A Guide to Rerouting Plumbing Pipes during a Home Renovation

6 Jul by Will Kruse

A Guide to Rerouting Plumbing Pipes during a Home Renovation

Home renovations are exciting for homeowners but can also be daunting when dealing with existing plumbing systems. Rerouting plumbing pipes is often necessary for renovation, especially if you’re making significant changes to your home’s layout.

This guide will explore critical steps to consider when rerouting plumbing pipes during a home renovation, including planning, materials, and plumbers assistance.

Step 1: Assessing the Current Plumbing System

Before any work can begin, it’s essential to understand your home’s existing plumbing system clearly. Locate the main water supply and sewer lines and any additional pipes that connect to appliances, fixtures, and drains. This information will help you determine the necessary changes and materials for rerouting.

Step 2: Planning and Design

Once you clearly understand your existing plumbing system, you can begin to plan the necessary changes. This may involve altering the layout of your pipes to accommodate new fixtures or appliances or even moving the main water and sewer lines to improve efficiency.

When planning your new plumbing design, it’s crucial to consider local building codes and regulations. These guidelines will help ensure your renovated plumbing system is safe, efficient, and up to code.

Step 3: Selecting the Right Materials

Choosing the appropriate materials for your plumbing project is critical to the renovation’s success. Several options are available, each with its benefits and drawbacks.

Copper piping is a popular choice for its durability and resistance to corrosion. However, it can be more expensive than other materials and may require soldering skills for proper installation.

PEX (cross-linked polyethylene) tubing is a flexible, easy-to-install option resistant to corrosion and freezing temperatures. Although PEX is more affordable than copper, it may not be suitable for outdoor use or exposure to sunlight.

PVC (polyvinyl chloride) pipes are another cost-effective choice that is easy to install, but they may not be suitable for hot water applications due to their lower temperature tolerance.

CPVC (chlorinated polyvinyl chloride) pipes are a more heat-resistant alternative to PVC, making them suitable for hot and cold water applications. However, they may be more susceptible to cracking and are less flexible than PEX tubing.

Step 4: Preparing for the Rerouting Process

Before starting the plumbing rerouting process, shutting off the main water supply to your home is necessary. This will prevent any potential water damage during the renovation.

Once the water supply is off, it’s crucial to drain the existing pipes by opening faucets and fixtures. This will help to minimize any mess during the pipe removal process.

All necessary tools and materials are essential before beginning the rerouting project. This may include wrenches, pipe cutters, torches, soldering equipment, and the appropriate pipe and connector materials.

Step 5: Rerouting the Pipes

With appropriate planning and preparation, the actual process of rerouting plumbing pipes can be relatively straightforward. Depending on the scope of the renovation, this may involve simply replacing pipe sections, or it could require a complete overhaul of the entire plumbing system.

When rerouting pipes, ensuring all connections are secure and leak-free is essential. This may involve soldering copper pipes or using appropriate connectors and clamps for PEX or PVC materials.

Additionally, it’s crucial to maintain proper slopes for drain pipes to ensure that wastewater flows efficiently away from your home. This typically involves holding a slope of at least 1/4 inch per foot for horizontal drain pipes.

Step 6: Testing and Inspection

Once the rerouting process is complete, it’s essential to thoroughly test your new plumbing system for leaks and proper function. This may involve turning on the main water supply, checking for visible leaks, and testing faucets, fixtures, and appliances for proper water flow and drainage.

It’s also crucial to have your newly rerouted plumbing system inspected by plumbers or building inspectors. They will be able to ensure that your new system meets all local building codes and regulations and identify any potential issues that may take time to be apparent.


Rerouting plumbing can be complex and labor-intensive, requiring careful planning, execution, and testing. Whether you’re doing it to accommodate a remodel, repair a damaged pipe, or improve your plumbing system’s efficiency, following the proper steps and seeking professional plumbers assistance when necessary is essential. By doing so, you can ensure that your new plumbing system functions effectively and safely for years.

L.J. Kruse Co. stands out as an exemplary family-owned and -operated plumbing, heating, and cooling company dedicated to providing exceptional services to its clients in Berkeley, California. Leveraging our extensive experience, skilled technicians, and commitment to quality, we ensure that our clients receive the highest service standards, regardless of the project size. To schedule a consultation with our team of expert plumbers in California, do not hesitate to contact us.

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