Originally Posted by
rkpetersen
Couple of thoughts. First, make sure that the hard plastic tube that goes down into the DDR container isn't broken or cracked at all. Second, make sure that the flexible tubing you insert into the fitting is cut perfectly square, inserted firmly all the way, and then pull the little collar up a bit and push the tubing in again. Check whether this is now secure by running the DOS and seeing if the fluid level climbs up and across the fitting. If so then flush the system to expel all bubbles. Something that I also do, although this is definitely not 'by the book', is to put a line of silicone caulk all around the connection between the fitting and the tubing to ensure an airtight seal.
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