Dual Rinnai Gas Tankless Water Heater Installation in Tampa, FL
Earlier this season in Tampa, FL, our plumbing team was called out to replace a pair of aging tankless water heaters that were no longer delivering consistent hot water. After a full inspection of the existing plumbing system, gas lines, venting layout, and water pressure, we determined that upgrading to two high-efficiency Rinnai RU199iN natural gas tankless water heaters would provide the property with reliable on-demand hot water and better overall energy performance.
We began by safely shutting off the gas supply, disconnecting the electrical components, and carefully removing the old tankless units from the wall. Using professional plumbing tools such as adjustable pipe wrenches, a digital gas manometer, PEX cutters, and proper thread sealants, we brought all water and gas connections up to current plumbing code. Once the wall was cleared and prepped, we verified venting clearances and combustion air requirements to ensure a safe and long-lasting tankless water heater installation.
With the area prepared, we mounted the two Rinnai RU199iN gas tankless water heaters and installed isolation valves (iso valves) on the hot and cold water lines. These isolation valve kits are crucial for future service, flushing, and descaling of the tankless heat exchangers, especially in areas with hard water. We pressure-tested all connections, checked for leaks, verified gas BTU input, and calibrated the Rinnai control settings to provide stable, comfortable water temperatures throughout the home.
After startup and testing, the new on-demand hot water system delivered steady hot water to multiple fixtures at once with ease. As licensed plumbers specializing in tankless water heater replacement, gas line plumbing, and hot water system upgrades in Tampa, FL, we take pride in clean, organized installations that are easy to service and built to perform for years. Below are a few snapshots from the job, showing the layout, mounting, and finished plumbing work on this dual Rinnai gas tankless system.
Mounting the New Rinnai Tankless Units
In this image, you can see the new Rinnai gas tankless water heaters securely mounted to the wall after the old units were removed. We carefully laid out the gas line, cold water supply, hot water distribution, and condensate drainage to keep the installation clean and service-friendly. Proper spacing, anchoring, and support are essential on any tankless water heater installation to protect the heat exchangers and ensure safe venting and gas plumbing connections.
Copper Piping & Isolation Valve Layout
This photo focuses on the copper piping work and the installation of isolation valves on the hot and cold sides of the tankless system. These valves allow a plumber to quickly shut off, flush, and descale the tankless water heater without disrupting the entire plumbing system. Precision soldering, proper support of the copper lines, and correct valve orientation help ensure leak-free connections and long-term durability for this gas tankless water heater replacement.
Completed Dual Tankless System
The finished installation shows a clean, organized layout with both Rinnai tankless water heaters piped in and ready to deliver endless hot water. After completing all gas pressure tests, venting checks, and temperature calibration, we verified performance at multiple fixtures to confirm proper flow and recovery. This professional tankless water heater installation provides high-efficiency hot water, reduced standby loss, and a system that can be easily maintained with regular flushing and inspection by a qualified plumber.