Install Under-Sink Water Shut-Off Valves
Why It Matters
Old gate valves seize up and fail when you need them most. Quarter-turn valves shut off instantly and reliably in emergencies.
Quick Guide
- 1
Gather your tools and materials
You'll need: Adjustable wrench, Pipe wrench, Plumber's tape. Materials required: Quarter-turn ball valves, Supply lines.
- 2
Perform the install under-sink water shut-off valves
Replace old gate valves with quarter-turn ball valves under sinks for reliable shutoff capability. Safety note: Turn off main water supply before starting.
- 3
Verify and clean up
Check that the work was completed correctly and clean up your workspace. If if pipes are corroded or soldered connections are needed, consider calling a professional.
Tools & Materials
Tools
- Adjustable wrench
- Pipe wrench
- Plumber's tape
Materials
- Quarter-turn ball valves
- Supply lines
Community Tips
Quarter-turn ball valves like Watts Premier ($15-25) should replace older multi-turn gate valves because they require only a 90-degree handle rotation to shut off water completely, making emergency shutoffs faster and more reliable during actual leaks. Gate valves can stick after years of disuse, leaving homeowners helpless when speed matters most.
Do not overtighten compression fittings when installing supply lines—hand-tighten first, then use an adjustable wrench for only 1-2 additional turns, as excessive force strips threads and creates the exact leaks these valves are meant to prevent. Most under-sink failures occur from installation damage, not manufacturing defects.
Sharkbite push-fit valves ($20-35) eliminate the need for solder, flux, and a propane torch, reducing total project material costs by $40-60 and making this task accessible to homeowners without plumbing experience or specialized equipment. The slightly higher per-valve cost pays dividends in accessibility and speed. ---