Water heater installation

A like-for-like tank swap in an accessible location is typically three to five hours, including draining the old unit, removing it, fitting and connecting the new one, filling, purging air and commissioning. Add time for venting changes, gas or electrical work, relocation, or a difficult route in and out. A tankless conversion is usually a full day and sometimes two.

It depends on three things: whether your gas supply can feed it, whether a vent path exists, and how long you plan to stay. Tankless gives endless hot water, a twenty-year life and a much smaller footprint, but the installed cost is roughly double and the gas and venting work is where the surprises live. In a house you will own for fifteen years with adequate gas, it is a strong choice. For a two-year hold, it is not.

Match the first-hour rating to your peak-hour demand rather than choosing by tank size alone. As a rough guide: 40 gallons of gas or 50 electric for a family of three with two baths; 50 gas or 65 to 80 electric for four or five people with three baths. A large soaking tub overrides all of that. Size to the tub. And electric always needs more capacity than gas for the same household because it recovers roughly half as fast.

In an unconditioned basement or garage, often yes. It runs at about a third of the energy of an electric resistance tank, lasts longer, and dehumidifies the space. Genuinely valuable in a Virginia summer. It costs more upfront, makes some noise, needs around 700 cubic feet of air, and needs a condensate drain. Federal and utility incentives frequently close much of the price gap, so check what is current before deciding.

Yes, in Virginia localities this is permitted work, and it is worth having. The inspection checks venting, relief valve discharge and gas connections. The items that cause injuries rather than inconvenience. Unpermitted installations can also void the manufacturer warranty and complicate insurance and resale.

It is a small tank with an internal bladder that absorbs the volume increase of water as it heats. You need one if your house has a pressure reducing valve, because that makes the plumbing a closed system with nowhere for expansion to go. Without it, pressure spikes on every heating cycle, the relief valve drips, and the tank is stressed continuously. Most Virginia houses need one.

It is legal for a homeowner to work on their own residence in most Virginia localities, and permits are available to homeowners. But gas connections, venting and relief valve piping are the three areas where errors cause carbon monoxide exposure or a pressure vessel failure, and they are not intuitive. If any part of the job involves gas or a vent change, this is not the right project to learn on.

120 degrees suits most households: hot enough to inhibit bacterial growth in the tank, cool enough to reduce scald risk, and it slows scale formation. Some households run 140 for specific health reasons, which requires thermostatic mixing valves at fixtures to prevent scalding. Do not run the tank hotter simply to stretch capacity. That is a burn risk substituting for correct sizing.

It changes what a failure costs, so it should change the installation. A pan with a properly piped drain to the exterior is essential, a leak sensor with an automatic shutoff valve is strongly worth the money, and a smaller-diameter unit may be needed for the access hatch. If there is any option to relocate to a garage or basement during replacement, take it.

Often, yes, for common tank sizes and fuel types. Where a like-for-like replacement is available, an emergency swap is usually same-day. Non-standard capacities, tankless conversions, and jobs needing gas or electrical work generally need at least a day of lead time, and a conversion needs a survey first.