Description
Attwood 316 SS Scupper Valve 1-1/2" Barbed | Boat Supply Store
This scupper valve effectively manages water egress, preventing unwanted backflow into your vessel. Constructed from certified Enhanced 316 Stainless Steel alloy with a mirror-polished, passivated finish, it offers superior strength and lifetime corrosion resistance, ideal for coastal or high-salinity environments like the Texas Coast. Its robust design features thick steel sidewalls and a tough neoprene rubber flap with a molded V to minimize splashback, ensuring reliable performance even under continuous stress and hose flexing, with a 3" flange OD and 1-1/2" NPSM thread for secure hull integration.
Key Features
- Lifetime Corrosion Resistance with certified Enhanced 316 Stainless Steel alloy construction.
- Superior Aesthetics from polished mirror finish and passivation treatment.
- Enhanced Durability via thick steel sidewalls resisting stress and hose flex.
- Reduced Backwash achieved through a tough neoprene rubber flap with a molded V.
- Secure Hose Attachment provided by barbed tail ends offering ample grip for multiple clamps.
- Simplified Installation with a new silicone gasket for a trouble-free seal.
- Easy Tightening facilitated by wrench flats or end notch for internal hull access.
- Reliable Water Egress for scuppers installed above the waterline.
Specifications
| Product Specifications | |
|---|---|
| Hose Size | 1-1/2" |
| Thread Diameter | 1-7/8" |
| Flange OD | 3" |
| Thread Length | 3-1/2" |
| Barb Length | 1-1/2" |
| Total Length | 5-1/2" |
| Install Hole Saw Size | 2" |
| Thread Type | 1-1/2" NPSM |
| Max Hull Thickness | 3" |
Who This Is For
Boat owners and marine professionals demanding a premium, long-lasting scupper valve solution that resists harsh marine conditions and maintains aesthetic integrity. Ideal for upgrading older plastic fittings or when superior corrosion resistance is paramount for vessel longevity.
How It Compares
| Feature | Attwood 316 SS Scupper Valve 1-1/2" Barbed | Competitor |
|---|---|---|
| Hose Size | 1-1/2" | 1-1/2" |
| Material | Enhanced 316 Stainless Steel | 316 Stainless Steel |
| Flange O.D. | 3" | 3-1/4" |
| Thread Type | 1-1/2" NPSM | NPSM |
| Scupper Flap Material | Tough Neoprene Rubber | Rubber |
| Finish | Polished to mirror finish, passivated | Polished |
| Installation Aid | Silicone gasket, channel for sealant, wrench flats/notch | Gasket (likely), wrench flats |
Common Concerns Answered
Will this scupper valve be difficult to install and seal properly?
While meticulous installation is key for a perfect seal, the Attwood valve includes a new silicone gasket and design features like wrench flats, significantly simplifying the process and ensuring a trouble-free seal for DIYers.
Are there less expensive options available?
Yes, plastic alternatives exist, but they lack the lifetime corrosion resistance and superior strength of this 316 stainless steel valve, which is engineered for durability and long-term performance in harsh marine environments.
Does the higher price point reflect better performance?
The investment in Attwood's certified Enhanced 316 Stainless Steel alloy, mirror finish, passivated treatment, and robust construction directly translates to superior longevity, corrosion resistance, and aesthetic appeal compared to lower-cost options.
Frequently Asked Questions
What is the maximum hull thickness this scupper valve can accommodate?
This Attwood Stainless Steel Scupper Valve is designed to accommodate a maximum hull thickness of 3 inches.
What type of stainless steel is used in the Attwood Stainless Steel Scupper Valve?
The scupper valve is constructed from certified Enhanced 316 Stainless Steel alloy for superior strength and lifetime corrosion resistance.
What is the recommended hole saw size for installation?
The recommended hole saw size for installing this scupper valve is 2 inches.
Can this scupper valve be installed below the waterline?
No, this scupper valve is specifically designed for above waterline installation to ensure proper function and prevent water ingress when the vessel is underway or at rest.
What is the purpose of the barbed tail ends on this scupper valve?
The barbed tail ends are engineered to provide ample grip for securing multiple hose clamps, ensuring a reliable and leak-free connection to the bilge hose.
