I'm a 1st time user of pex tubing for heating and got some inserts from 2 different suppliers (oooh don't ask why). They sent these.
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Is there a reason for the O rings on one - or are they just better quality?PEX not all inserts are created equal it seems
Oct 20, 2014
4 Replies
The right one looks like genuine JG Speedfit. Potentially offers a second line of defence over the one O ring in the fitting so I guess it is "better" but not essential as a copper pipe into the same fitting will only reply on a single O-Ring.
Second line of defence and the one without the O rings should be the one used with compression fittings.
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--28mm-SIZE-PIPE---ACCESSORIES/Inserts.aspx
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That figures - thinking back it is basically the same part as the MDPE insert I used making an MDPE to copper compression joint.
Purely for a push-fit design from the same maker, IWT. O-rings would be a liability on a compression fitting.
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