ACM Galvanized Downspout 3 in. x 4 in. x 10 ft. 26 Gauge White - image 1

ACM Galvanized Downspout 3 in. x 4 in. x 10 ft. 26 Gauge White

Regular price $51.30

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ACM Galvanized Downspout 3 in. x 4 in. x 10 ft. 26 Gauge White


This ACM downspout is a 3 in. x 4 in. rectangular downspout, 10 ft. long, made from 26-gauge galvanized steel with a white finish. It is sold as a single 10 ft. piece. Pair it with matching 3 in. x 4 in. elbows, bands and outlets.


Key Features:

  • 26-gauge steel: Formed from 26-gauge galvanized steel for durability.
  • Rectangular 3x4 size: Standard 3 in. x 4 in. rectangular profile moves high water volume.
  • 10 ft. length: Supplied in 10 ft. lengths to reduce joints on long runs.
  • White finish: Finished in white.
  • Galvanized protection: Galvanized coating helps resist corrosion in exterior service.

Specifications Table:

Specification Details
Brand ACM
Sell unit 1 piece, 3 in. x 4 in. x 10 ft.
Product line ACM Galvanized Downspout
Available colors White
Available sizes 3 in. x 4 in. x 10 ft.
Material Galvanized steel
Color / finish White
Dimensions 3 in. x 4 in. x 10 ft.
Thickness 26 ga

Coverage & How Much You Need:

One piece provides 10 linear ft. of downspout. Measure from the gutter outlet to grade, then add elbows and offsets, and order enough 10 ft. pieces with overlap-friendly fittings to cover the height.

Fit and Compatibility:

Designed for use with 3 in. x 4 in. rectangular downspout fittings, elbows and bands from the ACM gutter line. Gutters and outlet fittings are sold separately.


Frequently Asked Questions (FAQ):

Q: What is included with one order?
A: One 10 ft. length of 3 in. x 4 in. white galvanized downspout.


Q: How many pieces do I need for a two-story run?
A: Measure the drop from gutter to grade; one 10 ft. piece typically covers most single-story runs, with a second piece plus elbow for taller walls.


Q: What gauge is the steel?
A: The downspout is 26-gauge galvanized steel.


Q: Does it resist rust?
A: The galvanized coating is intended to resist corrosion in exterior downspout use.


Q: What fittings does it pair with?
A: Use matching 3 in. x 4 in. elbows, drop outlets and downspout bands.


Expert Verdict — Reviewed by the SuperArbor Pro Desk

A 3 in. x 4 in. downspout is the standard choice for larger 6 in. K-style gutters where roof area demands higher flow capacity than 2 in. x 3 in. handles. Fasten each 10 ft. section to the wall with two bands and slip joints in the direction of water flow to prevent leakage. Keep galvanized steel away from bare copper gutters to avoid galvanic corrosion.

Sheet metal edges are sharp; wear cut-resistant gloves and eye protection when cutting and installing downspouts.


Order the ACM 26-gauge galvanized 3 in. x 4 in. downspout for your next drainage run.

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Subject to Approval & Availability
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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