Water Heater Frequently Asked Questions

Common signs include:

• Rust-colored hot water

• Water leaking around the base

• Inconsistent water temperature

• Running out of hot water quickly

• Rumbling or popping noises

• Higher utility bills

• Frequent repairs

• The unit is over 10–12 years old

While some issues can be repaired, an aging water heater with multiple problems is often best replaced.

Mineral deposits naturally settle to the bottom of the tank over time. As the burner heats the water beneath the sediment, trapped moisture creates popping, crackling, or rumbling sounds.

This buildup makes the water heater work harder, decreases efficiency, shortens its lifespan, and can eventually damage the tank.

Several issues can reduce your hot water supply, including:

• A failing heating element

• A broken thermostat

• Sediment buildup inside the tank

• An undersized water heater

• A damaged dip tube

• High household demand

A professional inspection can determine whether a repair or replacement is the better option including tankless water heater options.

Most manufacturers recommend flushing a traditional water heater once a year.

Regular flushing removes sediment that collects inside the tank and helps:

• Improve efficiency

• Extend the life of the water heater

• Reduce noise

• Lower energy costs

• Improve heating performance

Homes with hard water may benefit from more frequent maintenance. If your water heater is over 5 years old and has not been flushed before, it is not recommended to have your water heater flushed as it could cause unwanted damage from excessive sediment build up.

For most homes, 120°F provides an ideal balance between safety, comfort, and energy efficiency.

Higher temperatures can increase the risk of scalding while also increasing energy consumption. Some households with specific health concerns may require higher settings, but these situations should be discussed with a plumbing professional.

Rust-colored hot water may indicate:

• Corrosion inside the water heater tank

• A failing anode rod

• Corroded plumbing pipes

If only the hot water appears rusty, the water heater is often the source. A plumber can determine whether replacing the anode rod or the entire water heater is appropriate.

An anode rod is a sacrificial metal rod installed inside your water heater.

Its purpose is to attract corrosion before it attacks the steel tank itself. Replacing the anode rod when needed can significantly extend the life of your water heater.

Many homeowners don’t realize this inexpensive component plays one of the biggest roles in protecting the tank and can be replaced. We also offer installation of electric anode rods that could last much longer on your water heater.

Leaks can come from several locations, including:

• Loose plumbing connections

• Temperature and pressure relief valve

• Drain valve

• Expansion due to high pressure

• Corrosion inside the tank

A leaking tank itself usually cannot be repaired and often requires replacement.

If you notice water around your water heater, it’s best to have it inspected promptly before additional damage occurs.

Replacement is often the better investment if:

• The tank is leaking.

• The unit is over 10 years old.

• Repairs are becoming frequent.

• Energy efficiency has declined.

• You regularly run out of hot water.

Newer models are typically more efficient and reliable.

Traditional tank water heaters store hot water in a large insulated tank that’s ready whenever you need it.

Tankless water heaters heat water only when you turn on a faucet, providing virtually endless hot water while reducing standby energy loss.

Both systems have advantages depending on your home’s size, budget, and hot water usage. Read more about tank vs tankless —> here.

Yes.

Hard water contains minerals like calcium and magnesium that collect inside the tank.

Over time, mineral buildup can:

• Reduce efficiency

• Increase heating time

• Create noise

• Wear out heating elements

• Shorten the life of the water heater

A water softener can help reduce mineral buildup in many homes.

Possible causes include:

• Failed heating element

• Faulty thermostat

• Sediment buildup

• Incorrect temperature setting

• Gas burner problems

• Electrical issues

A licensed plumber can diagnose the exact cause and recommend the appropriate repair.

The correct size depends on:

• Number of bathrooms

• Household size

• Simultaneous hot water usage

• Appliances

• Peak demand

Installing a water heater that’s too small often results in running out of hot water, while one that’s too large may increase operating costs.

At Ramblewood Plumbing we offer custom solutions for your home’s needs. Call today for a free estimate.

A thermal expansion tank helps protect your plumbing system from increased pressure caused by heated water expanding inside a closed plumbing system.

Many homes with a pressure reducing valve (PRV), backflow preventer, or check valve require an expansion tank to protect the water heater and plumbing fixtures from excessive pressure.

Yes.

High water pressure places extra stress on:

• Water heater tanks

• Valves

• Plumbing fixtures

• Supply lines

• Appliances

Over time, excessive pressure can shorten the life of your plumbing system and increase the likelihood of leaks. Watch our master plumber, Mike Hancock explain more about high water pressure —> HERE.

Although some homeowners consider DIY installation, water heaters involve:

• Gas or electrical connections

• Venting requirements

• Plumbing connections

• Pressure relief systems

• Building codes

• Manufacturer warranty requirements

Professional installation helps ensure your system operates safely and complies with local codes. At Ramblewood we are fully licensed, insured, and bonded. We can pull the proper permit to ensure your home is up to code and protected. Watch our licensed professionals walk through a water heater installation —> HERE.

A sulfur smell often results from a reaction between naturally occurring bacteria and the water heater’s anode rod.

The issue may sometimes be resolved by replacing the anode rod, disinfecting the water heater, or evaluating your home’s water quality.

Simple maintenance can significantly extend the life of your water heater:

• Flush the tank annually.

• Inspect the anode rod.

• Test the temperature and pressure relief valve.

• Monitor water pressure.

• Install an expansion tank if needed.

• Address small leaks promptly.

• Consider water treatment if you have hard water.

Preventive maintenance is almost always less expensive than emergency replacement.

Contact a plumber if you notice:

• Water leaking around the unit

• No hot water

• Rusty hot water

• Loud rumbling noises

• Pilot light or ignition problems

• Burning smells

• Fluctuating water temperatures

• Low hot water pressure

• Frequent cycling

• Water heater over 10 years old with ongoing issues

Prompt service can often prevent more extensive damage and help you decide whether repair or replacement is the best long-term solution.

Whether you need a repair, replacement, routine maintenance, or simply have questions about your home’s hot water system, Ramblewood Plumbing Company is here to help. We proudly serve homeowners throughout St. Louis City, St. Louis County, Jefferson County, and St. Charles County with honest recommendations, quality workmanship, and dependable service.

If you’re experiencing water heater problems or want advice on the best solution for your home, contact Ramblewood Plumbing Company today to schedule an appointment.