1/2" Male Thread to 1 1/4" Male Thread adapter

Product Description

Upgrade your marine plumbing system with our USA-made 1/2" Male Pipe Thread to 1 1/4" Male Pipe Thread (MPT to MPT) Adapter—crafted for unmatched durability and corrosion resistance. Manufactured from high-strength engineered marine composite, this straight adapter is built to endure the toughest boating environments, offering outstanding resistance to UV damage, saltwater, extreme weather, and general wear over time.

Designed for universal compatibility, our adapter features tapered male pipe threads, making it ideal for seamless connections with plastic, brass, or stainless steel fittings used in boat plumbing systems, seacocks, livewell systems, bilge pumps, and thru-hull assemblies. The hexagonal center provides superior grip, simplifying the installation process while ensuring a secure, leak-free seal every time.

At just 1.70 inches in length, this compact yet rugged adapter is a go-to solution for any marine plumbing repair or upgrade. Whether you're replacing deteriorated fittings or adding new components to your system, this marine-grade straight MPT fitting makes the job quicker and easier.

Used by boaters and marine professionals alike, this adapter is compatible with products from brands like Groco, Perko, Attwood, and Forespar, making it a versatile part for retrofits and upgrades across numerous boat models.

Trust in American-made quality and choose a fitting that’s built for reliability, performance, and longevity. Upgrade your boat today with our 1/2" Male Pipe Thread to 1 1/4" Male Pipe Thread Straight Adapter and sail confidently, knowing your plumbing is secure.

Specifications 

• Type: Straight Adapter – Male Pipe Thread (MPT) to Male Pipe Thread (MPT)

• Thread Size: 1/2" MPT × 1 1/4" MPT (tapered male pipe threads)

• Overall Length: 1.70 inches

• Material: High-strength engineered marine composite

• Design Feature: Hex-shaped center section for easy tightening

• Country of Origin: Proudly Made in the USA

• Compatibility: Fits most plastic, brass, and stainless steel marine plumbing parts