How to Establish Set Out Requirements for Replacing Toilets

Replacing a toilet involves careful planning to ensure the new unit fits correctly and functions properly. Here’s a step-by-step guide to help you establish the set out requirements for replacing a toilet:

Step-by-Step Instructions:

1. Measure the Rough-In Size:

The rough-in size is the distance from the wall behind the toilet to the center of the toilet’s drainpipe (flange). This measurement is crucial for ensuring the new toilet will fit.

• Standard Rough-In Sizes: The common rough-in sizes are 305 mm (12 inches), 254 mm (10 inches), and 356 mm (14 inches).
• How to Measure: Measure from the wall (not the baseboard) to the center of the bolts that hold the toilet to the floor. This distance is your rough-in size.

2. Measure the Distance from Side Walls or Objects:

Measure the distance from the center of the toilet flange to the nearest side walls or other objects (such as a vanity or tub). This ensures there is enough space for comfortable use and installation.

• Minimum Clearance: Typically, you should have at least 380 mm (15 inches) from the center of the toilet to any side wall or object.

3. Measure the Distance to the Front Obstruction:

Measure from the front of the toilet flange to any obstruction in front of the toilet, such as a wall or door.

• Minimum Clearance: Ensure there is at least 530 mm (21 inches) of clear space in front of the toilet for comfortable use.

4. Check the Height of the Water Supply Line:

Locate the water supply line and measure its height from the floor. This will help ensure that the new toilet’s water inlet aligns correctly with the existing supply line.

• Standard Height: The water supply line is typically 200-250 mm (8-10 inches) above the floor.

5. Identify the Type of Waste Trap:

Determine whether your current toilet uses an S-trap or P-trap configuration.

• S-Trap: The waste pipe goes through the floor.
• P-Trap: The waste pipe goes through the wall.

6. Check the Water Inlet Location:

Identify whether the water inlet is a bottom inlet or a back/side inlet. This will ensure the new toilet’s design is compatible with your plumbing.

• Bottom Inlet: The water inlet is located at the bottom of the cistern.
• Back/Side Inlet: The water inlet is positioned on the back or side of the cistern.

7. Confirm the Bowl Shape and Size:

Decide whether you need a round or elongated bowl based on the available space and user preference.

• Round Bowl: Typically around 400-430 mm in length, suitable for smaller spaces.
• Elongated Bowl: Typically around 460-490 mm in length, offering more comfort.

Establishing the set out requirements for replacing a toilet involves measuring the rough-in size, checking clearances to side walls and front obstructions, and verifying the height and location of the water supply line. Additionally, identifying the type of waste trap and water inlet, as well as deciding on the bowl shape and size, are essential steps to ensure a smooth installation process. By following these guidelines, you can ensure that the new toilet fits correctly and functions properly in your bathroom.

If you're interested in changing your toilets, feel free to visit our toilets collections to find the most in trend and functional toilets.