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EspañolRestoring an Old Metal Spigot
一、Breakdown & Inspection
Disassemble Completely
Soak in white vinegar bath overnight to loosen mineral deposits.
Tap stuck parts with rawhide mallet (steel hammers dent brass).
Critical Damage Check
Threads: Run fingernail down grooves—catch points mean wear.
Seat surfaces: Shine flashlight into valve chamber—pitting leaks pressure.
Cracks: Dust with baby powder → reveals hairline fractures as dark lines.
二、Rust & Scale Removal
| Method | Best For | Execution |
| Electrolysis Tank | Heavy iron oxide crust | Submerge in baking soda solution + battery charger (sacrificial steel anode) |
| Molasses Bath | Bronze/brass preservation | 1:9 molasses-to-water mix, soak 7 days—gentle derusting |
| Wire Wheel | Surface rust on steel | Brass bristles only (steel wheels scar metal) |
三、Seal Restoration
Resurface Valve Seat
Brass seats: Twist seat grinding tool dipped in valve grinding compound.
Ceramic discs: Replace if chipped—polishing destroys glaze.
Reform Packing Gland
Remove old packing material → wrap graphite-impregnated rope around stem → compress with gland nut.
四、Reassembly Protocol
Lubrication Strategy
Food-safe silicone grease on moving parts (stem threads).
Beeswax coating on exterior—repels water without attracting dirt.
Pressure Testing
Plug outlet → pressurize with bicycle pump → spray soapy water on joints → bubble = leak.
