The body has an internal geometry to precisely house the collet, O-ring and tubing when assembled.s from 1/4- to 1/2-in. Similarly, with barbed fittings, the barbed inserts are forcefully pushed into the tube I. The rapid acceptance of push in fitting during the 1990s has established them as the connection technology standard for today&39;s water industry. Care should be taken to ensure that application operating parameters are within the fittings manufacturer&39;s guidelines. per sq. 

The fitting body can be made from metal (brass, stainless steel) or plastic (acetal, polypropylene). A few are capable of handling both plastic and copper without any change to the fitting. This ensures the tube is fully inserted and properly seated. Components and Accessories Many push in fitting manufacturers offer component part sets that allow push-in technology to be incorporated into product housings. In addition, the manufacturer should have a strong distribution network and trained sales personnel, as well as provide marketing and promotional support.D.S.) must be assembled as part of the connection procedure.D. Tubing should be of sound quality. 

With the collet held in this position, tubing is pulled straight out. water market since the early 1990s. Conclusion The growth in the use of push in fitting has been fueled by the needs of dealers and installers to enhance productivity, increase reliability, and reduce overall costs. Again, check the manufacturer&39;s specifications to ensure correct mating of threads.004 in. Tube O.001/-. to ensure proper sealing on the O-ring. In addition, because they are plastic, push in fitting lend themselves better to applications where lead exposure from brass is a concern. Technical Specifications In the water industry, virtually all push in fitting are made from plastic-commonly acetal or polypropylene. Push in fitting can also be found in installations of water fountains, water coolers, ice machines, juice and beverage dispensers and coffee brewers. water markets in the mid-1980s, push in fitting had to overcome many obstacles of misperception. This allows for an integral push-in connection to valves, filters, pumps, etc.D. 

Check the manufacturer&39;s catalog for technical specifications. In applications where harsh chemicals are present, the manufacturer&39;s chemical compatibility chart should be referred to. The tube should be pushed in as far as it can go. Such component part sets are employed at the OEM level, making the OEM&39;s products more user-friendly and thus more marketable. and then secured by tightening a tiny clamp over the connection. tolerances should be +. Many push in fitting allow transition from threads to push-in connection. These include locking clips, collet covers and threaded stem adapters to make swivel combinations. Installation As with any product, proper installation is critical to accurate performance and reliability. Always check with the manufacturer to ensure tubing compatibility. Also, most plastic threaded push in fitting need only be hand-tightened.D. Some push in fitting are limited for use with either plastic or copper tubing. in. General practices. The part sets typically include a metal or plastic "cartridge" insert that presses into a pre-determined port in the housing. Over-tightening may cause stress fractures and result in leaks. Old Snowmobile rubber track Factory methods of connecting tubing (compression and barbed fittings) were difficult to let go for fear of trying something new and innovative. Threads. However, one must remember that any product is still only as good as the company that makes it. Since then, push in fitting have been-by many accounts-the fastest-growing technology change in the water industry. Trying to find a dropped nut or ferrule while working beneath a sink is not a very productive use of time. There are various types of threads used such as NPT, NPTF, flare, compression, BSP and BSPT-in straight, tapered, male and female configurations. Generally, plastic push in fitting are suitable for pressures from vacuum to 150 lbs. This can be especially important for system cleaning and sanitizing procedures. However, as leading edge technologies were changing the water market, more and more installers and OEMs started enjoying the labor-saving and reliability benefits of push in fitting.) of the tube. Their most common use is for general tubing connections in RO and water filtration systems. Operating parameters of pressure and temperature may vary from one installation to another. When making a connection with a push-in fitting, it is essential the tube is cut square and is free of score marks, burrs and sharp edges. Applications push in fitting have found their place in the water industry. Ensure that tube dimensions, tolerances, roundness and surface finish are consistent with the manufacturer&39;s recommendations. The collet teeth provide a firm grip on plastic or copper tube. Your manufacturer&39;s catalog should give tightening torque value guidelines. The components of push in fitting are self-contained, insertion is simple and quick, and thread tightening can be done by hand. It is seated inside the fitting body and forms a seal on the outside diameter (O. The flexibility of the collet legs allows for easy insertion and release of the tubing. The O-ring is usually made of a food-grade rubber compound (nitrile, EPDM). With compression fittings (metal or plastic) the various bit parts (nuts, ferrules, etc. The tube can be removed by simply pushing the collet in squarely against the fitting. However, push in fitting are also used on water valves, tanks, pumps and faucets to ease installation and increase system reliability. Their light weight and small size also make them easy to ship and receive and carry around. Fitting Construction While push in fitting require complex engineering design and precise, high-quality manufacturing to produce, they are quite simple to understand and utilize. Benefits When compared with the older methods of connection, the benefits of push in fitting begin to stack up quickly. Areas such as customer service, technical support and training should always be considered when selecting a push-in fitting brand. One of the benefits of push in fitting is that installations can be quickly disconnected for service. The collet snaps into the cartridge after the O-ring is pushed down into its seat. Push in fitting are made up of three basic components-the fitting body, a flexible "collet" and an O-ring. A quality guillotine-style tube cutter should be used for plastic tubing, while a plumber&39;s pipe cutter should be used for copper tubing. Dealers and installers couldn&39;t believe something so simple could work reliably. Fitting bodies come in many configurations such as tees, elbows, unions and threaded connectors. Generally, both fitting and tubing can be re-used. The tube is inserted through the collet, then past the O-ring, all the way to the tube stop. (psi) of pressure, temperatures from 33° to 150° F, and tube O.D. push in fitting eliminate the difficulties associated with these older methods. There are certain key points to remember, specific to push in fitting, to ensure a quality installation: Tubing.S. Also, in tightening the compression nut, the question of "how tight is tight enough?" usually comes up. Tees, elbows and other multi-connection fittings become quite a chore to assemble. Care should be taken with any type of fitting to ensure generally accepted, good installation practices are employed. With their initial entrance into the U.The concept of push in fitting has been around for decades, yet it has only seen significant growth in the U.. It is a good practice to pull on the tube to verify it is secure, and then test the installation prior to use. Various accessories enhance the use of push in fitting. The collet holds the tube in place, while the O-ring seals on the tube O. The collet is typically made from plastic with stainless steel gripping teeth molded into its flexible legs. No pipe dope, sealants or special tools are needed.

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