ACM Galvanized Plumbers Flashing, 1 in. to 4 in. Pipe Sizes, Mill Finish

ACM Plumbers Flashing is a galvanized steel pipe base flashing for sealing vent pipe penetrations on shingle roofs. The line covers 1 in., 2 in., 3 in. and 4 in. pipe openings in mill finish. Each variant is sold per piece, so order one flashing per penetration and pair it with the appropriate roof boot or pipe collar.

Key Features:

• Galvanized steel: Made from galvanized steel for corrosion resistance on exterior roof penetrations.
• Four pipe sizes: Offered in 1 in., 2 in., 3 in. and 4 in. pipe openings to match common vent lines.
• Mill finish: Supplied in mill finish, ready to be left exposed or painted.
• Base flashing design: Formed as pipe base flashing that laps into shingle courses at roof penetrations.
• Sold per piece: Each flashing is sold individually as a piece for easy quantity matching to the job.
• Vent pipe use: Intended for plumbing vent stacks, roof jacks and similar pipe penetrations.

Specifications Table:

Coverage & How Much You Need:

One flashing covers a single pipe penetration. Choose the size closest to the actual pipe outer diameter, typically matching the nominal vent size.

Fit and Compatibility:

Pairs with plumbing vent pipes and standard roof jack or boot assemblies on shingle roofs. Pipe collars, boots and sealants are sold separately.

Frequently Asked Questions (FAQ):

Q: What is included with each order?
A: One galvanized plumbers flashing piece in the selected pipe size and mill finish.

Q: How do I choose the right size?
A: Select the flashing whose pipe opening matches the vent pipe size; sizes of 1 in., 2 in., 3 in. and 4 in. are available.

Q: How is it installed?
A: Slide the flashing over the pipe and lap the flange into the shingle courses following standard pipe base flashing practice, sealing as required.

Q: Will it rust?
A: It is galvanized steel, which resists corrosion in typical exterior roofing exposure.

Q: How many do I need?
A: Order one piece per pipe penetration.

Expert Verdict Reviewed by the SuperArbor Pro Desk

Match the flashing opening to the pipe diameter rather than sizing up, since an oversized opening leaves a gap to seal. On re-roofs, replace aged base flashings while the shingles are off. Mill finish galvanized can be painted to blend with the roof.

Work carefully on pitched roofs and wear gloves, as flashing edges can be sharp.

Order ACM galvanized plumbers flashing in the pipe size your vent stack requires.