T-H Marine SA-2B Flush Mount Scupper Valve Assembly with Curl-Proof Flapper for 1 to 1.25 Inch Drain Tubes

The T-H Marine SA-2B is a flush mount scupper valve assembly built to keep water moving out of the boat and not back in. It uses a durable thermo-plastic flapper engineered to resist curling and warping from sun exposure and chemical contact, so the flapper keeps its shape and maintains a secure seal trip after trip. The flapper is finished in black and sits inside a white frame for a clean, finished look on deck.

Installation is straightforward: the assembly mounts over an existing drain tube or connects directly to a 1.5 inch thru hull using just four screws. It is compatible with drain tubes ranging from 1 inch up to 1.25 inches, which covers a wide range of boat setups, and its grooved interior is designed to fit securely over drain flanges for a watertight seal. The hole pattern is also designed to support retrofitting other manufacturers' rubber flapper assemblies, making the SA-2B a practical replacement option when an existing scupper flapper has failed.

With one port and a flush mount design on both the inlet and outlet, the SA-2B is intended as a simple, reliable drain valve upgrade for boats needing dependable self-bailing performance without unwanted water intrusion.

Specifications

• Brand: T-H Marine
• Manufacturer Part Number: SA-2B
• Item Type: Scupper Valve
• Material: Plastic (Thermo-plastic)
• Color: White Frame / Black Flapper
• Item Dimensions (L x W x H): 2.9 x 2.9 x 0.7 inches
• Inlet Connection Size: 1.5 inches
• Inlet Connection Type: Flush Mount Adapter
• Outlet Connection Size: 1.25 inches
• Outlet Connection Type: Flush Mount Adapter
• Thread Size: 1.5 inches
• Thread Type: NPT
• Number of Ports: 1
• Drain Tube Compatibility: 1 inch to 1.25 inches
• Included Components: Flapper
• Weight: 0.07 pounds
• UPC: 733572039207
• Warranty: 1 year manufacturer

Frequently Asked Questions

What size drain tubes does the SA-2B fit? The T-H Marine SA-2B accommodates drain tubes ranging from 1 inch up to 1.25 inches, and it can also be connected directly to a 1.5 inch thru hull.

How is the SA-2B scupper valve installed? It mounts over an existing drain tube or onto a 1.5 inch thru hull using four screws, making it a straightforward installation without special tools.

Will this scupper valve work as a replacement for an existing flapper assembly? Yes, the SA-2B's hole pattern is designed to support retrofitting other manufacturers' rubber flapper assemblies, so it can serve as a replacement when an existing scupper flapper wears out.

What is the flapper made of? The SA-2B uses a durable thermo-plastic flapper engineered to resist curling and warping from sun and chemical exposure, helping it maintain a secure seal over time.

What are the overall dimensions of the SA-2B? The T-H Marine SA-2B measures 2.9 x 2.9 x 0.7 inches.

How much does the SA-2B weigh? The SA-2B scupper valve assembly weighs 0.07 pounds.

What color is the SA-2B scupper valve? It has a white frame paired with a black flapper.

Does the SA-2B come with the flapper included? Yes, the flapper is included as part of the SA-2B scupper valve assembly.

How many ports does this scupper valve have? The SA-2B is a single-port scupper valve.

What thread type does the SA-2B use? The SA-2B uses a 1.5 inch NPT thread.

Is the SA-2B watertight once installed? Yes, its grooved interior is designed to fit securely over drain flanges, providing a watertight seal once installed.

What warranty comes with the T-H Marine SA-2B? The SA-2B is backed by a 1 year manufacturer warranty.