Looking for a reliable vent storm collar to seal a B-Vent through the roof? This guide highlights top picks that fit standard 3″, 4″, and 5″ pipes and provide weatherproof sealing above the flashing. Best for homeowners replacing a worn collar, installers seeking quick-fit options, and contractors needing durable galvanized steel construction. We compare five well-maired products to help you choose the right size, durability, and installation features for different vent stacks. The summary table below captures the key details you’ll want at a glance.
| Product | |||
|---|---|---|---|
| Water-Tite 81589 Adjustable Type B Vent Storm Collar | 5″ | Galvanized steel | 5″ pipe installations, adjustable fit |
| Water-Tite 81588 Adjustable Type B Vent Storm Collar | 4″ | Galvanized steel | 4″ pipe projects, snug fit with locking tab |
| Water-Tite 81597 Stamped Type B Vent Storm Collar | 3″ | Galvanized steel | 3″ pipe systems, waterproof seal above flashing |
| DuraVent 6BVSC 6 in. B-Vent Storm Collar | 6″ | Galvanized steel | Higher-diameter B-vent applications, weather barrier |
| Selkirk 3-Inch Type B Storm Collar | 3″ | Galvanized steel | Type B gas vent systems and outdoor durability |
Water-Tite 81589 Adjustable Type B Vent Storm Collar
The Water-Tite 81589 fits 5″ pipes and uses 28 gauge G-90 ASTM-A653 galvanized steel. An adjustable slip tab provides a snug fit around the vent, and a locking tab secures installation. Best for 5″ pipe runs with a need for a tight, weatherproof seal directly above the flashing. Use this if your system requires easy adjustability without extra hardware. Caution: verify compatibility with existing flashing and ensure the collar does not obstruct roof clearance.
Water-Tite 81588 Adjustable Type B Vent Storm Collar
The Water-Tite 81588 is designed for 4″ pipes and uses 28 gauge G-90 galvanized steel. It features an adjustable slip tab for a snug fit and a locking tab for secure installation. Best for retrofit projects where a precise 4″ fit is needed. Choose this if you’re replacing an old collar with a simple, tool-free adjustment. Limitation: 4″ only, so incompatible with larger stacks.
Water-Tite 81597 Stamped Type B Vent Storm Collar
The 81597 is a stamped 3″ collar made from 28 gauge galvanized steel. It provides a waterproof seal where the stack passes through the roof and is installed directly above the flashing. Best for small-diameter vent stacks or when a compact storm collar is needed. Choose this if you’re prioritizing minimal intrusion above the roof line. Limitation: 3″ size only, not suitable for larger pipes.
Water-Tite 81601 Stamped Type B Vent Storm Collar
The 81601 stamped collar fits 5″ pipes, using a stamped design for straightforward installation and a waterproof seal where the stack passes through the roof. Best for contractors replacing older 5″ collars and needing a sealed, above-flashing fit. Caution: ensure the new collar aligns with your flashing dimensions to avoid gaps.
Water-Tite 81598 Stamped Type B Vent Storm Collar
The 81598 is a stamped 4″ collar with 28 gauge galvanized steel. It provides a waterproof seal where the stack passes through the roof and is installed directly above the flashing. Best for replacement projects where a stamped, compact collar is preferred for a clean roof line. Limitation: 4″ only, not versatile for larger pipes.
Buying Guide
- Size compatibility: Match the collar to your vent diameter (3″, 4″, 5″, or 6″). Some collars are stamped; others are adjustable. Choose based on pipe size and preferred installation method.
- Material and corrosion resistance: Look for 28 gauge G-90 galvanized steel for durability against weather and outdoor elements.
- Weather seal design: A waterproof seal at the roof line prevents leaks. Some collars install directly above flashing for an added barrier.
- Installation features: Adjustable slip tabs and locking tabs speed up installation and reduce gaps. Consider whether you need a quick retrofit option.
- Compatibility: Ensure the collar works with your type B gas vent system and that dimensions align with your flashing and roof pitch.
Frequently Asked Questions
- What is a Type B vent storm collar? It is a protective adapter that seals and weatherproofs a Type B gas vent as it passes through a roof opening, preventing water intrusion.
- Which size should I choose? Pick the collar that matches the vent diameter: 3″, 4″, or 5″ are common for residential Type B vents; 6″ for larger stacks.
- Are stamped collars as effective as adjustable ones? Both provide waterproof sealing; stamped collars are typically compact, while adjustable ones offer fit flexibility for slightly varying pipe sizes.
- Do I need to replace flashing when installing a storm collar? It depends on the roof kit; some installations use the collar directly above flashing, while others may require flashing replacement for a complete seal.
- Can storm collars prevent all leaks? A properly installed collar greatly reduces leakage at the roof line, but roof flashing, sealant, and flashing home integrity also affect performance.