Famco Flue Liner Replacement Nationwide

Famco Flue Liner Replacement: The Waltham Owner’s Guide

We stock and install Famco-compatible flue liner replacement in Waltham, with most jobs running $1,800 to $3,400 installed depending on height, diameter, and whether the existing liner pulls clean or has shifted. We carry the common Famco sizes on our trucks, and most Waltham replacements are completed in a single visit once we’ve camera-inspected the flue. You’ll usually discover the problem when smoke backs up into the room, you spot rust flakes in the firebox, or a Level-2 inspection reveals gaps or corrosion the camera can see.

Call (781) 905-8338

Which Famco Models This Applies To

Famco manufactured several liner series over the years, and the right replacement depends on which generation is in your chimney. The earlier Famco single-wall stainless liners, common in Waltham homes built from the late 1970s through the 1990s, carry part numbers starting with FL- and were sold in 6-inch, 7-inch, and 8-inch diameters. The later Famco ProFlex and Famco UltraFlex lines switched to a corrugated, multi-wall design with a different collar connection at the top plate. Check the stamped label near the cleanout tee, or the metal tag on the upper termination if it’s still legible after years of heat cycling.

We are an independent service provider, not affiliated with Famco. For the FL-series, we typically source OEM-equivalent 316Ti stainless from our regular suppliers, which matches Famco’s original alloy spec and carries the same UL 1777 listing. The ProFlex and UltraFlex lines sometimes require adapter collars we fabricate on-site, since Famco’s proprietary twist-lock termination is no longer stocked by most distributors. We measure the flue length with a weighted tape, verify the chimney pot or crown opening, and confirm the appliance BTU rating before ordering anything. A mismatch here means a second trip, and we don’t make second trips on the customer’s dime.

Signs Your Famco Flue Liner Replacement Is Failing

• Smoke spillage when you open the firebox door. This usually means the Famco liner has developed a gap at a joint, or the stainless has corroded through in a section. The flue is no longer drafting as a sealed column, and exhaust is finding its way out through the breach before it reaches the top.
• Rust-colored staining on the exterior masonry below the roofline. When a Famco liner fails near the top, condensation mixed with creosote seeps through the mortar joints. In Waltham’s freeze-thaw climate, this accelerates crown and brick deterioration, so the stain is both symptom and warning of secondary damage.
• Chunks of metal or flaky rust in the firebox or cleanout. Famco’s single-wall liners were 304 stainless in some production runs, not 316Ti, and they degrade from the inside out where acidic condensation attacks the metal. What you’re seeing is the liner wall thinning and shedding material.
• A whistling or roaring draft sound that wasn’t there before. This often indicates the Famco liner has pulled away from the top plate or thimble, creating an open gap. The sound is air being drawn through the wrong path, and it means combustion gases may be entering wall cavities.
• Your heating appliance shuts down or performs poorly. Oil and gas appliances with Famco liners rely on proper draft pressure. A breached liner throws off the air-fuel mixture, causing sooting, carbon buildup, or safety shutoffs on modern units.

Replacement Cost & What’s Included

In Waltham, a full Famco flue liner replacement typically runs $1,800 to $3,400. The lower end covers a straight 6-inch run in a single-story ranch with good roof access and a liner that pulls out cleanly. The upper end applies to taller chimneys, offset flues that need an insulated liner kit, or jobs where the existing Famco liner has shifted and must be cut out in sections. Every estimate includes the Level-2 camera inspection with photos you can see, the plain-English verdict, removal of the old liner, installation of the new 316Ti stainless liner with proper top and bottom connections, and a post-installation draft test.

We give you the full number before we start. The 90-Day Done Right Promise covers the installation in writing with no arguing. If the draft test doesn’t read right, we come back. That’s the Keystone Standard we’ve worked under since 1984.

DIY or Call Us?

There’s a short list of things a Waltham homeowner can safely check: confirm the damper opens fully, look for obvious debris at the firebox, and verify the cleanout door is sealed. Beyond that, flue liner replacement involves working on a steep roof, handling heavy stainless in a confined vertical space, and sealing combustion connections that affect carbon monoxide safety. The old Famco liner often binds on mortar protrusions or offset joints, and forcing it can damage the chimney structure or leave a stuck section blocking the flue. We don’t recommend it.

Our technicians are background-checked and uniformed, and they carry the extraction tools and adapter fittings for Famco systems on every truck. Most replacements are done in one visit. Call (781) 905-8338 and we’ll schedule a camera inspection. You’ll see what we see, and we’ll tell you straight whether it needs doing now or can wait.

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