San Jose's water supply averages 10 grains per gallon hardness, high enough to cause noticeable scale buildup in heat exchangers and tank sediment within 18 months. The calcium carbonate precipitates faster in tankless units because the water passes through narrow channels in the heat exchanger at high velocity. That scale acts as an insulator, forcing the burner to work harder and reducing efficiency by 20 to 30 percent within two years if you skip maintenance. Standard tank heaters tolerate hard water better because the sediment settles at the bottom rather than coating a heating surface, but the anode rod depletes faster in mineral-rich water, leaving the steel tank vulnerable to corrosion. Heritage Plumbing San Jose factors your local water hardness into every recommendation and explains whether a whole-house softener or point-of-use filter makes sense for your system choice.
San Jose adopted updated plumbing code provisions in 2022 that require seismic shut-off valves on all new gas appliance installations in seismic zone 4. Your water heater replacement must include earthquake-rated flexible connectors and dual-strap restraint systems anchored to structural framing. We stay current with these amendments and ensure every installation meets the latest standards. That compliance protects you during a seismic event and prevents problems when you sell the home, because buyers' inspectors will flag outdated installations. Choosing a local plumber who understands San Jose's specific code requirements saves you from costly re-work and gives you confidence that your system is safe and legally compliant.
