DIY WC Unit Installation Guide

I wouldn't call myself a plumbing pro. As a DIY enthusiast, my greatest achievements involved assembling bookshelves and occasional faucet changes. Tackling the WC unit's installation job as DIY was both tempting and terrifying. It wasn't all smooth sailing, but through it all, I learned a valuable lesson: with a little research, the right tools, and a willingness to learn from mistakes, even a DIY newbie can tackle seemingly daunting tasks. If you are considering a WC unit installation then grab your tools, follow this guide, and get ready to experience the satisfaction of a DIY job well done.

For an average homeowner, installing a WC unit for a back to wall toilet  might seem intimidating at first. But once you fetch the right tools and grow some patience, it will feel nothing more than a simple DIY project. 

Tools Required

• Adjustable wrench
• Screwdriver
• Level
• Tape measure
• Wax ring
• Closet bolts
• Plumber's putty or silicone caulk
• Bucket and sponge
• Towels or rags
• Hacksaw (if needed)

Materials

• WC toilet unit with cistern and flush mechanism
• WC cistern and flush mechanism
• Toilet Bowl, seat, and lid
• Waste pipe
• Mounting screws and brackets
• Sealant (Silicon)
• Water supply pipe and valve
• Cleaning and sanitizing solution
• Teflon tape
• Bolts and nuts
• Wall plugs

First things first. The water shut-off valve is located close to the toilet's base. To reduce the supply, turn it clockwise. Now flush your toilet to drain as much water as possible. You can use a sponge or towel to soak up any remaining water in the tank.

If you’re upgrading or replacing an existing toilet, you’ll need to disconnect it first from the main water supply line. Start unscrewing the nuts on the base of the toilet seat that secure it to the floor. Rock the toilet gently back and forth to break the seal and lift it off the floor. Remember to remove the old wax ring from the flange on the floor using a putty knife.

Examine the floor-mounted pipe fitting, or flange, for any signs of damage. If it's cracked or broken, replace it immediately. While you are at it, make sure that the flange is level with the floor. If it's too high or too low, it can be difficult to seal.

Place new mounting/closet bolts into the slots on the flange. These will anchor your new toilet to the floor. The bolts should be evenly spaced and pointing straight up for the secure attachment.

Place a new wax ring onto the bottom of the toilet bowl outlet. You can also place it directly on the flange if you prefer. Make sure the wax ring is centered to ensure a strong seal.

Carefully lift the toilet and align the holes at the base with the closet bolts on the flange. Press down with a little force to compress the wax ring and create a seal.

Place washers and nuts onto the closet bolts. Tighten them by hand, then use an adjustable wrench to make them snug. Be careful not to overtighten, as this can crack the porcelain. You can also use rubber gaskets to prevent breaking.

The waste pipe should be fastened to the outlet at the back of the toilet. Make sure it fits snugly and is properly aligned with the drain pipe in the floor. If the connection seems weak or wobbly, don’t refrain from using a pipe extension piece to create a firm fitting.

Place the cistern on the back of the toilet bowl while keeping the bolts and holes aligned properly. Insert the bolts through the holes and secure them with washers and nuts. Tighten the nuts evenly with an adjustable wrench so there aren’t any leaks.

Using a rubber gasket on the bowl is preferred when fastening the cistern. Secure the flush valve and handle as per the instruction’s manual.

Reattach the toilet tank's water supply line. While you check for leaks near the point of connection, turn on the water supply to fill the cistern. Before giving it the green signal, flush the toilet several times to ensure it’s working properly. If you notice any leaks, you may need to re-tighten the bolts or adjust the wax ring.

With the installation complete, it is time to add the finishing touches. From installing a toilet seat to cleaning the area, and adding features like a soft close lid, or a bidet attachment, you can personalize your toilet experience in various ways. 

Installing the Toilet Seat

Most back-to-wall toilets at Royal Bathrooms come with a soft close seat. It is rather easy and will take around five minutes. Here is how you can install a toilet seat.

Step 1. Simply align the holes in the new seat with the mounting holes on the toilet bowl. Lower the seat gently onto the bowl. 

Step 2. Insert and tighten the bolts through holes in the seat and toilet bow

Step 3.  Use a wrench or pliers (a screwdriver in some cases) to further tighten the nuts. Be cautious not to over tighten it. 

Step 4. Test the seat by gently pushing down on it. Ensure it does not wobble. If it does try further tightening the nuts a little to make it stable and secure for use. 

Honestly, installing a toilet can get a little messy. Therefore, a thorough cleaning of the bathroom floor is necessary. Remove the debris and leftovers from the place and clean the area. It can be quicker and easier if you put a plastic sheet on the floor before the start of installation.

You can consider a few simple upgrades like I did. They don't cost much but have a great impact on functionality and aesthetics. Opt for a soft close seat when choosing a toilet seat for your toilet bowl. A rimless toilet bowl design is another feature that you would want in your toilet. The absence of conventional rims around the edges makes cleaning a breeze. Additionally, a bidet in the toilet can be a nice addition to the toilet.

Before we wrap up,  the big question that always strikes every DIYer is: Should you DIY WC unit installation? Here’s a breakdown to help you decide:

• Cost Factor: Installing your toilet saves you money. However, you may need to buy tools if it is the first time you are going DIY. 
• Your Skills: If you're comfortable with basic DIY tasks and have a good understanding of plumbing connections, then this project is for you. But complex plumbing issues or major renovations should be better left for professionals. 
• Confidence Factor: Be honest with yourself about your DIY skills and comfort level. This project requires patience, problem-solving abilities, and the willingness to learn from mistakes.

Even the most experienced DIYers have their limits. Therefore, it is important to know when to call in the professional for help. 

• Hidden Leaks: If you suspect a leak behind the wall or under the floorboards, don't attempt a DIY fix. Water damage can be expensive and extensive, so leave this to the professionals.
• Cracked Toilet Bowl: A cracked toilet is a ticking time bomb waiting to burst. Don't risk a major flood, call a plumber immediately.
• Complex Plumbing Issues: If you're dealing with a clogged drain line, low water pressure, or any other complex plumbing problem, it's best to leave it to a licensed professional.

Feeling adventurous and want to give DIY toilet installation a short? This blog is here to help you through the process. It will give you a glimpse into the world of DIY installation. The decision is yours! Consider your skills, comfort level, and the tools you have on hand. Just remember, there's no shame in calling in a plumber if you get stuck.