While not essential for the operation of a pressure washer, quick connectors make life a lot easier when setting up or packing up after a hard days work! There are a variety of quick connectors available for the pressure washer. Also known as quick couplers or quick disconnect.
GARDEN HOSE CONNECTORS
For the homeowner a cheap plastic style, available from most hardware or plumbing stores will do the job.
For the commercial operator a more robust, and expensive, brass connector is preferred.
A FGHT X FGHT QC can sometimes be difficult to find.
HIGH PRESSURE HOSE CONNECTORS
The most common North American style is the 2 piece socket and
EZGrip Female Socket EZGrip Male Socket
An o-ring fits inside the Socket to make the seal
The other style of QC is the Screw Type (most commonly referred to as M22 because the screw threads are metric 22 millimeter) Mostly a European thing these connectors are quite prevalent in North America. While not as easy to use they are very secure. They work by screwing the socket and plug sides together with about 4 turns. The socket side has a large plastic cover which allows it to be turned easily by hand. If you drop the socket on concrete this plastic cover will break, making the fitting pretty much useless as a quick connector. This style comes in both male and female NPT threads to fit wands and hoses. The socket side has an o-ring to make a positive seal. Here are some photos of typical M22 fittings:
M22 Socket Male M22 Socket
X Female M22 Socket Connector
NOTE ADDED 01/22/2017: There are two different
internal diameter sizes available on M22 fittings. Some are 15mm, while
others are 14mm. This can cause problems when replacing hoses and guns
on small "hobby" electric pressure washers. There are
adapters available for 15mm to 14mm and 14mm to 15mm. See:
Regardless of what QC you use make sure you keep them clean. Dragging your hoses around a dirty or muddy site is a sure fire way to fill the connectors with debris. Connecting dirty connectors will contaminate your system, plugging nozzles, breaking valves, and scoring pistons.
Another thing to be aware of is using QC style fitting when working over the side of a building. This fitting can be pulled apart when pulled over an edge, allowing hoses to fall. M22 screw types will not come apart when pulled.