I disconnected ours this spring. I needed an extra length of pex pipe, just a 6 inch piece or so, and used a couple Sea Tech elbows, that I got at an RV store and it was a simple fix. Hardest part was contorting my body so I could reach the plumbing. The Sea Tech connectors are great because they just squeeze together and can be taken apart in the future if need be. Shark Bite connectors will do the same thing for you. Our trailer was new and I bypassed the filter before we ever used it, given all the nightmare stories that have appeared here. We now use an exterior filter.
2011 GMC Sierra 2500HD
2014 Rockwood 8289WS, Diamond Pkg.