tighten till just hand tight. Then you will need two adjustable wrenches, one to hold the valve back and then the other to use on the compression nut.

Step Six – Measuring and connecting the supply pipe

Use the tubing cutter and cut the supply pipe so that it fits in the shutoff valve. When installing a toilet make sure the shutoff valve and the supply line are compatible. Place the end of the pipe to the tank put on the tank nut and use your hand to tighten. Then place a compression nut at the other end of the compression ring and sit the end in the shutoff valve outlet.

Step Seven – Carefully tighten up and check for leaks

With the adjustable wrench tighten carefully a little and now you can check your work. Turn on the water supply again and look and touch to check for leaks. Flush and again check including at the tank’s base. If there is a leak anywhere tighten in half turns and check again. If the toilet is not flushing, check the water level in the cistern.


And there you have it, here’s the step-by-step guide on how to install a toilet. Like what we said earlier, if you are not confident in installing a toilet by yourself, a toilet plumbing specialist could definitely help you. Just make sure that these are licensed professionals and will provide a workmanship guarantee for your piece of mind. And if you got any questions, do not hesitate to comment!