Pegler Yorkshire

Tue, 21 Jul 2015

Like Two Peas in a Pod

Much has been written about the merits of metal push and press fit jointing systems, and there’s been a notable rise in the number of solutions being installed that now benefit from a combined approach. Bearing this in mind, we thought it might be helpful to find out a bit more about the reasons the combined approach is gaining favour, so we asked Janette Henwood, our market manager for push-fit systems for her take on the situation.

We know there are many reasons influencing installers’ decisions to use a particular jointing system, from education and training through to time and cost savings and no heat requirements. But quality and the reduced risk of system failures are still the top priorities.

Press Technology

Press-fit has a reputation for being a high performing solution. Since its inception in the late 1950s its popularity has been paramount to the success of many projects.  Because there is no need to use heat and solder it is a very clean and fast jointing method. It doesn’t leave carbon deposits or flux so there is less risk of corrosion and time required to flush the system.

Push Technology

On the other hand push-fit is relatively new in comparison – introduced back in the 1980s it was originally classified as a light domestic solution used in conjunction with plastic piping. But today’s metal fittings have advanced that much, push-fit is now being used on a full range of projects from small domestic to large scale commercial, including The Shard. The technological improvements of quality push-fit fittings means they are now compatible with a variety of pipe materials and their range can easily dovetail with everything from plastic to flexible metal, copper and even carbon steel. 


Why Metal Push or Press Fit?

No Hot Permit Required

Compared to traditional methods the flameless installation offered by metal push or press fittings eradicates fire risk during the jointing process. It negates the requirement for a hot work permit and eradicates localised annealing from high temperatures. 

Cleaner System

As well as potential fire hazards, traditional methods use flux and solder which can run inside the fitting. A metal push or press fit system does away with the need for additional substances to create the seal eliminating any flux deposits which can cause a corrosive build up and shorten the lifespan of a system. Plus, with no solder on the internal walls of the pipe and fitting, the system operates with a full bore and less time is required to rigorously flush the system on completion. 

Confined Spaces

It can be difficult to ensure a joint is made correctly, when using traditional techniques, if access to it is restricted. If the blowtorch for example, cannot be passed around the fitting completely there is a risk that jointing is incomplete and a corresponding risk of leakage. 

Identifying Quality

So how do installers identify a system that will provide a reliable connection? The basic concept of a metal push-fit fitting for example comprises a metallic body, a plastic cartridge, a seal and a grab ring. This metallic body provides a range of features; it ensures the joint remains stiff, offers strength and reliability, as well as providing electrical continuity in some cases.

Highly engineered quality modern systems now incorporate easily identifiable fail safe features such as Pegler Yorkshire’s XPress unique Leak Before Press design which allows installers to instantly identify unpressed joints, and Tectite’s patented TectSEAL, directional seals pre-lubricated for reduced insertion force and the provision of a reliable seal.

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