Galvanized Plumber’s Pipe Flashing, 4 in (7/12–12/12 Pitch) 15 in x 16 in Base Flange

Regular price $70.75

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Galvanized 4-inch plumber’s pipe flashing

This galvanized plumber’s pipe flashing helps create a watertight transition where a pipe penetrates a steep-slope roof. Built from durable galvanized steel with a wide flange for alignment, it’s designed for 7/12–12/12 roof pitches and a 4-inch pipe opening.


Key Features:

  • Watertight Roof Penetration: Helps flash around plumbing/vent pipes to reduce leak risk at the roof deck.
  • Durable Galvanized Steel: Metal construction designed for exterior roofing exposure.
  • Steep-Slope Fit: Intended for roofs in the 7/12–12/12 pitch range for proper pipe angle alignment.
  • Wide Base Flange: Large flange footprint supports positioning and integration with roofing materials.
  • No Field Trimming Required: Designed to install without cutting the flashing to fit.

Specifications Table:

Specification Details
Product name Galv Plumbers Flsh 4.0 12/12 Shk ML
Category Flashing
Sub-category Roof Boots, Roof Jacks & Pipe Base Flashing
Description Galvanized Plumbers Flashing 4.0" 12/12 Shake Mill
Unit of measure Piece (PC)
Pipe size 4 in
Roof pitch compatibility 7/12–12/12
Material Galvanized steel
Gauge 28 gauge
Flange/base size (F) for 4 in model 15 in x 16 in
Dimension D for 4 in model 4 1/8 in
Dimension H for 4 in model 4 in

Frequently Asked Questions (FAQ):

Q: What pipe size does this flashing fit?
A: It’s sized for a 4-inch pipe opening (4 in).


Q: What roof pitches is this flashing intended for?
A: Steep-slope applications in the 7/12–12/12 pitch range.


Q: What is it made from?
A: Galvanized steel (listed as heavy-duty 28-gauge galvanized steel in supplementary product data).


Q: Do I need to trim it to install?
A: No—this style is designed so no field trimming is required for installation.


Q: What is the base flange size for the 4-inch model?
A: For the 4-inch size, the flange (F) is shown as 15 in x 16 in.


A crisp, architectural finish for every roofline detail

There’s something undeniably refined about well-resolved transitions—this galvanized pipe flashing turns a necessary roof penetration into a clean, intentional architectural moment. The sharp geometry and generous flange read like tailored metalwork, giving the roofline a quieter, more considered finish. Pair it with complementary metal accents—gutter details, chimney caps, or hardware—to create a cohesive exterior story. It’s the kind of behind-the-scenes essential that elevates durability into design confidence.


Choose the 4-inch galvanized plumber’s pipe flashing to seal steep-slope roof penetrations with a clean, durable fit.

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All orders are reviewed before fulfillment. You are not charged until your order is approved and ready to ship — and you may cancel at any time before that at no cost.

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