How to Install a New Water Heater in Willingboro, NJ

To install a new water heater, a plumber shuts off power or gas and water, drains the old tank, disconnects it, sets the new one, connects water and fuel, fits the T&P valve and venting, fills the tank, then tests. Each step has a safety reason. The order matters more than the speed.

This guide explains how the work is done, not how you should do it yourself. New Jersey law reserves most plumbing work for licensed people, and gas and venting mistakes can hurt someone.

The steps a licensed plumber follows

1. 1

   Shut off and drain

   Turn off power or gas, close the cold supply valve, then drain the old tank through a hose to a floor drain.

2. 2

   Disconnect and remove

   Disconnect water lines, the gas line or electric whip, and the vent. Move the old tank out.

3. 3

   Set the new tank

   Place it on a drain pan with a discharge line and level it. Check clearance from the wall and the vent.

4. 4

   Connect the water

   Fit new shutoff valves, flexible connectors and, where required, an expansion tank on the cold side.

5. 5

   Fit the T&P valve

   Install the temperature and pressure relief valve and run its discharge pipe downward, ending near the floor or as local rules require.

6. 6

   Connect fuel and vent

   For gas, connect the line and leak test every joint. For electric, connect the wires and confirm breaker size.

7. 7

   Fill, purge and test

   Open a hot tap, fill the tank completely, then turn on power or gas. Check for leaks, temperature and proper venting.

Sizing the tank and picking the fuel

Tank size follows household demand. A common starting point is about 40 gallons for one or two people and 50 gallons or more for a larger family, though peak use matters more than headcount. Count bathrooms, the dishwasher, the washer and how often people shower back to back.

Fuel type usually stays the same unless the owner pays for new gas piping, venting or a new electric circuit. Changing from electric to gas, or the reverse, turns a simple swap into a larger job. A water heater installation quote should name every one of those items.

Gas, venting and the checks that matter

On a gas heater, the vent carries combustion gases outside, and it needs the right slope and size to draw properly. A plumber checks that the flue is secure, that nothing blocks it and that the room has enough air. Every gas joint is tested for leaks before the unit is put in service.

On an electric heater, the main risks are the wrong breaker or wire size and a loose connection at the terminals. Both can overheat. This is another reason the work belongs with a licensed professional.

Why many owners hire this out

N.J.S.A. 45:14C-1 says plumbing shall be performed only by a master plumber or an authorized plumbing contractor, or their W-2 employees. Ask any plumber you hire for the master plumber license, and check it with the NJ State Board of Examiners of Master Plumbers. Questions about exceptions belong with the Board, not with a neighbor.

A swap in the same spot with the same fuel is the simplest case. Moving the heater, changing the fuel or adding a venting run is different, and it raises both the labor and the permit questions. Delran and Westampton homeowners ask us the same thing before a swap.

After the install

• Set the thermostat to a safe temperature. Many households use about 120 degrees Fahrenheit.
• Label the water and gas shutoffs so anyone in the house can find them.
• Keep the permit paperwork if one was issued, along with the manual and warranty card.
• Plan to flush the tank once a year to reduce sediment.

What shapes the installed price

Questions from Willingboro homeowners

We install heaters in Delran and Westampton as well. Before a visit, photograph the old data plate and note the room's door width, since both speed up the quote.