Pressure Washer Adapter Hotsy Style with 3/8" Female Pipe (NPT) Thread

Hotsy Style Adapter for 3/8" NPT Pressure Washer Fittings, 4000 psi

Product Overview

A Hotsy style hose end will not seal against a standard pipe fitting, so crews running pressure washers with Hotsy style fittings and generic 3/8" NPT hoses cannot connect the two. The Greenline PW-HMPF-06 pressure washer adapter fixes that. One end is a 1/2-14 male Hotsy style thread with a 7/16" tube, the other a 3/8" female NPT port, rated 4000 psi.

Key Features and Benefits

• Converts a 1/2-14 Hotsy style connection to 3/8" female NPT in one piece, so standard pressure washer fittings thread on without hose re-ending.
• The Hotsy style end seals on an O-ring housed in the male tube, with a nose protruding from the female counterpart's thread. The O-ring makes the seal, not the threads.
• The 3/8" NPT end accepts any 3/8" male pipe thread, including 3/8" brass quick connect nipples when you want a pressure washer quick connect setup downstream.
• Zinc-plated carbon steel body rated to 4000 psi working pressure, the same rating as the Blue Storm and Black Storm 4000 psi hose assemblies.
• Straight shape and 0.14 lb weight keep it compact as a pressure washer hose connector.
• Seals only when threaded into its corresponding Hotsy style female counterpart, per Green Line's safety note.

Specifications

Which Pressure Washer Fittings Do You Have?

Look at the hose or gun end before you buy a pressure washer adapter. A Hotsy style end has a 1/2-14 thread with a 7/16" tube and a visible O-ring. An M22 end is a 22 mm metric thread, the Karcher style thread. A plain NPT end is a tapered pipe thread with no O-ring.

This Hotsy style adapter covers the first case. For M22 ends, use the Male Metric to Female NPT pressure washer adapter instead.

Applications

• Fleet and municipal wash bays running pressure washers with Hotsy style fittings alongside generic 3/8" NPT pressure washer fittings.
• Contractors who swap a worn Hotsy style hose for one with a 3/8" NPT pressure washer fitting and need a pressure washer hose adapter at the gun.
• Rental shops converting a Hotsy style outlet to pressure washer quick connect by threading a 3/8" MPT nipple into the Hotsy style adapter's NPT end.
• Connecting a Hotsy-style gun to Grey Storm 3/8" male NPT hose assemblies, with this pressure washer hose adapter at the gun inlet.
• Maintenance trucks carrying a spare pressure washer hose connector to fix a thread mismatch on site.

Installation and Use Notes

The 3/8" NPT end is a tapered thread, so wrap it with PTFE tape or pipe sealant before assembly. The Hotsy style end seals on its O-ring, so inspect it for cuts or flattening before each reconnect. Thread the Hotsy style end into its matching counterpart only. An M22 or plain pipe fitting will not seal even if the threads start. Stay within the adapter's 4000 psi working pressure.

Buy Pressure Washer Fittings Online from Cleanflow

Order the Greenline PW-HMPF-06 pressure washer adapter and other pressure washer fittings online from Cleanflow Utility Supply Company, which stocks Green Line hose and fittings. Orders ship from Canada to addresses across Canada and the USA, with free shipping on orders over $199. Return or exchange within 30 days of purchase under the Cleanflow return policy. Email info@cleanflow.ca to confirm the thread you need before ordering.

Frequently Asked Questions

What is a Hotsy style fitting on a pressure washer?

A Hotsy style fitting is a threaded pressure washer fitting with a 1/2-14 thread and a 7/16" tube on the male side. The male tube carries an O-ring, and the female side has a protruding nose, so the pair seals on the O-ring rather than on the threads.

Are pressure washer fittings NPT?

Standard North American hoses, guns, and quick connect nipples use 1/4" or 3/8" NPT tapered pipe threads. Hotsy style and M22 metric ends are not NPT, which is why this pressure washer adapter exists.

What size are pressure washer fittings, 1/4" or 3/8"?

On the Cleanflow pressure washer range, spray nozzles and lances use 1/4" NPT, while hose assemblies use 3/8" NPT. This adapter gives you a 3/8" NPT pressure washer fitting on the pipe side, so match it to 3/8" hoses.

Why is my pressure washer coupler leaking?

Check the counterpart first. Green Line states these adapters only make a positive seal when threaded into the corresponding Hotsy style part, so a Hotsy style end on an M22 or plain NPT fitting will leak. Then check the O-ring for damage and the NPT end for thread sealant.

Hotsy style adapter vs M22 adapter: which one do I need?

Check the hose or gun end. A Hotsy style end is a 1/2-14 thread with a 7/16" tube and an O-ring. An M22 end is a 22 mm metric thread on Karcher-style equipment. Hotsy style ends take this adapter; M22 ends take the Male Metric to Female NPT adapter.