Large Stack Gasket – 3-1/2" x 19" | 631219 | B-57 Big Stack Gasket

Large Stack Gasket – 3-1/2" x 19" | 631219 | B-57 Big Stack Gasket
Seal uneven stove-to-stack connections with the 631219 Large Stack Gasket. Designed for use with the 9S17312 transition stack (3-1/2" x 17" x 8" round), this high-temperature fiberglass gasket ensures a tight, leak-proof seal between your stove and flue system. Ideal for installations where precision sealing is critical to performance and safety.

Key Features:
✅ OEM Fit – Designed to fit the 9S17312 transition stack
✅ High-Temp Fiberglass – Durable material withstands high heat and pressure
✅ Air-Tight Seal – Helps prevent smoke leaks and improve stove draft
✅ Easy Installation – May require T-bolts or tie-downs for secure mounting

Product Specifications:
📌 Part Number: 631219
📌 Also Known As: B-57 Big Stack Gasket
📌 Inner Dimensions: 3-1/2" x 17"
📌 Outer Dimensions: 4-5/8" x 19"
📌 Material: Heat-resistant fiberglass
📌 Application: Stack-to-pipe transition seal

Compatible With the Following Stove Brands:

• Buck

• Craft

• Carolina

• Appalachian

• Hawke

• Lilly Stoves

• Silent Flame

• Squire

• Long Manufacturing

• And many others—check your owner’s manual for part number compatibility

When to Replace:

• During new stove or stack installation

• If the current gasket is cracked, worn, or leaking

• As part of routine maintenance to maintain proper sealing

Ensure a safe, efficient seal with the 631219 Large Stack Gasket. Order today for a reliable fit and improved heating performance!