In-Ground 5-Inch Pop-Up Adjustable Sprinkler With Quick Hose Connector, QSK-741

Q: What do you do with these in the winter? Should we pull them up?

There's no need to pull them up, leave them in the ground even in the coldest climates. It's imperative that you winterize the units before the first freeze, you do this by emptying the water from the unit. Use a Quick-Snap Air Purge (Search on Amazon ASIN: "B002ECEG9I" combined with an ordinary bicycle pump to blast out the water.