John Guest - Polypropylene Stem Adapter Fitting - White
Polypropylene Stem Adapter Fitting
White quick-connect stem adapter for threaded connections. Push-to-connect on one side, NPT thread on the other. Designed and manufactured in the United Kingdom by John Guest Speedfit.
Grip-and-seal collet design for reliable connections
Dual Connection
One side inserts into quick connect fittings, the other side provides NPT threaded connection for taps, toilets, and appliances.
Push-to-Connect
Simply push the fitting fully onto the pipe and turn onto the thread. No tools required for installation.
Quick Release
To demount, unlock the nut, push the collet towards the body, and pull the pipe to release. Designed for repeated connection cycles.
UK Engineering
Designed, manufactured and assembled in the United Kingdom by John Guest Speedfit using high-grade polypropylene materials.
Understanding National Pipe Thread measurements
NPT sizing does not match ruler measurements. A 1/4" NPT thread measures approximately 0.540 inches in actual diameter, not 0.25 inches. This is critical for proper fitment. Reference: 1/8" NPT = 0.405" actual diameter, 1/4" NPT = 0.540", 3/8" NPT = 0.675", 1/2" NPT = 0.840". Always verify thread size before ordering.
Works with John Guest quick-connect systems
Compatible with John Guest Speedfit quick-connect fittings and tubing systems. Ideal for connecting reverse osmosis systems, water filtration equipment, ice makers, refrigerators, and appliances requiring NPT threaded connections. Female coupler design allows connection to taps, toilets, and other fixtures with male NPT threads.
No Tools Required
Hand-tighten installation with push-to-connect convenience
Reusable Design
Quick-release collet allows repeated connection and disconnection
Grip-and-Seal
John Guest collet arrangement ensures secure, leak-free connections
UK Quality
Manufactured to John Guest Speedfit standards in the United Kingdom
Polypropylene Stem Adapter Fitting
White quick-connect stem adapter for threaded connections. Push-to-connect on one side, NPT thread on the other. Designed and manufactured in the United Kingdom by John Guest Speedfit.
Grip-and-seal collet design for reliable connections
Dual Connection
One side inserts into quick connect fittings, the other side provides NPT threaded connection for taps, toilets, and appliances.
Push-to-Connect
Simply push the fitting fully onto the pipe and turn onto the thread. No tools required for installation.
Quick Release
To demount, unlock the nut, push the collet towards the body, and pull the pipe to release. Designed for repeated connection cycles.
UK Engineering
Designed, manufactured and assembled in the United Kingdom by John Guest Speedfit using high-grade polypropylene materials.
Understanding National Pipe Thread measurements
NPT sizing does not match ruler measurements. A 1/4" NPT thread measures approximately 0.540 inches in actual diameter, not 0.25 inches. This is critical for proper fitment. Reference: 1/8" NPT = 0.405" actual diameter, 1/4" NPT = 0.540", 3/8" NPT = 0.675", 1/2" NPT = 0.840". Always verify thread size before ordering.
Works with John Guest quick-connect systems
Compatible with John Guest Speedfit quick-connect fittings and tubing systems. Ideal for connecting reverse osmosis systems, water filtration equipment, ice makers, refrigerators, and appliances requiring NPT threaded connections. Female coupler design allows connection to taps, toilets, and other fixtures with male NPT threads.
No Tools Required
Hand-tighten installation with push-to-connect convenience
Reusable Design
Quick-release collet allows repeated connection and disconnection
Grip-and-Seal
John Guest collet arrangement ensures secure, leak-free connections
UK Quality
Manufactured to John Guest Speedfit standards in the United Kingdom
Original: $1.13
-65%$1.13
$0.40Description
Polypropylene Stem Adapter Fitting
White quick-connect stem adapter for threaded connections. Push-to-connect on one side, NPT thread on the other. Designed and manufactured in the United Kingdom by John Guest Speedfit.
Grip-and-seal collet design for reliable connections
Dual Connection
One side inserts into quick connect fittings, the other side provides NPT threaded connection for taps, toilets, and appliances.
Push-to-Connect
Simply push the fitting fully onto the pipe and turn onto the thread. No tools required for installation.
Quick Release
To demount, unlock the nut, push the collet towards the body, and pull the pipe to release. Designed for repeated connection cycles.
UK Engineering
Designed, manufactured and assembled in the United Kingdom by John Guest Speedfit using high-grade polypropylene materials.
Understanding National Pipe Thread measurements
NPT sizing does not match ruler measurements. A 1/4" NPT thread measures approximately 0.540 inches in actual diameter, not 0.25 inches. This is critical for proper fitment. Reference: 1/8" NPT = 0.405" actual diameter, 1/4" NPT = 0.540", 3/8" NPT = 0.675", 1/2" NPT = 0.840". Always verify thread size before ordering.
Works with John Guest quick-connect systems
Compatible with John Guest Speedfit quick-connect fittings and tubing systems. Ideal for connecting reverse osmosis systems, water filtration equipment, ice makers, refrigerators, and appliances requiring NPT threaded connections. Female coupler design allows connection to taps, toilets, and other fixtures with male NPT threads.
No Tools Required
Hand-tighten installation with push-to-connect convenience
Reusable Design
Quick-release collet allows repeated connection and disconnection
Grip-and-Seal
John Guest collet arrangement ensures secure, leak-free connections
UK Quality
Manufactured to John Guest Speedfit standards in the United Kingdom
