Pride Plumbing came out and performed a descaling service on a Navien tankless water heater (this included cutting the power off to the unit from the breaker along with cutting off the water at the water meter, removing the unit’s skirt, mixing a bucket of water with Rectorseal 68708 Calci-Free Tankless Water Heater Flush, letting it run through the unit for about 45 minutes to an hour, flushing the heater with just water, and then reattaching the unit's skirt). After restoring power and water to the unit, we tested it for proper operation with no issues.
