Attwood Plastic Thru-Hull Fitting – 1-1/2" White delivers durable, corrosion-resistant performance for above-waterline boat plumbing. Built from tough polypropylene, it protects the hull and minimizes electrolysis for reliable, long-lasting service on the water. 
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Material: Polypropylene (thermoplastic) with corrosion-resistant properties
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Color: White
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Fits Hose Size: 1-1/2" I.D.
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Stem Length: 3-1/2"
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Max Hull Thickness: 1-1/4"
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Flange Diameter: 3"
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Installation Hose Size: 1-7/8" to 2"
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Installation Type: Optimized for above-waterline installations
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Manufacturer / Part: Attwood, 3875-3
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Notes: Prop 65 warning applies
The thru-hull provides a secure, leak-free connection for above-waterline plumbing. The corrosion-resistant polypropylene construction helps minimize electrolysis, while the 3" flange and 1-1/4" hull-thickness capacity ensure a robust seal. Hose routing from 1-7/8" to 2" offers flexible installation on a wide range of boats, and the 1-1/2" I.D. size keeps your plumbing compact and efficient. The clean white finish looks at home on most hull colors and stands up to salt, splash, and sun. Ideal for both maintenance and new installations, it’s a dependable, easy-to-install choice for keeping your vessel’s plumbing leak-free. Note: California Prop 65 warning applies.