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Push-to-pull compression fittings
Push-to-pull, push-to-connect, push-in, push-fit, or instant fittings are a type of easily removed compression fitting or quick connect fitting that allows an air (or water) line to be attached, nominally without the use of tools (a tool is still usually required for cutting tubing to length and removal). These fittings act similar to the way regular compression fittings work, but use a resilient O-ring (normally EPDM) for sealing, and a grip ring (normally stainless steel) to hold the tube in place.
The main advantages of this technology over traditional soldered copper or glued plastic are that fittings can easily be unmounted and re-used, speed of assembly, assembly is possible when wet, and that the joints can still be rotated after connection.
These fittings can be used on all sorts of pipe of many sizes for many purposes.
British manufacturer Hepworth Building Products (founded 1936 in Doncaster) introduced these fittings under the brand Hep2O in 1980. It was a grey plastic material for the first couple of decades. There was a reusable fitting that could be unscrewed and a slimmer single-use fitting which could not. A new grab washer was required each time if a joint was reused. The fittings were designed for use with polybutylene pipe, while stainless steel pipe inserts were used for internal support.
Hepworth was acquired by Wavin in 2005. Hep2O changed material and design in the 2000s to a smooth white plastic and a push-to-demount design. This resulted in a physically smaller fitting that is easier to release, especially in a confined space.
John Guest (Established in 1961, West Drayton, UK) developed the Speedfit push-fit connector for compressed air use in 1974, and introduced plumbing fittings in 1987. These fittings are white plastic, and are unscrewable to replace components, like Hep2O, but also have a push-release mechanism. Speedfit uses plastic pipe support inserts.
Brass demountable push-fit fittings are manufactured by Pegler under the brand Tectite. In the US, several different brands are available: Sharkbite, PlumBite, Nibco Push, which are all brass, demountable, similar to the Pegler Tectite design.
Some fittings are only designed for plastic (PEX and PERT) pipe and are non-removable. In the US, Legend Valve make a single-use push-fit system, and Sharkbite have one called EvoPex.
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Push-to-pull compression fittings
Push-to-pull, push-to-connect, push-in, push-fit, or instant fittings are a type of easily removed compression fitting or quick connect fitting that allows an air (or water) line to be attached, nominally without the use of tools (a tool is still usually required for cutting tubing to length and removal). These fittings act similar to the way regular compression fittings work, but use a resilient O-ring (normally EPDM) for sealing, and a grip ring (normally stainless steel) to hold the tube in place.
The main advantages of this technology over traditional soldered copper or glued plastic are that fittings can easily be unmounted and re-used, speed of assembly, assembly is possible when wet, and that the joints can still be rotated after connection.
These fittings can be used on all sorts of pipe of many sizes for many purposes.
British manufacturer Hepworth Building Products (founded 1936 in Doncaster) introduced these fittings under the brand Hep2O in 1980. It was a grey plastic material for the first couple of decades. There was a reusable fitting that could be unscrewed and a slimmer single-use fitting which could not. A new grab washer was required each time if a joint was reused. The fittings were designed for use with polybutylene pipe, while stainless steel pipe inserts were used for internal support.
Hepworth was acquired by Wavin in 2005. Hep2O changed material and design in the 2000s to a smooth white plastic and a push-to-demount design. This resulted in a physically smaller fitting that is easier to release, especially in a confined space.
John Guest (Established in 1961, West Drayton, UK) developed the Speedfit push-fit connector for compressed air use in 1974, and introduced plumbing fittings in 1987. These fittings are white plastic, and are unscrewable to replace components, like Hep2O, but also have a push-release mechanism. Speedfit uses plastic pipe support inserts.
Brass demountable push-fit fittings are manufactured by Pegler under the brand Tectite. In the US, several different brands are available: Sharkbite, PlumBite, Nibco Push, which are all brass, demountable, similar to the Pegler Tectite design.
Some fittings are only designed for plastic (PEX and PERT) pipe and are non-removable. In the US, Legend Valve make a single-use push-fit system, and Sharkbite have one called EvoPex.