# From a Rheem Gas Water Heater to an Ariston Heat Pump Water Heater in Sacramento

Published: 2026-04-05
Source: https://www.superbrothers.com/from-a-rheem-gas-water-heater-to-an-ariston-heat-pump-water-heater-in-sacramento/

This project started with an older Rheem gas water heater in a Sacramento garage and ended with a new Ariston heat pump water heater installed in the same space. A conversion like this involves more than swapping one tank for another. The gas line has to be shut down and capped, the electrical system has to support the new unit, and the plumbing has to be updated so the new water heater can run safely and efficiently.

Here is a step by step look at how the job came together.

## 1. The original Rheem gas water heater

The existing unit was a Rheem gas water heater installed on a raised platform in the garage. This setup [had been in place for years](<https://www.superbrothers.com/upgrade-your-home-with-the-perfect-water-heater-replacement-a-comprehensive-guide/>) and used a standard gas connection and venting arrangement. Before any new equipment could go in, the old tank had to be disconnected and removed.

![rheem gas water heater in sacramento garage](<https://www.superbrothers.com/files/media/2026/04/gas-to-heatpump-conversion-water-heater-replacement1.webp>)

## 2. Disconnecting the gas supply

One of the first steps in a gas to heat pump conversion is shutting down the gas connection safely. Once the old heater is taken out, the gas line can no longer be left open or reused casually. It has to be properly closed off as part of the conversion.

![water heater gas line connection](<https://www.superbrothers.com/files/media/2026/04/gas-to-heatpump-conversion-water-heater-replacement2.webp>)

## 3. Capping the old gas line

After the Rheem gas unit was removed, the gas line was capped to make the abandoned connection safe. This is a key part of the job whenever a home moves from a gas water heater to an electric heat pump model.

![water heater gas line connection capped off in prep for heat pump installation](<https://www.superbrothers.com/files/media/2026/04/gas-to-heatpump-conversion-water-heater-replacement3.webp>)

## 4. Preparing the electrical system

A heat pump water heater needs dedicated electrical service, so the panel has to be checked and wired correctly for the new load. This part of the project is what makes a fuel conversion different from a simple replacement. The home has to be ready to power the new system before installation is complete.

![electrical panel wired for heat pump water heater in sacramento house](<https://www.superbrothers.com/files/media/2026/04/gas-to-heatpump-conversion-water-heater-replacement10.webp>)

## 5. Installing the new Ariston heat pump water heater

With the old Rheem gas water heater removed and the utilities prepared, the new Ariston heat pump water heater was set in place and secured. The finished installation gives the space a much cleaner look and replaces combustion equipment with a high efficiency electric system.

![heat pump installed and strapped](<https://www.superbrothers.com/files/media/2026/04/gas-to-heatpump-conversion-water-heater-replacement11.webp>)

## 6. Adding the expansion tank

The updated plumbing setup included an expansion tank, which helps manage pressure changes in the system as the water heats. This is one of those details that makes the installation cleaner and more complete, especially when bringing an older setup up to current standards.

![heat pump expansion tank](<https://www.superbrothers.com/files/media/2026/04/gas-to-heatpump-conversion-water-heater-replacement12.webp>)

## 7. Final electrical disconnect and finishing details

Near the finished unit, a wall mounted disconnect was installed for safe service access. This gives the new Ariston heat pump water heater a proper shutdown point and completes the electrical side of the project in a clean, professional way.

![heat pump breaker switch installed on the wall](<https://www.superbrothers.com/files/media/2026/04/gas-to-heatpump-conversion-water-heater-replacement14.webp>)

## Result

This [Sacramento project](<https://www.superbrothers.com/cities/sacramento/>) is a good example of what a real gas to heat pump conversion looks like. The home went from an older Rheem gas water heater to a new Ariston heat pump water heater with updated electrical service, capped gas piping, and improved plumbing connections. The result is a safer, cleaner, and more energy efficient hot water system built for long term performance.

## About Super Brothers Plumbing Heating & Air

Super Brothers Plumbing Heating and Air is the company to call for HVAC repair, installation, and replacement, whole-home repipes, and water heater replacements if you want the best deals and service with warranty.

We send experienced tradesmen to fix a broken HVAC unit or tackle a hot water heater replacement before it ruins your drywall. With over 1,000 verified online reviews, we are growing and helping Sacramento and San Jose communities experience better service, better pricing, and more personal, human-first support than large corporate providers. You can hire us for major projects or small fixes. No work starts on your property until you approve the upfront price.

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