---
title: "Tank to tankless water heater swap"
description: "Before and after photos of a tank to tankless water heater swap: gas line upsized, new venting, 2 plumbers, 5 h on site."
url: "https://plumbo-astro.pages.dev/projects/tankless-water-heater-swap/"
date: "2026-09-09"
---

# Tank to tankless water heater swap

> Before and after photos of a tank to tankless water heater swap: gas line upsized, new venting, 2 plumbers, 5 h on site.

## The job

A 15-year-old gas water heater had started to weep from the bottom of the tank. The family of five also ran out of hot water most mornings and wanted a unit that would keep up.

## What we did

Two plumbers drained and removed the old tank, then checked the gas supply: the existing line was too small for the new burner, so it was upsized from the meter. The tankless unit went on the wall with new venting through the outside wall and isolation valves for yearly flushing. Every gas and water joint was tested before the unit was fired.

## The result

Hot water now runs without a break through back-to-back showers, and the utility room has floor space again. The owner got the flushing steps and the warranty papers on the day.