Attwood Stainless Steel Scupper Valve Barbed – 1-1/2″ Hose Size

Available: 12 - Same Day Shipping (M-F)
Manufacturer: Attwood Marine
Part Number: 66553-3
UPC: 022697665539
PRICE: $65.582 --- MSRP: $99.99 --- Discount 34%


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Stainless Steel Scupper Valve Barbed – 1-1/2″ Hose Size

Polish your image with these beautiful, durable stainless steel fittings. Why specify plastic parts when these fittings will last the life of the boat?

Rugged Stainless Construction:

  • Cast from certified Enhanced 316 Stainless Steel alloy for strength and lifetime corrosion-resistance
  • All visible areas are polished to a mirror finish, then passivate each part for additional protection
  • Thick steel sidewalls withstand continual stress and hose flexing

Faster, Simpler Installation:

  • Each Scupper Valve is available with a new silicone gasket
  • A channel under the flange holds a bead of sealant, making it easier to apply a trouble-free seal
  • All models have wrench flats or an end notch to hold as a gripping surface; one installer can tighten all connections from inside the hull
  • The barbed tail ends provide plenty of room to hold multiple clamps

Stainless Steel Scupper Valves, Barbed:

  • The Scupper Flap is tough neoprene rubber with a molded V that fits into the grooved body to reduce backwash
  • Fasteners are concealed and corrosion-proof


  • Hose size: (inch) 1-1/2″ inner diameter
  • Thread Diameter: (inch) 1-7/8″ 
  • Flange O.D. (outside diameter): (inch) 3″
  • Thread Length: (inch) 3-1/2″
  • Barb Length: (inch) 1-1/2″
  • Total Length: (inch) 5-1/2″
  • Install Hole Saw Size: (inch) 2″ 
  • Thread NPSM: (inch) 1-1/2″
  • Max Hull Thickness: (inch) 3″

*Stainless Steel Thru-Hull Connectors are designed for installation above the water line only

Quick Guide Literature (pdf)
Installation Guide (pdf)
Hose Size 1-1/4"
Material Stainless Steel


Attwood Marine

Attwood Marine
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