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Toilet Supply Lines: Plastic vs. Metal
Toilet Supply Lines: Plastic vs. Metal
4.8 RATING

Toilet Supply Lines: Plastic vs. Metal

When it comes to toilet installation or toilet replacement, one of the crucial aspects of the job is to consider the type of material to…

August 08, 2026
Toilet Supply Lines: Plastic vs. Metal

When it comes to toilet installation or toilet replacement, one of the crucial aspects of the job is to consider the type of material to use for toilet supply lines. In most cases, the choice comes down to two main types of piping: plastic piping and metal piping. So, which material is better? Some plumbers lean towards plastic piping due to its cost-effectiveness and ease of installation, while many old-schoolers still think metal piping is the best. Let’s explore what each type of material has to offer so you can make an informed decision.

Plastic Pipes

Plastic pipes are made from PEX, CPVC, or PVC, each with unique properties and temperature limitations. In today's plumbing landscape, plastic piping tends to be used more for toilet water supply lines compared to metal piping. This shift has occurred for several reasons, including cost-effectiveness, versatility, and ease of installation. However, there are many people who still prefer metal piping for a variety of reasons. 

Advantages of Plastic Pipes

  • Cost-effective: Plastic pipes are cheaper than metal pipes, both in material and installation costs. This makes them an attractive option for budget-conscious projects or cost-saving renovations.
  • Easy installation: They’re flexible and require simpler connection methods like crimping or gluing, making them DIY-friendly.
  • Corrosion-resistant: These pipes are immune to most water elements. This reduces leak risks and ensures a longer lifespan.
  • Freeze-resistant: Certain types, like PEX, expand slightly when frozen, preventing bursts during cold weather.

Our Customers Reviews

Chahib Chakrome

Summit, NJ

The service provided was great, nothing to say about the work of the plumber. 5 stars to him. But the company charges felt way too much for the work. We would have liked to have the same plumber take care of other things in the house, but every time he check how much extra the company will charge for the job, the price just got too much. The plumber did an amazing job he selected a beautiful faucet to replace our old one. He did his best. But the company prices have no room for negotiation.

Tiffany DeSande

Plainfield, NJ

A million stars!!!! Steve and Lucas were absolutely amazing. My parents pipes burst and within 4 hours of calling they came and fixed everything!!! Very nice guys and dealt with my panicking. I will always use them if needed in the future and you all should too!!! Thank god for people like this!!! Thank you so much guys!!!

Naomi Langer-Seltzer

New Brunswick, NJ

We got very quick service, I think the plumber actually arrived in less than an hour! After reviewing what was happening, he gave us our options and performed the option we selected. This happened in the late afternoon or early evening. It was already dark and there was a lot of snow on the ground.

Steve Smith

Mountainside, NJ

I needed immediate, same day service in the early evening at my home. I went to the internet and looked up plumbing services that offered "24-hour, 7-day a week" availability. The first 3 places I called said that they could not get to me until the following day. Then I called Mr. Rooter. They were courteous and promptly got a technician to my house within an hour and a half. The technician, Lucas Kaufmann, was exceptional. The job was not easy, but he figured the problem out and got me all fixed up within an hour's time. Moving forward, I…

Stephanie Brown

Cranford, NJ

Despite what was quite obviously a busy day (day after Thanksgiving at 10pm) TJ came out and did not leave until the job was done! There were several setbacks, which at the late hour might have prompted him to leave- but he chose to stay and continue until the job was complete! I only have one bathroom so I was really hoping he could make it work, and he really did a wonderful job! So thankful for all of his help! I highly recommend TJ!

Shaheen Dhanani

Union, NJ

This is my second time using Mr. Rooter and I have to say they are an excellent company of experienced professionals! The service techs were courteous, experienced and actually spent time trying to figure out the issue before proposing the solution. They were also patient and answered all my questions without rushing the work. I will be using them again.

Christie Murphy

Montgomery, NJ

TJ was amazing! 10/10 recommend this company. We were in an emergency state of panic with a burst pipe in the middle of a bad snowstorm. TJ came with knowledge, professionalism, kindness, and found the root of the problem within five minutes of being here. We will be using him again in the spring to fix an outdoor issue he found!

Alan Abraham

Clark, NJ

The technicians were friendly, professional and knowledgeable. The price was too high I believe, but the technicians had no control over that. The technicians took their time and did a great job. I would use them again and also recommend them.

Amy Swart

Berkeley Heights, NJ

Excellent service! Charles and Nicholas of Mr. Rooter arrived to my scheduled service a few minutes early, wore sanitary shoe coverings, and were extremely professional. They found the source of my leak quickly and fixed the issue. While they here, I requested an additional hydraulic heating inspection which they accommodated. They were very knowledgeable and provided helpful tips. I highly recommend this team and I will definitely call them for all future plumbing needs!!

JACKY Coppola

Wall Township, NJ

TJ came to my aid as the water pipe froze in my house. Although nothing could be done he gave me hints of what could be done my me which was very helpful. I found TJ very professional and caring about my situation. The best part of the very long night was the dogs adored him one wanted to accompany him to his next job. Thank you for employing such an amazing man. Plus today there is water running in the house. Thank you TJ and thank you Mr. Rooney plumbing for employing a man with helpful hints!!!!!

Disadvantages of Plastic Pipes

  • Temperature limitations: Not all plastic piping types handle high temperatures like metal. It’s advisable to check specific ratings so that you can make the right choice.
  • Susceptible to damage: Plastic pipes can be punctured or damaged by sharp objects or extreme heat.

Metal Pipes

Metal piping, traditionally used in plumbing, offers distinct characteristics compared to its plastic counterpart. There are three types of metal pipes—copper, galvanized steel, and stainless steel, each with different strengths and weaknesses.

Advantages of Metal Pipes

  • Durability: Metal, particularly copper, is extremely durable and can last for decades with proper care. They are less susceptible to wear and tear compared to plastic options.
  • High-temperature resistance: Metal pipes can handle higher water temperatures than most plastic options, making them suitable for hot water supply lines.
  • Aesthetics: Copper pipes can offer a traditional and aesthetically pleasing look in exposed areas.

Disadvantages of Metal Pipes

  • Cost: Metal pipes are generally more expensive than plastic options like PEX and CPVC.
  • Installation complexity: Installing metal pipes, especially copper, requires soldering skills and specific tools, making it more challenging for DIY projects.
  • Susceptibility to corrosion: While some metals are resistant, others like galvanized steel can be prone to corrosion in specific environments.

Plastic Piping vs. Metal Piping: Which One Should You Choose?

As you can see, each type of piping material offers distinct characteristics and advantages. Your choice boils down to your specific needs, budget, and local regulations. At Mr. Rooter Plumbing, we recommend you:

Choose metal pipes if:

  • You prioritize durability and longevity.
  • You value the traditional look of copper pipes.

Choose plastic pipes (PEX or CPVC) if:

  • You're on a budget.
  • You prefer a simpler installation process.
  • You're conceed about corrosion risks in your water.

If you’re unsure about the pipe material to choose for toilet supply lines, you can always consult with a professional plumbing service that specializes in toilet installation, repair, and replacement.

Mr. Rooter Plumbing: The Go-To Plumbing Repair Service for Toilet Installation and Replacement

If you’re looking for an all-in-one plumbing service that can install, repair, or replace your toilets, look no further than Mr. Rooter Plumbing. We’ve built an outstanding reputation over the years for offering quality toilet installation and toilet replacement services for both homeowners and businesses. 

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