Supply Line Connectors

Supply Line Connectors link fixtures and appliances to your home’s water system, delivering reliable, leak‑free service for faucets, toilets, dishwashers, and washing machines. This category covers braided stainless steel, polymer-reinforced, and solid supply tubes, along with the fittings that make quick work of new installs and replacements.

Choose from compression, push‑to‑connect, and threaded (FIP/MIP/NPT) connectors in common sizes like 1/4 in., 3/8 in., and 1/2 in. for seamless transitions between shut‑off valves and fixture inlets. Braided stainless connectors resist kinks and corrosion, while PEX-compatible ends offer flexibility in tight spaces. Dielectric unions reduce galvanic corrosion where copper meets steel, extending service life.

Look for lead‑free, code‑compliant products rated for potable water, with clear PSI and temperature ratings. Quality O‑rings, EPDM gaskets, and crimp sleeves maintain seal integrity under vibration and thermal cycles. Many options feature integrated ball or angle stops to simplify maintenance and fixture changeouts.

Installation is straightforward: measure twice, pick a length that avoids sharp bends, and match connector type to valve and fixture threads. Use thread sealant or PTFE tape only on tapered metal threads; do not tape compression or push‑to‑connect joints. Tighten to manufacturer specs to prevent overtightening and damaged ferrules. After pressurizing, check for drips at the nut and valve stem and retorque if needed.

For upgrades, consider braided stainless lines with burst‑proof jackets for higher safety margins, or quick‑connect ends to speed service calls. Dishwasher elbows, toilet cone washers, faucet tailpiece adapters, and washing machine hoses with auto‑shutoff add convenience and protection. Stocking a range of lengths and adapter fittings helps accommodate older valves and mixed materials.

Whether you’re a DIYer or a pro, the right supply line connectors reduce callbacks, prevent leaks, and keep water flowing efficiently from valve to fixture. Shop by size, material, certification, and connection type to fit projects and budget.