Preway Chimney Pipe Problems? Your Ultimate Guide to Safety & Replacement
Many homes cherish the warmth and ambiance of a Preway fireplace, a popular brand from a bygone era. However, with age comes a critical concern that often goes unnoticed until it’s too late: the deteriorating condition of the original Preway chimney pipe.
Since Preway is no longer in business, finding original replacement parts is nearly impossible, leaving many homeowners with an aging, potentially hazardous chimney system hidden within their walls. This guide addresses the serious risks associated with outdated Preway chimneys and provides a clear, actionable path to securing your home with a modern, safe replacement.
You'll Learn About
What Makes Preway Chimney Pipe a Unique Challenge?
Preway Inc. was a significant manufacturer of zero-clearance fireplaces, which are prefabricated metal fireboxes that can be installed safely near combustible materials like wood framing. These systems relied on a specific, proprietary chimney pipe designed to work in tandem with the fireplace unit. Typically, this was a double-wall or triple-wall pipe that used air circulation between the layers for cooling.
The problem is that these pipes were designed as a complete system with the firebox. You cannot simply attach a standard modern chimney pipe to an old Preway fireplace without critical modifications. The connection points, locking mechanisms, and required clearances are all specific to the original Preway design, creating a significant challenge for repairs or replacement.
The Ticking Time Bomb: Critical Preway Chimney Pipe Issues
An old, uninspected Preway chimney pipe can pose severe risks to your home and family. The materials and construction standards of several decades ago are no match for today’s advanced, safer technologies. Ignoring these potential issues is a gamble no homeowner should take.
Corrosion and Rust: The Silent Killers
Over the years, exposure to moisture from rain, snow, and condensation causes the metal pipe sections to rust. This corrosion is most common at the joints between pipe sections and at the chimney cap. Once the metal is compromised, it can lead to dangerous flue gas leaks, including deadly carbon monoxide, into your living spaces.
Structural Failure and Creosote Buildup
Corrosion weakens the structural integrity of the chimney pipe. A weakened pipe is more susceptible to damage from minor chimney fires or even strong winds. Furthermore, all wood-burning systems produce creosote, a flammable, tar-like substance that builds up inside the flue. A damaged or improperly functioning liner allows creosote to accumulate more rapidly, dramatically increasing the risk of a destructive chimney fire.
Outdated Safety Standards
Modern chimney systems are built to stringent safety standards, such as the UL 103 HT rating, which certifies they can withstand high temperatures, including chimney fires. Older Preway pipes may not meet these current codes. Continuing to use an unlisted, outdated system can create serious safety hazards and may even impact your homeowner’s insurance coverage in the event of a fire.
Your Step-by-Step Inspection Guide: What to Look For
A thorough visual inspection can help you identify potential warning signs with your Preway chimney. While a professional inspection is always recommended, you can start by looking for these key indicators. Always use a powerful flashlight and wear appropriate safety gear.
Begin your inspection from inside the firebox, looking up into the first section of the flue for any visible rust, warping, or disconnected joints. Next, check the attic space where the chimney passes through. Look for any black streaks (soot), rust stains on the pipe, or water damage on the surrounding wood framing. Finally, from the ground outside, inspect the chimney housing and the cap on the roof for signs of rust, deterioration, or missing components.
| Symptom | Possible Cause | Recommended Action |
|---|---|---|
| Dark stains on the ceiling or walls near the chimney | Water leak from damaged flashing or a rusted chimney section. | Call a certified chimney professional immediately. Water intrusion can cause structural damage and mold. |
| Visible rust or corrosion on pipe sections (especially in attic) | Age, moisture exposure, or a damaged chimney cap. | The pipe’s integrity is compromised. Plan for a full replacement. |
| Smoke or unusual odors in the home during a fire | A leak in the chimney pipe or a blockage. | Extinguish the fire immediately and do not use the fireplace until it has been professionally inspected. |
| Flakes of metal or rust in the firebox | Deterioration of the inner wall of the chimney pipe. | This is a clear sign of internal corrosion. The system is unsafe to use. |
The Solution: Safely Replacing Your Preway Chimney Pipe
Because original Preway parts are unavailable, a repair is not a safe or viable option for a failing system. The definitive solution is a complete replacement of the old chimney pipe with a modern, certified Class A chimney system. This is a complex job that requires professional expertise to ensure safety and code compliance.
Understanding Modern Chimney Pipe Systems
Today’s chimney pipes offer vastly superior safety and performance. Look for systems from reputable brands that are listed to UL 103 HT standards. These are typically double-wall insulated pipes with a stainless steel inner liner that resists corrosion and withstands high temperatures.
These systems are designed with secure locking bands that create a tight, safe seal at every joint, preventing leaks. The insulation packed between the inner and outer walls keeps the exterior of the pipe cooler, allowing for reduced clearances to combustible materials, a critical safety feature in any home.
The Critical Fireplace-to-Chimney Connection
The single most challenging aspect of this project is adapting the new chimney system to the old Preway firebox. A custom-made adapter or anchor plate is often required to create a secure and properly sealed connection at the firebox outlet. This is not a standard, off-the-shelf part.
This connection is absolutely crucial for the safety of the entire system. An improper connection can leak dangerous gases or fail under high heat. This is a primary reason why this replacement should only be handled by a certified chimney technician with experience in retrofitting older fireplaces.
Planning Your Replacement Project
A professional will begin by carefully measuring the diameter of your Preway firebox outlet and the total height needed to clear your roofline according to modern building codes. Such a significant home improvement project often requires local permits. You might be wondering, do I need a permit for this type of renovation? The answer is almost always yes, as it involves fire safety and structural modifications.
Ensuring the safety and longevity of your home often involves multiple updates. While focusing on the fireplace, homeowners often consider other upgrades to enhance property value and functionality, such as remodeling a bathroom where you might compare fixtures like the Kohler Highline Arc vs Elmbrook toilets.
Beyond the Pipe: Essential Preway Fireplace Maintenance
Once you have a new, safe chimney system installed, regular maintenance is key to its longevity. Schedule an annual inspection and cleaning with a Chimney Safety Institute of America (CSIA) certified sweep. They will remove flammable creosote and inspect the firebox, damper, and the new chimney for any signs of wear.
Proper home maintenance extends beyond the fireplace. Just as you’d prepare your property for winter by ensuring your Yard King 8/27 snowblower is ready for action, regular attention to your chimney system prevents small issues from becoming costly, dangerous problems.
Frequently Asked Questions About Preway Chimney Systems
Navigating the issues of an obsolete fireplace system can be confusing. Here are answers to some of the most common questions from homeowners.
Can I just repair my old Preway pipe instead of replacing it?
Unfortunately, no. Due to the lack of available parts and the outdated materials, attempting to patch or repair a corroded Preway pipe is not a safe or lasting solution. Replacement is the only responsible course of action to ensure the safety of your home.
How much does it cost to replace a Preway chimney?
The cost can vary significantly based on factors like the height of your chimney, the complexity of the installation, and local labor rates. A typical replacement can range from a few thousand to several thousand dollars. Always get multiple quotes from certified professionals.
Where can I find a professional qualified for this job?
Look for chimney technicians who are certified by nationally recognized organizations like the Chimney Safety Institute of America (CSIA) or the National Fireplace Institute (NFI). These professionals have the training and experience required to handle complex installations and ensure everything is up to code.
Owning a home with a Preway fireplace doesn’t have to be a source of worry. By understanding the risks associated with the original Preway chimney pipe and taking proactive steps to replace it with a modern system, you can continue to enjoy your fireplace safely for years to come. Don’t wait for a failure; an inspection today can provide peace of mind and protect your most valuable asset.
