When Good Intentions Go Wrong:

Recently, we visited a home where the owners proudly showed us their new gas tankless water heater. Instead of the old 50-gallon tank in the garage, they had upgraded to a sleek, space-saving tankless system. Their reason made sense: the traditional tank took up too much room, and they wanted their home to look cleaner and more stylish.

The catch? The homeowner’s father had installed the water heater. With the best intentions, he chose to hide it in a bathroom closet to keep it out of sight and unvented. Unfortunately, that’s where good intentions turned into a serious problem.

What the Plumbing Code Says

According to the International Residential Code (IRC) and the Uniform Plumbing Code (UPC), fuel-fired water heaters cannot be installed in a bathroom or bedroom closet unless the closet is specifically designed for the appliance and properly vented.

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* For example:

IRC Section G2406.2 (303.3) states:

"Appliances shall not be located in sleeping rooms, bathrooms, toilet rooms, storage closets, or surgical rooms, or in a space that opens only into such rooms or spaces."

Exceptions only apply if the closet is properly sealed and directly vented to the outside.

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Why does this matter? A gas water heater produces carbon monoxide and other exhaust gases. If installed in the wrong location, dangerous fumes could leak into the living space. That’s not just a code violation—it’s a life-threatening risk.

The Risks of “Handyman” Installations

It’s natural to want to save money, especially when a family member or friend offers to help. But when it comes to plumbing, electrical, or gas work, the risks outweigh the savings. Here’s why:

Safety Hazards – Incorrect installation can lead to gas leaks, carbon monoxide poisoning, flooding, or even fire.

Code Violations – Unpermitted work can result in failed inspections, fines, or costly corrections when you go to sell the house.

Voided Warranties – Many manufacturers require installation by a licensed professional for warranties to remain valid.

Insurance Issues – If a problem arises and the work was not done by a licensed pro, your homeowner’s insurance may not cover the damage.

Resale Value – Future buyers (and inspectors) will flag unpermitted or unsafe installations, potentially lowering your home’s value.

Why a Licensed Pro Matters

Licensed plumbers aren’t just there to do the labor—they bring knowledge of building codes, safety standards, and proper installation practices. They ensure the system is vented, sized, and connected correctly so you don’t face costly surprises down the road.

A vetted, licensed professional also gives you:

• Peace of mind knowing the work is safe and up to code.

• Documentation you’ll need if you sell your home.

• Accountability if something goes wrong.

Bottom line: Even when a loved one means well, DIY gas or plumbing work is a gamble you don’t want to take. Protect your family, your home, and your investment by hiring a licensed professional who knows the codes and does the job right the first time.