PEX fittings and Valve for water tankless heater: influence of design features on National Reliability of connection (eg, DIN 16963) and international (EN 1555, EN 12201, EN 13244) standards for the technical and geometric parameters of the PEX fittings with mortgages electric heater only very general requirements. Subject to correct installation of PEX fittings must, of course, satisfy the requirements of the pipeline.
Obviously, when laboratory tests are not always able to reproduce the conditions that comply fully with the practice. In this case, the manufacturer is responsible for ensuring that the system proposed by the client, was a reliable and practical. This requires some experience and know-how in areas like manufacturing of PEX products, and installing them on site.
Despite the dominant role of the factor of reliability of the pipeline, which can be expected lifespan of 100 years, this aspect sometimes gets low priority because of the short-term benefits associated with the use of certain products, if the document confirming the permissibility of their use.
Mounting PEX fitting should occur, in general, in accordance with applicable directives and instructions for installation of the manufacturer.
The most important developer of products has been and remains the consumer. Only through his signals on the shortcomings of the product may solve problems that arise in practice, and its further improvement.
Basic
In developing the PEX fittings with mortgages electric heater crucial given the following parameters (note the manufacturer’s data!):
weldability of different materials pipes (PE 80, PE 100 and PE-Xa);
temperature range from 15 to +50 ° C;
wall thickness of SDR 17,6 (17,0), SDR 11, SDR 7,4 (standard sizes in Germany), irregular sizes SDR 41, SDR 21 and SDR 6 apply to the use of relevant parameters;
weldability sedelok, including cutting holes in the main pipe, for all standard sizes of pipes without pressure and, depending on the design, the maximum allowable working pressure.