Reducer Coupling

Prepare installation tools and materials:

Before installation, prepare the following tools and materials:
tool
Wrench (pipe wrench/adjustable wrench): used to tighten brass joints.
Pipe cutter/saw: used for cutting pipes (if needed).
File: Used to remove burrs after cutting pipes.
material
Reducing Coupling
Pipes (copper pipes, iron pipes, PEX, PVC, etc.)
Sealing material (raw tape/Teflon Tape or pipe sealant/Pipe Sealant)

Ensure that the pipeline is cut flat (applicable to the pipeline that needs to be cut):

If the pipeline has already been trimmed, please skip this step.
Use a pipe cutter or saw to cut the pipeline to meet installation requirements.
Use a file or sandpaper to remove burrs from the pipe mouth, ensuring that the connecting end is smooth and free of impurities to avoid affecting the sealing effect.
Manage the inside and outside of the pipeline, remove oil stains, rust, scale or impurities to improve the sealing of the connection.

Wrap sealing material (suitable for threaded connections):

If it is a threaded connection (NPT, BSP, G thread), sealing materials need to be used to prevent leakage.
(1) Using Teflon Tape
Take an appropriate amount of raw material tape and wrap it clockwise 4-6 times from the root of the thread.
Ensure that the raw tape covers the entire thread, but do not wrap it too thick to avoid difficulty in screwing in.
(2). Use Pipe Sealant (optional)
Apply a thin layer of pipe sealant on the threads to improve the sealing effect.
Wait for 10-15 minutes for the sealant to solidify slightly.
Note: If using compression, welding, or quick insert fittings, there is no need to use tape or sealant.

Connecting pipes and reducing coupling:

Choose the appropriate connection method based on the type of pipeline:
✔ Threaded connection (NPT/BSP/G)
Screw in the threaded interface by hand, ensuring the correct direction and avoiding crossing threads.
Use a wrench to tighten, but do not apply too much force to avoid damaging the threads.
✔ Welding connection (copper pipe)
Use a welding gun to heat the connection point, apply an appropriate amount of solder to make it flow evenly and form a sealing layer.
Check if the connection is secure after cooling.
✔ Clamp connection (PEX, stainless steel pipe, etc.)
Insert the pipeline into the compression joint, ensuring it is inserted to the bottom.
Use a crimping tool for crimping and check if it is securely fixed.
✔ Quick plug connection (some PEX or PE pipes)
Insert the quick plug brass connector directly and hear a "click" to indicate that the connection is complete.
Pull the pipeline to test for firmness.

Check if the installation is secure:

After the connection is completed, be sure to check the installation status:
Apply slight force with a wrench to ensure that all threaded joints are secure but not too tight.
Check if the sealing material is complete and there is no exposed or loose raw material tape.
For welding, crimping, or quick insert connections, check for gaps and ensure that the pipeline is inserted to the bottom.

Test the system to ensure no leaks:

After installation, conduct a sealing test to ensure there is no water or air leakage.
Open the pipeline system and gradually increase the pressure (such as opening the water valve in the water supply pipeline and filling the gas pipeline with a small amount of gas).
Check for leaks at the connection:
Water pipe test: Wipe the interface with a dry cloth and observe if there is any water seepage.
Gas testing (gas/air pipeline): Apply soapy water to the interface and observe for the formation of bubbles.
If leakage is found, tighten or reseal it in a timely manner.
After confirming that the sealing is good, the system will resume normal operation.

Maintenance and Precautions:

Regularly check for leaks or looseness at connections, especially in high-pressure or frequently used piping systems.
Avoid overloading and tightening threads to prevent cracking or damage to brass fittings.
For pipeline systems that have been in use for a long time, it is recommended to regularly replace sealing materials such as raw tape or pipeline sealants to ensure long-term sealing effectiveness.