Oh...YOU did the work yourself.
Tell us more.
How did you vent it?
And how did you vent your floor drain?
Your floor drain will almost never see any water (probably NEVER in
fact) what are you using the prime your trap? If you havent' installed
it yet, you might want to install an automatic trap primer so you
don't have to fuck with it at all. Either that or you can do that
trick where you deliberately backgrade a section of drain pipe in
order to auto-prime your trap by stealing some of the water from your
washing machine loads. Not to code in most areas though.
And no, you don't need a liner. However, I love those liners. When we
remodeled the house, we used that stuff everywhere. I have all tile
everywhere in the house now. Spring cleaning around here is a breeze.
I simply move the furniture and use the pressure washer to clean the
interior. If you like clean, this is the only way to go.
I agree that turning the water off entirely isn't a bad idea. However,
I personally use DW hoses that are metal-braided for an added level of
protection. I do think a VERY accessible whole house shutoff makes a
lot of sense. Instead of turning off ONE fixture, why not turn the
whole house off before you leave for work?