Most wire strippers have a small screw-cutting hole built into the jaws — it shears a screw cleanly to length instead of mashing the threads the way pliers or a diagonal cutter would.
When a hole lands between studs, repair clips slide over the cut edges of the existing drywall and give the patch something solid to screw into — no fishing backing boards through the hole.
On the common tower-style fill valve, a locking ring lets the whole upper assembly twist out while the base stays sealed — swap in a new top without draining a drop. And before replacing anything, check the little inlet filter; a clogged screen causes most slow fills.