Hex Couplers

A hex coupler joins two pipes or fittings of the same size with a female thread on each end. The six-sided body gives your wrench a firm grip, so you get a tight, leak-free connection.

How to Choose

Match the thread size to the parts you are joining, then choose the material. Brass suits standard water lines, stainless steel handles chemicals and salt air, and plated steel carries higher pressure. Pick a coupler rated at or above your machine's maximum PSI.

Common Applications

• Joining two male-threaded nipples or fittings
• Extending pump and manifold plumbing
• Repairing and rebuilding hose plumbing
• Connecting valves, filters, and accessories

Frequently Asked Questions

What does a hex coupler do?
It connects two parts that both have male threads. Each end of the coupler is female, so the two parts thread into it from opposite sides.

How is it different from a hex nipple?
A coupler is female on both ends and joins two male parts. A nipple is male on both ends and joins two female parts. Pick the one that matches your threads.

Do you carry reducing hex couplers?
Yes, we stock both same-size and reducing versions. Call us with both sizes and we will help.

Why Buy from Sun Brite Supply

For more than 30 years, Sun Brite Supply has served Maryland's pressure washing trade from Gaithersburg, MD. Call (301) 519-9274 and we will get you the right hex coupler.