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"If there be any among us who [disagree], let them stand undisturbed as monuments of the safety with which error of opinion may be tolerated, where reason is left free to combat it." Thomas Jefferson, March 4, 1801
Metric adapters: There are two metric pipe standards: JIS and DIN. The very first thing you need to do is determine which standard you have. Use the chart below to determine which you have by measuring the ID and oD of your pipe and comparing it with the numbers in the chart below. It helps if you have a digital caliper set to read in mm. Look carefully at the parts below. Some are identified by JIS and others DIN. You have to be precise. If you need help call or email us. We have the actual measurements of each part in the description of the part. So read carefully to find the right part. NOTE: The unions below show the actual metric opening NOT the nominal size. Just read the description and view the picture if you have any doubts! Call or email us if you still have any doubts! :-)
Here is a chart that might help you identify which metric pipe you have: