Hot Water Tanks | McMaster-Carr

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174 Products

Water Heaters

An adjustable thermostat automatically turns the heater on when the temperature drops below your set temperature and off when it rises above your set temperature.

Heating Elements for Electric Water Heaters

Thermostats for Electric Water Heaters

Replace the thermostat on your water heater.

Pilot-Light Thermocouples for
Natural Gas Water Heaters

Point-of-Use Water Heaters

Also called tankless water heaters, these provide hot water on demand and take up less space than heaters with a tank.

Heat Exchangers

Also known as shell and tube heat exchangers, these transfer heat using liquid or steam that flows through the shell to heat or cool liquid in the tubes.

High-Efficiency Heat Exchangers

Stacked, corrugated plates maximize contact with liquid or steam flowing through these brazed plate heat exchangers for faster heat transfer than shell and tube heat exchangers.

High-Pressure Heat Exchangers

With more than three times the pressure rating of standard heat exchangers, these are often used for high-pressure condensing, evaporating, heating, and cooling. They are also known as shell and tube heat exchangers.

Heat Exchangers for Sampling

Cool hot liquid samples to safe temperatures for testing. These heat exchangers are often used to monitor boiler water quality without shutting down the system.

Open-Tank Heat Exchangers

Place these heat exchangers in open tanks to heat or cool their contents by transferring heat from water or steam that flows through passageways in the panel.

Pressure and Vacuum Control

Expansion Tanks for Water

Use these tanks to accommodate the expansion of heated water and provide a cushion of compressed air in closed water-heating systems.

Expansion Tanks for Drinking Water

These tanks meet NSF/ANSI Standard 61 for use with drinking (potable) water.

ASME-Code Expansion Tanks for Water

Manufactured in accordance with ASME codes.

Expansion Tanks for Lubricants

A rolling rubber diaphragm maintains tank pressure at or near 0 psi, which extends seal life to help keep lubricants clean.

Pressure-Rated Water Tanks

These tanks can be used as water heaters when used with a heat source, such as an immersion heater.

Heating, Venting, and Air Conditioning

HVAC Flame Detectors

Replace damaged flame detectors in HVAC equipment, such as furnaces and boilers, as well as some water heaters and ovens.

Horizontal Flow Hazardous Location
Large-Space Steam Heaters

Use steam from your existing boilers to evenly warm a large space.

Horizontal Flow Hazardous Location
Large-Space Steam and Water Heaters

Evenly warm a large space with steam and water from your existing boilers.

Vertical Flow Hazardous Location
Large-Space Steam and Water Heaters

Focus warm air in a specific spot.

Vertical Flow Large-Space
Steam and Water Heaters

Focus warm air in a specific spot.

Horizontal Flow Large-Space Steam Heaters

Use steam from your existing boilers to evenly warm a large space.

Horizontal Flow Large-Space
Steam and Water Heaters

Evenly warm a large space with steam and water from your existing boilers.