![]() A measuring tape will work but it won’t be as good because we are talking about 1mm differences. ![]() To proper measure the fitting you need will require calipers. Let’s take a deeper look what all the size mean on fittings. Some fittings are 3/8″, some are 22mm, some are 14mm on the inside diameter (some need to be 15mm), sometimes you’ll find fittings going off British pipe thread standards and some are labelled QC F or QC M to confuse. Do you include the thread in that measurement?Įven with digital calipers it can difficult.Is it the inside or outside diameter you measure?.The main confusion when buying fittings is the size you need to get. The quick connect male fits into the female socket and the o-ring is the perfect size to prevent leaks. O-rings are used in the female fittings to prevent leaks. Stainless steel has added chromium to prevent rust. It is an alloy of copper and zinc and with its low melting point is easy to cast and machine. Plastic fittings will only be used for lighter-duty electric pressure washers.īrass is by far the most common fitting material for pressure washers. ![]() Let’s look at the pros and cons of each: Plastic Then stainless steel (very common in professional use due to chemical resistance). Then plastic (there’s lots of residential electric pressure washers out there).
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