From the manual, it looks like the filter comes with unions for connecting the piping which should make the installation straightforward. There are a couple options for the piping connections, 1.5", 2" threaded 1.5"/2" slip. Figure out what you have so you can order the right adapter. Teflon tape is your friend. If existing connections are too tight, a strap wrench can help alot but use caution if using it to tighten as hand tight is plus a little is enough, plastic fittings can break if overtightened.