I got on the appion wagon too after reading all the good reviews. I have the same problem with my Appion CRT's, they will not pull a core. I also bought the 1/2" hoses w/ 3/8" x 1/4" fittings and the brass crimp was jacked up on both hoses. They should've noticed the bad crimp when they were in QC. I traded the hoses in for YJ 1/2" x 6'. I've tested my C&D CRT with 500# of pressure under water w/ no leaks.