SeaTech 5/8" Stem X 1/2" MNPT - white plastic fitting with larger smooth stem and smaller male threaded end for connecting tubing to threaded ports in marine or RV plumbing systems
SeaTech 5/8" Stem X 1/2" MNPT - white plastic fitting with larger smooth stem and smaller male threaded end for connecting tubing to threaded ports in marine or RV plumbing systems
Seatech

208555- ADAPTER, 5/8" STEM X 1/2" MNPT, SEATECH

Part #: 208555
Login / Register

The 5/8″ Stem × 1/2″ Male NPT Adapter is designed for quick and secure transitions between plug-in stem tubing connections and standard threaded plumbing systems. The 5/8″ stem provides a fast, push-in style connection with compatible fittings, while the 1/2″ MNPT thread integrates easily with valves, manifolds, and other NPT components.

Constructed from durable, corrosion-resistant polymer, this adapter ensures long-lasting performance in residential, commercial, and light industrial water treatment systems. It is ideal for applications requiring a reliable stem-to-thread transition in compact or tight installation spaces.

 

Features:

  • 5/8″ plug-in stem connection
  • 1/2″ male NPT outlet Durable, corrosion-resistant construction
  • Provides secure stem-to-thread transition
  • Tool-free stem insertion
  • Compatible with standard fittings and tubing
  • Suitable for residential and commercial water systems

Inlet Connection Size: 1/2 IN

Inlet Connection Type: Push to connect

Inlet Material: Polysulfone

Outlet Connection Size: 1/2 IN

Outlet Connection Type: Male Threaded

Outlet Material: Polysulfone

Outlet Thread Type: NPT

Q&A

Have a Question?

Be the first to ask a question about this.

Ask a Question

NEED HELP?

Need help finding a replacement part? Fill out our part request form and someone will get back to you shortly. Can’t wait? You can also call our customer support line.