Set of 12 Replacement Gauge Glass for Residential Low-Pressure Steam Boilers, 5/8 Inch Outer Diameter by 12 Inch Length, 58GG12 Compatible with Crown, Does Not Include Gaskets or Friction Rings, Supports Up To 205 PSI at 150F and 100 PSI at 425F

12-Pack Replacement Gauge Glass for Residential Boilers
✔️ 12-pack gauge glass, 5/8 in dia x 12 in long (15.9x304.8 mm) Crown 58GG12 fit

Gauge glass replacements are designed for residential low-pressure steam boilers, providing a clear view of boiler water level and pressure indicators. They’re sized to fit Crown 58GG12 assemblies and are sold as a 12-pack; gaskets and friction rings are not included. This handy set is ideal for home heating systems in basements or utility rooms.

✅ 5/8 in diameter (15.9 mm) × 12 in length (304.8 mm) gauge glass
✅ 12-pack replacement set for easy stock and quick swaps
✅ Max working pressure 205 PSI at 150°F; 100 PSI at 425°F
✅ Fits Crown 58GG12 assemblies
✅ Does not include gaskets or friction rings

💡 What is gauge glass used for in residential boiler systems?

Gauge glass lets you safely read water level and monitor steam boiler operation.

- Handy for homeowners to track water levels in the boiler - Helps ensure proper pressure and prevent boiler dry-out - Fits Crown 58GG12 compatible assemblies - Keep as a spare part for quick maintenance