Allen Head Plugs

An allen head plug seals an unused port in pressure washer plumbing. The recessed hex drive sits flush, so the plug stays low profile and out of the way while it holds back full pressure.

How to Choose

Match the thread size and type to the open port you need to seal. Choose brass for standard water plumbing, stainless steel for chemicals and salt, and plated steel for high pressure. The plug should be rated at or above your machine's maximum PSI.

Common Applications

• Sealing unused ports on manifolds and tees
• Capping off pump and unloader openings
• Blanking ports during testing or service
• Closing spare gauge and accessory ports

Frequently Asked Questions

Why use an allen head plug instead of a square head plug?
The recessed hex drive sits flush with the fitting, so nothing sticks out to catch a hose or your hand. It is the cleaner choice in tight plumbing.

What size allen key do I need?
It depends on the plug size. The plug is installed and removed with a standard hex key that matches its recess.

Will it hold full pressure?
Yes, when sized and threaded correctly with thread sealant. Pick a plug rated for your machine's PSI.

Why Buy from Sun Brite Supply

For over 30 years, Sun Brite Supply has supplied Maryland's pressure washing pros from our Gaithersburg, MD store. Call (301) 519-9274 and we will match the right allen head plug.