Sink supply lines connect your kitchen or bathroom faucet to the shut-off valve, helping deliver steady hot and cold water without leaks. Explore the range of sink supply lines at Ace Hardware, from Fluidmaster, Plumb Pak and other brands, in the lengths and connection types that fit your setup.
Common Sink Supply Line Connection Types
Connection compatibility usually drives the first decision. The table below compares options often used for kitchen and bathroom sinks.
| Connection Type | Common Use | Typical Material |
|---|
| Compression x FIP | Standard faucet-to-shut-off-valve installs | Braided stainless steel |
| FIP x FIP | Threaded-to-threaded faucet connections | Stainless steel, PVC |
| Push-to-Connect (PTC) | Tool-free retrofit and quick swaps | Polymer, PEX |
| Universal Fit / Click Seal | Multi-fit and one-size installs | Braided stainless steel |
How to Choose the Right Length
Sink supply lines typically range from 9 in. to 72 in., and choosing the correct length can help reduce kinks and strain at the connection. A few quick guidelines:
- Short runs (9–16 in.): Often used for bathroom faucets with shut-off valves close to the basin.
- Mid-range (18–24 in.): A common pick for standard kitchen faucet installs.
- Long runs (30–72 in.): May be needed for deeper cabinets, island sinks, or extended-reach setups. For longer under-sink appliance runs, appliance supply lines are typically a better fit.
Materials and Specialty Features
Material and fitting choice can affect flexibility, corrosion resistance and how the line handles repeated shut-offs. Selections typically include:
- Braided stainless steel: A popular all-purpose option that can support long-term durability and burst resistance.
- PVC and vinyl: Lightweight and budget-friendly, often used for low-pressure or temporary installs.
- Polymer and PEX: Flexible options designed to work with push-to-connect fittings and modern plumbing systems.
Browse the broader supply lines selection if you also need toilet or water heater supply lines.
Pairing Supply Lines with Sink Repairs
Replacing a supply line is often part of a larger faucet or basin repair. Pair new lines with the right sink parts and repair components, including shut-off valves, escutcheons and faucet aerators, to help reduce the risk of leaks after reassembly. For broader project needs, the plumbing department covers fittings, tools and sealants.
How Long Should a Sink Supply Line Be?
Measure from the shut-off valve outlet to the faucet inlet, then add 2–4 inches of slack so the line is not pulled taut. A line that is too short can stress the fittings, while one that is too long may kink or coil awkwardly inside the cabinet.
What Is the Difference Between Compression and FIP Connections?
A compression fitting uses a nut and sleeve to seal on the outside of a pipe, while an FIP (Female Iron Pipe) connection has internal threads that screw onto a male threaded pipe. Matching the connection type to your existing shut-off valve helps support a leak-free install.
Shop Sink Supply Lines Near You
Shop online to compare connection types, lengths and materials side by side before checkout. Visit your local Ace Hardware to talk through the right fit with a store associate and bring the old line in for matching. Shop sink supply lines near you or order online for fast shipping to your door.
