I've had an APEC R. O system for ever, I'm also a contractor and have recommended them and installed them for many of my customers throughout the years .
I replaced my aging system with this new identical system. ( probably didn't need to but
I think it was more cost effective than replacing parts in the future)
I was disappointed with the assembly of the new system , push to connect fittings vs the older compression ones that I have had zero problems with . Several fittings leaked after I turned it on after install, loose fittings or not enough tape on them to make them water tight. So pretty much had to go through the whole thing and re install afterwards . That's the second time now , I had leaking fitting issues with a system I installed for one of my customers end of last year also . Definitely not what I'm used to from this company .