ProMax® Plus High Recovery 98-Gallon Gas Water Heater

ProMax® Plus High Recovery 98-Gallon Gas Water Heater

Model PCG-100

ProMax Plus High Recovery Gas Tank Water Heater PCG-100 is rated 4.3333 out of 5 by 3.
Rated 4 out of 5 by from No complaints (see comments) Was a replacement for a previous AO 100 Gal 75K BTU that we had for 14 years.Retailed for $2300 with taxes.One point: dimensiions are slightly different so connecting pipes had to be manually cut back 3/4" for feed and supply pipe that added extra time to the installation. A.O. should trying to be consistent with things like this.Another point: the anodes are solid and should be of chain linked. I say this because this heater went into a standard height room and cannot be removed. A.O. should provide a method of inspection of the anodes so I can get optimum use of the heater. As it stands with no method of inspection I have to hope and pray the anodes are not used up!
Date published: 2014-11-08
Rated 4 out of 5 by from Excellent I have been using AO Smith hot water for the past 20 years .I have to say every place I own i have good report about the Hot Water Heater
Date published: 2014-08-22
Rated 5 out of 5 by from Great overall this is the 2nd one that I installed at the same address. 11 years apart.
Date published: 2013-09-05
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The Promax® Plus High Recovery gas water heater is designed for reliable performance, reduced NOx emissions and has 80% thermal efficiency.

Featuring a 98-gallon tank and a 75,100 BTU gas burner, the PCG-100 standard vent delivers a thermal efficiency of 80%, and a recovery rate of 81 gallons per hour. It carries a 10-year limited warranty, and meets Low NOx emission requirements.

Where to Buy

Where to Buy

Woodbridge, NJ 07095

Location #1


Edison, NJ

Se Habla Español

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Location #2

William J. Guarini Plumbing

Jersey City, NJ

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Location #3

Authorized Heating

Brooklyn, NY

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View All List My Company Here

Product Features & Options

Highest Recoveries

Capacity/input combinations up to 98 gallons/75,100 BTU's produce recoveries up to 81 gallons per hour.

Fully Automatic Control System

Auto-reset gas shutoff device prevents excessive water temperature

Green Choice® Gas Burner

Patented eco-friendly design reduces NOx emissions by up to 33% and complies with low emissions of less than 40 ng/J.

DynaClean™ Diffuser Dip Tube

Thanks to the improved technology, the inlet tube features water jets that redirect incoming cold water into the tank, creating turbulence, which helps reduce lime build-up, therefore maintaining heater efficiency.

How it Works

Gas water heaters heat water by burning either natural gas or LP (propane). Gas water heaters need a source of air and also need to be vented properly. Cold water enters the water heater through an internal “dip tube” which forces the cold water to the bottom of the tank and pushes hot water out through the outlet connection. This arrangement provides the most hot water for a given tank size. Most gas water heaters use a pilot light. The pilot light on some models also generates the power needed to operate an electronic gas valve. When cold water enters the tank, the temperature sensor on the gas control tells the main gas valve to open. Gas flows to the burner where it is lit by the pilot light. The air needed by the burner is supplied by the room where the water heater is installed. The exhaust gases are vented to the outside. When the proper temperature is reached, the main gas valve shuts off. Because water can corrode the steel tank, we glass line the inside of the tank and install an anode rod to help reduce corrosion. The temperature and pressure relief valve is a safety device designed to open if the internal temperature or pressure of the tank exceeds certain limits. Water heaters should be large enough to provide adequate hot water even when temperatures are cold and household demand is greatest.




limited warranty


thermal efficiency

CSA International Low Lead Content Certification in compliance with U.S. and Canadian safety standards on gas components
ASME American Society of Mechanical Engineers
The Blue Diamond formula is enriched with a high level of zircon, producing a coating that is harder and more water-resistant than any other in the industry
CSA International Design Certification The CSA Blue Star indicates the product is certified to applicable U.S. standards for appliances using gas or other petroleum fuel

Product Specifications

Tech Specs
Gallon Capacity: 98
Recovery Gallons: 81
Maximum BTUs: 75,100
Standby Loss BTUs per Hour: 998
Power Source: Natural Gas
Thermal Efficiency: 80%
Limited Tank Warranty: 10 Years
Limited Parts Warranty: 6 Years
Anode: Coregard™ Aluminum Anode
T&P Relief Valve: Yes
Ignition Type: Piezo
Water Connection Location: Top
Water Connection Size: 3/4"
Emissions: Low NOx
Dimensions & Venting
Type: Tall
Height: 65"
Height w/Draft Hood: 65"
Diameter: 27 3/4"
Width: 27 3/4"
Depth: 27 3/4"
Shipping Weight: 350lbs/159kg
Vent Type: Standard Vent


Rebate and incentive programs provide cash-back to consumers for the purchase of appliances that meet certain energy efficiency standards. Often, these standards are tied to the ENERGY STAR® program.

Cash for Appliances is designed to encourage the purchase of energy efficient appliances. Consumers who purchase ENERGY STAR® or CEE qualified appliances can receive cash rebates. Most states are offering rebates in the $50 to $250 range.


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Need More Hot Water?

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