I have a 3170, which is the Sunseeker line. The 3171 Forester is similar to 3170 Sunseeker. You have to look underneath the back part of the RV, there will be a bunch of tubes with screw caps on them. Those are the low point drains. Oh yeah. You need to have the water pump (red switch) turned on, but don't run the water pump (don't turn on the faucet.). I found that if the red switch was "off," nothing came out of the drains.
JJ only, my cat went to Rainbow Bridge July 2015
I love my Sunseeker, when I'm on a trip I don't wanna go home!!!"
Total days camping each year: AS MUCH AS POSSIBLE!