How to Plumb an Upstairs Toilet: DIY Guide & Cost Breakdown

Plumbing an Upstairs Toilet: A Comprehensive Guide

Plumbing an upstairs toilet can be a daunting task, but with the right knowledge and tools, it's a job you can tackle yourself. This guide will walk you through the process step-by-step, ensuring a professional finish that will serve you well for years to come.

Tools and Materials Needed

Before you start, make sure you have the following tools and materials:

  • Toilet (including tank and bowl)
  • Wax ring
  • Toilet bolts and washers
  • Tape measure
  • Level
  • Adjustable wrench
  • Hacksaw
  • Screwdriver
  • Plunger
  • Bucket

Preparation

Before you begin, turn off the water supply to the old toilet and flush it to empty the tank. Disconnect the water supply line and the drain line, then remove the old toilet. Clean the area thoroughly to prevent any blockages or unpleasant odors.

Second Floor Bathroom Plumbing Diagram Bathroom Layout Planner

Installing the Wax Ring

The wax ring is a crucial component that creates a watertight seal between the toilet and the drain. Center the wax ring on the drain opening, ensuring it's flush with the floor. If the ring is too high, you can trim it with a hacksaw.

Positioning the Toilet

Position the toilet bowl over the wax ring, ensuring it's centered and level. Use a tape measure to ensure the toilet is the correct distance from the wall (usually 12 inches). Once you're satisfied with the position, gently press down on the toilet to create a tight seal with the wax ring.

Securing the Toilet

Secure the toilet to the floor using the bolts and washers provided. Insert the bolts through the holes in the base of the toilet and the floor, then secure them with washers and nuts. Tighten the bolts by hand initially, then use an adjustable wrench to tighten them further. Be careful not to overtighten, as this can crack the porcelain.

How To Install Toilet Upstairs at Bessie Debra blog

Installing the Tank

Position the tank on the bowl, aligning the holes with the bolts on the bowl. Secure the tank to the bowl using the provided bolts and washers. Connect the water supply line to the tank, ensuring it's securely fastened and there are no leaks.

Testing the Toilet

Slowly turn on the water supply to the toilet. Check for any leaks around the base of the toilet or where the water supply line connects to the tank. Flush the toilet to ensure it's working correctly. If everything is functioning as it should, you're done!

Troubleshooting Common Issues

Issue Solution
Leaking around the base of the toilet Tighten the bolts or replace the wax ring
Toilet rocks or wobbles Tighten the bolts or use shims to level the toilet
Toilet doesn't flush properly Check the water level in the tank, ensure the flapper is sealing properly, or clean the jets in the rim of the bowl

Reference

Plumbing for a Second Floor Bathroom - YouTube

12.12.2020 ... Plumbing for a Second Floor Bathroom. Part of the series: Plumbing Repairs. When plumbing for a second floor bathroom, there are a few ...

Second Floor Bathroom Plumbing Diagram Bathroom Layout Planner

Second Floor Bathroom Plumbing Diagram Bathroom Layout Planner

Reference

Adding An Upstairs Toilet, Micklefield - UK Bathroom Guru

20.06.2024 ... Joinery – for building new stud walls, hanging doors & fitting skirting/architrave etc; Plastering; Painting; Plumbing; Flooring; Electrics ...

How To Install Toilet Upstairs at Bessie Debra blog

How To Install Toilet Upstairs at Bessie Debra blog

Reference

Installing upstairs toilet - Screwfix Community Forum

08.04.2013 ... Make sure the soil pipe is connected to the inspection chamber by flushing the existing toilet with the lid of the chamber.

Plumbing Diagram For Upstairs Bathroom at Morris Rios blog

Plumbing Diagram For Upstairs Bathroom at Morris Rios blog

Reference

Drain Pipe Plumbing Installed In Second Story Home Addition With ...

02.12.2021 ... How To Vent Plumbing Pipe - Toilet, Bathroom Sink, and more! The Excellent Laborer•789K views · 30:35. Go to channel Bathroom Remodeling Teacher ...

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Plumbing Diagram Venting And Drains Rough Plumbing Diagram Shows Drain

Reference

A Detailed Guide on How to Run Plumbing for an Upstairs Bathroom

Start drilling from the upstairs bathroom towards the downstairs location of the existing hot and cold water lines. Be mindful of the electrical wires, plumbing ...

Bathroom Plumbing and Design Integration

Bathroom Plumbing and Design Integration

Reference

How To Vent & Plumb A Toilet (Step by Step) - YouTube

02.02.2017 ... Grab Your FREE Cheat Sheet: 1. *** Free Toilet Venting Guide: https://hammerpedia.com/vent 2. *** 2 Free Bathroom Plumbing Plans: ...

How To Run Plumbing For Bathrooms In Separate Locations

How To Run Plumbing For Bathrooms In Separate Locations

Reference

How would you go about fitting in an upstairs bathroom in my house?

16.12.2021 ... Do your joists run the right direction for routing waste pipes (soil pipe especially) and you'll need the height to get the right fall angle.

Saniflo Toilet How Does It Work at Nichelle Hock blog

Saniflo Toilet How Does It Work at Nichelle Hock blog

Reference

"Detailed plumbing diagram for a second-story bathroom, illustrating ...

16.07.2025 ... This diagram depicts a plumbing system layout for a bathroom, detailing waste, vent, and sewer connections. The system includes a main 3" stack ...

Venting a Basement Toilet | JLC Online

Venting a Basement Toilet | JLC Online

Reference

ULTIMATE Guide for Roughing In a House! 2nd Floor - YouTube

14.07.2025 ... ... How To Plumb A Bathroom In 20 Minutes! - Beginners Guide. The Excellent Laborer•2.3M views · 9:59 · Go to channel Rising Tide Plumbing ...

Installing A Toilet On The Second Floor | Viewfloor.co

Installing A Toilet On The Second Floor | Viewfloor.co

Reference

Plumbing a Bathroom Into an Upstairs Extension - housekeeping

The waste pipe simply has to join the existing pipe on the wall outside by the original bathroom. There is a huge variety of junctions available and the only ...

Up Flush Toilet 9/10 | How To Plumbing - YouTube

Up Flush Toilet 9/10 | How To Plumbing - YouTube

Reference

Can 2nd fl toilet use 1st floor toilet stack? - DoItYourself.com

20.02.2015 ... Can a toilet on the second floor hook into the existing stack? Does it need separate venting, if so? Don't know how to paste my drawing.

Installing Toilet In Basement Floor – Clsa Flooring Guide

Installing Toilet In Basement Floor – Clsa Flooring Guide

Reference

Add a Toilet Upstairs? Plumbing Step Down Guide & Tips

L am wanting to add a toilet to my upstairs (added on above our garage). The sewer line would have to drop straight.

Basic Toilet Plumbing Diagram

Basic Toilet Plumbing Diagram

Reference

Upstairs Bathroom Remodel | Plumbing - Botanic Bleu

02.04.2024 ... This post shows the plumbing challenges we faced going into the remodel and the solutions we found to those challenges.

How a Toilet Works & Toilet Plumbing Diagrams | HomeTips | Plumbing ...

How a Toilet Works & Toilet Plumbing Diagrams | HomeTips | Plumbing ...

Reference

Want upstairs toilet but no soil stack - MyBuilder

14.03.2024 ... Hi, I want to put a toilet upstairs, but have no soil stack as my toilet downstairs ... fitting a T shaped soil pipe in the gap which is attached ...

Bathroom Plumbing Toilet

Bathroom Plumbing Toilet

Reference

How To Plumb a Bathroom (with free plumbing diagrams) - YouTube

07.03.2019 ... Grab Your FREE Cheat Sheet: 1. *** 2 Free Bathroom Plumbing Plans: https://hammerpedia.co/diagram 2. *** Free Toilet Venting Guide: ...

Up Flush Toilet 1/10 | How To Plumbing - YouTube

Up Flush Toilet 1/10 | How To Plumbing - YouTube

Reference

plumbing for upstairs toilet - Yesterday's Tractors Forums

08.11.2014 ... Bust out the concrete and Y into a 3-4" drain line and run it up. No other way to do it. Wet venting, using vent pipe from down as a drain for ...

Everything You Need to Know About Venting for Plumbing Work

Everything You Need to Know About Venting for Plumbing Work

Reference

How to Install a New Toilet | This Old House - YouTube

06.01.2021 ... Contractor Josh Engle starts installing plumbing fixtures in the upstairs bathroom of the Detroit house. SUBSCRIBE to This Old House: ...

Plumbing a Bathroom: Step-by-Step Guide

Plumbing a Bathroom: Step-by-Step Guide

Reference

How To Plumb a Bathroom (with multiple plumbing diagrams)

See the drains & vents come together inside this bathroom. Includes pipe sizes for both major U.S. Plumbing Codes (IPC and UPC).

How To Vent & Plumb A Toilet (Step by Step) - YouTube

How To Vent & Plumb A Toilet (Step by Step) - YouTube

Reference

Where would you advise fitting an upstairs toilet ? | DIYnot Forums

21.01.2025 ... Where to put it? Close to the soil pipe. Avoid long pipe runs, especially if horizontal or small bore. Avoid poo-mincers. Your plan diagram ...

How To Install A Toilet On The Second Floor | Viewfloor.co

How To Install A Toilet On The Second Floor | Viewfloor.co

Reference

How To Vent & Plumb a Toilet (in 2024) - YouTube

21.04.2022 ... Grab Your FREE Cheat Sheet: 1. *** Free Toilet Venting Guide: https://hammerpedia.com/vent 2. *** 2 Free Bathroom Plumbing Plans: ...

Upstairs Bathroom Plumbing

Upstairs Bathroom Plumbing