John Guest 1/8" Female NPT X 1/4" Push Connect Adapter
John Guest 1/8" Female NPT X 1/4" Push Connect Adapter is a reliable fitting designed to convert 1/8 inch male NPT threaded connections to standard 1/4 inch push connect tubing. Ideal for use with Neptune Systems DOS and RO tubing setups, this adapter ensures a secure, leak-free connection for dosing and water change applications. John Guest 1/8" Female NPT X 1/4" Push Connect Adapter features durable polypropylene construction, an EPDM O-ring, and is NSF certified, making it perfect for clean, organized and professional aquarium plumbing setups.
John Guest 1/8" Female NPT X 1/4" Push Connect Adapter
This John Guest Female NPT x Push-Connect Adapter can be used to adapt any 1/8” male NPT threaded plumbing to 1/4” push connect, and is perfect for converting your Neptune Systems® DOS to accept standard 1/4” RO tubing. This adapter can be used to replace the compression fittings on the DOS, threading directly onto the 1/8” threads and providing a leak-free connection.
RO tubing is a great option for longer tubing runs, and we’ve used this option for applications such as remote automatic water change reservoirs and drain lines. Coupled with the Neat Aquatics 1/4” RO Tubing Brackets, you can keep your tubing clean, organized and out of the way, and achieve a truly professional-looking setup.
Features
- White polypropylene construction
- EPDM O-ring
- FDA approved material
- NSF Certified 51 & 61
What’s Included?
1x John Guest 1/8 inch FNPT X 1/4 inch Push-Connect Adapter

