Lakeside,
I am not an expert by any means, but I would not be willing to accept 14ppm as a result?
My home H2O is about 190, my result has been Zero since I got the RO/DI. I have 3 replacement columns which I recently ordered but am waiting to install if the TDS reads anything greater than zero.
Somehwere in the back of my head I remember a threat which mentioned that anything up to 4 is acceptable.