How to Install a New Toilet

Installing a new toilet isn’t as complicated as you might think, but there are things to consider before getting started.  It’s important to make sure you can isolate the water supply and ensure the soil pipe doesn’t need adjusting. If either of these things does require adjustment, we advise contacting a plumber before getting started.

The next thing to consider is the floor.  The floor is an important factor because affecting it will require changes to both your bathroom and toilet.

If you are looking to change the floor height, we recommend using an ‘offset’ pan tube and pipe connector.  If your adjustments are on a slightly larger scale, again, professional advice may be necessary.

If your bathroom floor isn’t even, we advise using a silicon sealant to level it out. Alternatively, you can use wooden or plastic wedges to do this. However, if wedges are used, remember to silicon them down for safety reasons.

The direction of your toilet’s soil pipe is another important factor. When the soil pipe comes through the floor rather than the wall, a 90-degree bowl connector may be required. Again, as bathroom experts, we advise consulting with a plumber for a professional recommendation.

This blog article will instruct you on how to best install a close coupled toilet, arguably the most commonly used toilet.

Close coupled toilets are defined by their cistern-pan positioning - the cistern always sits on top of the pan.

If you’re looking to fit a high-level or low-level toilet, you must own strong fixing points to support the cistern weight.  For outside walls, this isn’t a problem, but for hollow walls, cisterns fittings should go into timber studs.

In certain situations, you may have to cut plasterboard away and replace it with horizontal wooden support.

When planning to change your bathroom 

we advise talking with an electrician to find out whether structural changes are necessary.

  1. In order to install a new toilet, you first have to take the old one out. So the first thing to do is turn off the water supply at the shut-off valve.
  2. Flush toilet to get rid of as much water as possible out of the cistern.
  3. Using a mug, scoop the remaining water out of the pan.
  4. Unscrew the screws at the base of the pan.
  5. Unscrew the retaining screws that connect the system to the wall
  6. With both disconnected, now ease the bowl and cistern away from the wall, allowing the waste pipe to disengage from the toilet connector.
  7. When installing the new toilet, the bulk of the work will come from constructing the cistern, so make sure you have every component needed to do this.
  8. Dependent on the brand of toilet you purchase will affect the instructions given to construct it.  Follow your manufacturer’s guide on assembling the inner part of the cistern.
  9. Where instructed, tighten screws properly. This does not mean over tightening them, so if possible tighten them by hand.
  10. The majority of close coupled toilets will have cisterns that need bolts to connect them to the pan. Make sure you screw these bolts on in the correct order.
  11. Be sure the large close-couple washer is positioned at the top of the pan and then position the cistern in place.
  12. Insert a pan tube into the soil pipe making sure it fits tight, with no gaps or spare room.
  13. Then align the toilet next to the soil pipe making sure the pipes are aligned. If they are not you may need an off-set pan tube to connect them.
  14. Carefully place the toilet on to the back wall, ensuring the waste fits perfectly into the toilet connector. Make sure the toilet goes right into the connector collar.
  15. Ensure the cistern is level by using a spirit level. Using a pen or pencil mark of the fixing holes at the back of the cistern.
  16. Make sure the toilet pan is level by using a spirit level.  Using a pen or pencil, mark off the fixing holes.
  17. Mark around the edge of the toilet pan using a pencil. This will indicate the exact position of the pan once it comes to final fitting.
  18. Remove the toilet from the wall. Navigate where to drill the cistern fixing holes using the marks on the wall. Pick and put in relevant plugs according to the wall surface.
  19. Drill holes for the pan using the marks previously pencilled. Select and insert wall plugs where appropriate.
  20. Using the marked pencil lines as a reference point, apply silicone sealant to where the toilet will be positioned.
  21. Place the toilet onto the sealant. Then screw the cistern in place. Remember not to over tighten.
  22. Position the screws at the bottom of the toilet and then secure the pan to the floor. Again, use all the washers provided and remember not to over tighten.
  23. Reconnect the water supply. It might be useful to use a flexible connector depending on the position of the toilet pipe.
  24. Turn the water supply back on and check all aspects of the new toilet to make sure it’s leak free.
  25. Secure the seat by inserting bolts through the pan and add a washer and nut. Adjust as necessary to fit correct the toilet bowl shape.
  26. Silicone all the way around the base of the toilet pan and smooth off with a damp sponge for a neat finish.

At Bathroom City, we have a wide variety of toilets, perfect for every style of bathroom and en-suite. For more information around the toilets we provide, call today on 0121 753 0700 or visit our showroom in Tyseley– opening times are Monday to Friday 9:00 to 5:30 pm or Saturday 9:00 : 5:30 pm or Sunday 10:00 to 16:30 pm.