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What is the difference between a male and a female quick fitting?
The only thing that separates a male fitting from a female fitting is where the fitting thread is located. On a male fitting, the thread is located on the outside, while it is located on the inside for a female fitting, .

The water treatment industry uses several other terms to describe fittings, like connectors and adapters. The terms connector and adapter really mean the same thing. If you want to be specific though, an adapter is typically a fitting that changes venue. On one end, there is a thread connection, and on the other, there is a stem adapter. However, they both are still connectors. The threaded side connects to other threads, and the stem side connects to tubing.

What makes a quick fitting watertight?
As long as your quick fitting are not subject to environments with excessive vibration or movement, they should always stay in place. The O-ring inside of a quick fitting usually remains in good condition for a long time, however, the O-ring could dry out and cause a slow-drip leak after many years of service. If the fitting is manufactured correctly and without defects, this should never happen.

If our fittings operate in an application like a motor home or a boat or equipment with a pump, the motor vibration could cause the tubing to gradually slip out of place. To prevent this from happening, you can equip the fitting with a locking clip. The locking clip holds the collet up so that the teeth remain pressed into the tubing at all times, allowing the tubing no room to slip out.

What makes a quick-connect fitting leak?
The most common reason for leaking is that the tubing did not get pushed in all the way, and the O-ring is not sealing properly. One trick is to measure 3/4 an inch and draw a line on the tubing going into the fitting. That line should disappear into the fitting.

Another reason that you may be experiencing a leak is that the tubing was not cut properly. If the tubing is cut in a diagonal shape rather than a square cut, the O-ring may not have been able to seal all the way around the circumference of the tubing.

Another potential issue is a lacerated O-ring. If the tubing doesn’t get cut properly, and it has a sharp point, the sharp point could damage the O-ring, making it impossible to seal.

Too much side torque, or side load, could also result in a leaking fitting. If you try to bend the tubing to make a connection to your water treatment system, the tubing itself could elongate the O-ring into an oval shape that will create a lapse in the seal and cause the fitting to leak.

Frequently taking the tubing apart and putting it can cause gradual damage to your tubing. The metal teeth on the inside of the locking collet bite hard into your tubing. Every time that you remove the tubing from the fitting, you could be scraping away small bits of the tubing. Over time, this frequent removal could cause your tubing to be scratched so deeply that it bypasses the O-ring, allowing water to pass. If you are in need of a fitting that you can connect and disconnect over and over again, you might want to consider using a quick-release fitting.

What temperatures and pressures can a quick fitting withstand?
The quick fitting are rated to withstand pressure based on temperature and the fitting size. The warmer the water, the lower pressure the fitting will withstand. This has to do with the expansion and contraction of the plastics. The larger the tubing and more rigid the tubing, the more pressure the fitting can withstand. Pressure and temperature have to be looked at together to determine the pressure limit.

Can you use quick-connect fittings with gas and air?
Most quick-connect fittings are rated to handle liquid compressed air, and gas. Some manufacturers are specific about how they rate their fittings. If they are made to handle the transport of water, they will only provide specs and ratings for that kind of application.

Quick-connects are rated for their chemical compatibility. It's very important for you to check what material fitting you use if you're running fluids with certain chemicals through them. If you run a fluid with chlorine in it through your system, you want to make sure that the plastic fitting you're using can withstand that chemical compound.