What Is Quest Pipe? Why Polybutylene Plumbing May Need to Be Replaced
What is Quest pipe? It’s gray, blue, or black plastic plumbing made from polybutylene. Homes built between 1978 and 1995 are the most likely to have it. Over time it turns brittle and leaks. Below, we explain how to spot it and what to do next.
Watch: what Quest pipe is and how to spot it in your home.
What Is Quest Pipe?
Quest pipe, also spelled Qest, is polybutylene (PB) plastic plumbing. It was installed in homes built between 1978 and 1995. It was promoted as an economical, easy-to-install option. Chlorine in city water breaks it down over time. That makes it brittle and prone to leaks.
| Term | What it means |
|---|---|
| Polybutylene (PB) | The plastic the pipe is made from |
| Quest (also spelled Qest) | A name found on polybutylene pipe, and the term most homeowners search |
| Years most common | Homes built from 1978 to 1995 |
| Typical colors | Gray, blue, or black |
In everyday use, Quest pipe and polybutylene point to the same problem. If you’ve asked “what is Quest pipe?” after finding gray plastic plumbing, this is the answer. This Old House says homes built between 1978 and 1995 are most likely to have it. Its polybutylene guide also says to look for “Qest” or “PB” markings.
Why Does Quest Pipe Leak?
Quest pipe leaks because chlorine and other oxidants in city water make polybutylene brittle. Over time the pipe develops cracks, splits, and leaks. Cities add chlorine to kill bacteria. The same water that keeps you safe wears this plastic down. This Old House describes the same failure.
InspectApedia adds that most leak problems with polybutylene supply lines involve failed plastic fittings. Its polybutylene overview explains the history. So a repair at one joint tells you nothing about the others.
The failures also led to lawsuits. A nationwide class action, Cox v. Shell Oil, was filed in 1995. It led to a settlement of at least $950 million. InspectApedia reports that the settlement case is now closed. For the full legal history, see our Quest pipe lawsuit guide and our Quest pipe lawsuit history.
How Can You Tell If You Have Quest Pipe?
Look for dull gray, blue, or black plastic pipe. Check it for “Qest” or “PB” markings. It’s plastic, so it looks very different from copper or galvanized steel. The most common places to find it include:
- Anywhere a pipe comes out of the wall
- Near your water heater
- Near your main water service and shut-off valve
- Any section a plumber cut out during an earlier leak repair
If your Sacramento-area home was built between 1978 and 1995, it’s worth a look. Not sure what you’re seeing? We can confirm it during a free in-home estimate.
Do You Have to Replace Quest Pipe?
We recommend replacing it. Repairing leak by leak doesn’t solve the problem. The rest of the pipe is the same age and sees the same chlorine. More leaks are typically on the way.
No leaks yet? That doesn’t mean the pipe is healthy. Chlorine keeps working on it. Waiting for a catastrophic leak costs more than planning a repipe. Water can reach your walls, floors, and ceilings before you see it.
This Old House’s guide on how to replace polybutylene pipes suggests hiring a professional. It’s not a job for most homeowners. Have copper instead of plastic? Our guide to pinhole leaks in Sacramento covers that case. Older galvanized steel is a different problem. See our guide to galvanized pipes in Sacramento.
What Should You Do If You Find Quest Pipe in Your Home?
Confirm it, then get a replacement estimate before the next leak. Here are the steps:
- If a pipe is actively leaking, shut off your main water valve first.
- Check the color, markings, and location of the pipe.
- Take photos of what you find.
- Schedule a free in-home estimate and ask for a full replacement plan.
Our leak detection tips and emergency water leak guide cover what to do while you wait.
How Much Does It Cost to Replace Quest Pipe?
Replacing Quest pipe means a whole-home repipe. Most repipes run $6,000 to $14,000 with us. That’s an estimate, not a quote. Your price depends on home size, bathroom count, and plumbing access. We confirm a firm price in person after a free in-home estimate.
How Does Creative Repipe Replace Quest Pipe?
Creative Repipe is a whole-home repipe specialist serving Sacramento and the rest of California. We replace Quest pipe with USA-made PEX-A. Most homes are completed in a single day, with larger or more complex homes occasionally taking longer.
You never have to leave your home during the work. We shut off water in sections as we go. Then we turn it back on by the end of every work day. We pull the permits and schedule the inspections the city requires. We patch and texture the drywall the next day. Every repipe is backed by a Lifetime Transferable Warranty.
We also beat any written quote. We hold a 4.9-star rating on Google from hundreds of reviews. Other plumbers refer customers to us too. Comparing companies? Our guide to finding the best repipe company in Sacramento lists what to check. You can also read what to expect if you stay home during a repipe.
Request Your Free Estimate
Found gray plastic pipe in your home? Don’t wait for another catastrophic leak. We look at your plumbing in person. Then we give you a clear plan and a firm price.
Get your free in-home estimate: https://creativerepipe.com/free-estimate/ Call (888) 373-0046 or visit CreativeRepipe.com.
Get Your Free In-Home Estimate
We come to your home, look at everything, and give you a straight answer and firm price — usually within 48 hours of your request.
Prefer to call? (888) 373-0046
Frequently Asked Questions
Is Quest pipe the same as polybutylene?
In practice, yes. Polybutylene is the plastic. Quest, also spelled Qest, is a name found on polybutylene pipe. Most homeowners use the two terms for the same plumbing.
What years was Quest pipe used in homes?
Homes built between 1978 and 1995 are the most likely to have it. If your home was built in that window, check for gray, blue, or black plastic pipe.
How much does it cost to replace Quest pipe?
Most whole-home repipes run $6,000 to $14,000 with us. The price depends on home size, bathroom count, and plumbing access. We confirm a firm price after a free in-home estimate.
How long does it take to replace Quest pipe?
Most homes are completed in a single day. Larger or more complex homes can take longer.
Can I stay in my home while Quest pipe is replaced?
Yes, always. We shut off water in sections as we work. Then we turn it back on by the end of each work day. You’re never without water overnight.
Can I still make a claim over Quest pipe?
We aren’t attorneys, so we can’t advise on legal claims. The Cox v. Shell Oil settlement was nationwide. InspectApedia reports that the case is now closed. Ask a lawyer about any current options.
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