Don’t skimp on plumber’s putty. It’s just not worth it. Sure, as you tighten things down, a bunch will squeeze out that you’ll have to clean up. But that’s 10 seconds of work. Reinstalling everything 4 months after you originally installed it is much more irritating.
Ditto for primer and PVC glue in sprinkling systems. Especially, especially when the sprinkler lines run under the driveway…
Yowzers!