Business Details
50+ Years
experience
Trusted Roof-Mounted Plumbing Vent Flanges
Established in 1908, F J Moore MFG Manufacturing has built a century-long reputation for delivering high-quality plumbing vent flanges that combine innovative design with durable materials. Our patented two-part flange system, introduced in 1918, remains unmatched in reliability, featuring a telescoping design that accommodates roof movement without compromising seals. We prioritize customer satisfaction by eliminating rubber components prone to deterioration, ensuring long-term performance in diverse climates. Our commitment to excellence extends to user-friendly installation processes that save time and labor costs for professionals and homeowners alike.With a legacy rooted in family values and continuous improvement, we offer three specialized vent topsStandard, Frost Resistant, and Olson Vinylto address specific environmental challenges. Our products are engineered to provide a finished aesthetic while maintaining functional superiority, reflecting our dedication to solving real-world roofing issues. Backed by a 10-year written guarantee, our solutions are trusted by contractors and wholesalers across the United States. This enduring focus on quality, innovation, and practicality has solidified our position as a leader in roof-mounted plumbing vent technology.
Services
Plumbing Vent Flanges
Frost Resistant Vents
Olson Vinyl Tops
Copper Products
Custom Fabrication
Details
- Year established: 1908
Highlights and features
- We offer 115 years of continuous family-owned expertise in plumbing vent design.
- Our patented telescoping flanges accommodate roof movement without seal damage.
- No rubber components eliminate deterioration risks from UV exposure and weather.
- 10-year written guarantee ensures long-term product performance confidence.
- Three climate-specific models address frost, seasonal, and temperate conditions.
Services
Plumbing Vent Flanges
Our patented telescoping flanges provide permanent waterproof seals for plumbing vents. The adjustable base accommodates all roof pitches while preventing leaks from expansion or settling. Durable galvanized steel and copper construction outlasts rubber-sealed competitors, with three climate-specific models available for optimal performance in any environment.
Frost Resistant Vents
Engineered for seasonal climates with 3/4-inch air gaps that prevent frost closure. The non-corrosive design maintains pipe airflow in freezing temperatures while resisting ice buildup. Available in galvanized steel and copper options with factory-painted finishes to match roofing materials.
Olson Vinyl Tops
Solvent-welded PVC tops create permanent seals with plastic pipes to eliminate expansion issues. Resists extreme temperature fluctuations from -40F to 160F without cracking. The smooth surface prevents ice accumulation and UV degradation, providing maintenance-free performance in variable climates.
Copper Products
Premium copper flanges offer superior corrosion resistance and aesthetic appeal. Available in standard, frost-resistant, and high-pitch configurations. The natural patina develops over time while maintaining structural integrity, making them ideal for historic or upscale roofing applications.
Custom Fabrication
We manufacture custom flanges for non-standard applications including unique roof pitches and specialized materials. Our team works directly with contractors to develop solutions for complex installations, ensuring proper fit and performance where off-the-shelf products won't work.
Questions
What makes F.J. Moore flanges different from competitors?
Our patented telescoping design eliminates rubber seals that crack over time, and our Olson Vinyl Top bonds permanently with PVC pipes for expansion control.
Do I need to remove old shingles for installation?
No, our flanges install without removing existing shingles or vent pipes, saving time and labor costs.
Are products available in different materials?
Yes, we offer galvanized steel, copper, and factory-painted options in multiple colors to match roofing aesthetics.
How do I determine the correct flange size?
Measure your plumbing pipe's inside diameter (2-6 inches) and roof pitch using our downloadable instructions.
What warranty do you offer?
We provide a 10-year written guarantee when products are properly installed according to our specifications.
Can I order directly from F.J. Moore?
Yes, online orders ship nationwide, or contact our Upper Midwest wholesalers for local availability.
