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Attwood Marine 3881-1 Thru-Hull Scupper Assembly with Flapper Valve 1-1/2 Inch White

Manufacturer

Attwood Marine

Picture for manufacturer Attwood Marine

Part Number

3881-1
20 reviews
04/06/2036 4:57 PM
Sale Price

$20.37

In Stock (10+)

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Usually delivered within 2 days

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Product Details

The Attwood Marine 3881-1 is a complete thru-hull scupper assembly designed for efficient bilge water drainage on boats. This pre-assembled unit combines the popular 3876 scupper with a 3875B 1-1/2 inch thru-hull fitting for convenient installation.

Key Features:

  • Complete assembly ready to install - no separate components needed
  • Integrated flapper valve opens outward to discharge water overboard
  • Self-closing valve helps prevent backwash and water intrusion
  • High-impact corrosion-resistant white plastic construction
  • 1-1/2 inch hose connection size for standard bilge drainage systems
  • Marine-grade materials withstand harsh saltwater environments

This thru-hull scupper is ideal for draining cockpit water, livewells, or bilge pump discharge. The one-way flapper valve automatically opens under water pressure and closes when flow stops, preventing seawater from entering the boat through the drain line. The durable white plastic finish resists corrosion and UV damage for long-lasting performance in marine applications.

Products specifications

Diameter

2-7/8"

Install Hole Saw Size

2"

Length

6-1/4"

Product Type

thru-transom with scupper

Size

6-1/4"

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Part correct

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