Skip links


Tube Stem Plug Acetal Fitting
Works with ALL standards 1/4″ O.D. tubing.
Made from the highest quality Acetal (Polyoxymethylene (POM)) plastic.
Comparable to Parker Plug Union 1/4″ (A4TPL)
Tube Stem Plug 1/4″

Acetal Fitting – 1/4″ Tube Stem: Plug RO – CWF-APL04 (A4TPL), the perfect solution for your fluid system needs. Crafted with precision, this fitting ensures a secure and leak-free connection. Its 1/4″ tube stem size makes it versatile for various applications, while the Plug RO design offers a quick and convenient shut-off solution. Made from high-quality acetal material, it’s both durable and resistant to corrosion, ensuring a long-lasting performance.

Universal Compatibility: No matter your RO system’s make or model, our Acetal Fitting is designed to adapt. It offers versatility and reliability, ensuring it’s the right fit for your specific needs.

Premium Quality: Crafted from high-quality Acetal material, this fitting is durable, corrosion-resistant, and built to last, making it an excellent investment for your RO system.

Perfect Fit: The 1/4″ Tube Stem Plug is designed for easy and secure connections, ensuring a leak-free operation, while the RO system purifies water effectively.

Easy Installation: This fitting is user-friendly and can be effortlessly installed by anyone, even if you’re not a plumbing expert. No special tools or professional assistance required.

RO System Compatibility: Whether you have a home or commercial RO system, our Acetal Fitting is compatible with various RO models, offering versatility and reliability.

Peace of Mind: By preventing leaks and maintaining the system’s structural integrity, this fitting gives you peace of mind, knowing that your water filtration is working at its best.

The Coastal Water Filters Acetal Fitting with a 1/4″ Tube Stem Plug for reverse osmosis (RO) systems offers a reliable and effective solution for sealing and connecting tubing in water filtration applications. Its durable acetal construction ensures long-lasting performance and resistance to corrosion. This fitting is a valuable addition to any RO system with its secure and leak-free connections.

Additional information


Coastal Water Filters

Compatible Brand






Item Diameter


Compatible Model

Plug Union 1/4" (A4TPL)


POM, Acetal


There are no reviews yet.

Be the first to review “Coastal Water Filters Acetal Fitting -1/4″ Tube Stem Plug RO CWF-APL04”

Your email address will not be published. Required fields are marked *

This website uses cookies to improve your web experience.