How to Install Rear Discharge Toilet – Step by Step Guide

Instead of flushing waste downward, rear discharge toilets flush waste backward. In Europe and the United Kingdom, these types of toilets are used widely. House exterior, where sewage plumbing lines are generally installed, you can do it yourself and install a rear-outlet toilet. If you have wall-mounted toilet plumbing fittings and no specialist plumbing tools needed.

Backflushing or rear discharge toilet fixtures provide several advantages in your house or workplace. In general, there are two forms of flushing in western design toilets: floor flushing and backflushing. The bathroom frequently performs better than the floor flushing unit when it has a back flushing or discharging counterpart.

Rear outlets toilets VS Wall-mounted toilets:

Rear outlets toilets VS Wall-mounted toilets
  • Unlike ordinary toilets that drain through the floor, rear toilets discharge their waste via the wall behind them. They’re more frequent in high-rise apartment buildings. Plumbing work through the floor is more complex and expensive in these cases. There is a growing trend in private houses to rear discharge toilet installation when remodeling a bathroom or installing a new toilet without digging up the floor.
  • Wall-mounted toilets are toilets that are installed on the bathroom wall, exposing only the bowl. It is hidden in the bathroom wall and is backed by a frame called a carrier, which also holds the toilet bowl. The tank and piping are hidden behind a thick wall. A floor-mounted toilet with a rear outlet is clearly visible, as its toilet tank. Toilets can be either one-piece or two-piece designs, depending on the manufacturer.

How do rear outlets toilets work?

The waste outlet is linked to the wall hub fitting using a P-trap connector in a rear outlet toilet. After flushing, the waste travels through the wall and into the sewer or septic tank. In most cases, they use pressure-assisted flushing, which is more powerful and noisier than a gravity-flushing system. Instead of creating a strong siphon, rear toilets must use a pressure-aided flushing system. 

How can you get this installation done?

How can you get this installation done

Single or dual-piece toilets with a rear exit are available. Installation is quite easier with a single-piece toilet; instead, a dual one is a little more difficult.

You’ll need the following materials:

  • Using the correct bit on a drill machine
  • Fixing PVC adhesive with a screwdriver
  • Socket wrench with a deep recess
  • Wrench with a variable length adjustment
  • Pencil
  • Connection for the P-trap on the toilet’s rear output

Step 1: Let’s install the tank first

Let's install the tank first

Assemble the tank bolts by sliding a washer made of steel. Rubber washers must be firmly attached to the toilet’s body. As a result, the toilet will not crack if the bolts are over-tightened. Bolts should be threaded through the tank’s interior and into the holes for installation. You have to make sure that a rubber washer is connected to the bottom of the tank’s bolts, a metal washer, and a nut. To tighten the bolts, use a wrench to grip them using a deep socket wrench from within the tank.

Step 2: The toilet should be placed in a proper location

Then, put down the toilet bowl in its final location. Make sure to take measurements of the distance between the outlet and wall-hub fitting with the help of a measuring tape. Connectors should be able to move 1.5 inches into wall hubs. The connection may be trimmed to size using a hacksaw once the length has been established. By using a pencil mark spots on the mounting holes for the toilet bolts as well. Dispatch the toilet and store it in a convenient location.

Step 3: Install and then caulk the toilet

Install and then caulk the toilet

Slide P-trap connection within the wall hub fitting after applying PVC adhesive to it. Lift the toilet away from the wall and gently line and insert the outlet within the connector. The two bolts should be inserted through the bowl’s two mounting holes. Tighten it with the help of a wrench. Turn the shutoff stopper anti-clockwise and let the water fill the tank; simply attach the toilet seat. 

Cementing the connection between a toilet and the floor makes cleaning simpler and prevents water from running and accumulating beneath the toilet.

Sum up!
Your installation is possible if you have prior expertise with this toilet installation method in any other location. To install it fast in your bathroom, you may use these suggestions. Installing and repairing any problem with your toilet is easy since rear discharge toilets are highly common worldwide. It would be best if you employed an expert to install or repair it.