Rheem 621852 Natural Gas Water Heater 40000 Btu 40 Gallon

Product Description

The RHEEM 621852 is a residential natural gas tank water heater rated at 40,000 BTU/h with a 40-gallon capacity. Built on the PROG40S-40N-RH62 model platform, this short-profile tank delivers reliable hot water supply for residential applications. The unit stands 63.25 inches tall with a 21-inch diameter, making it suitable for installations where vertical clearance is available but a reduced footprint is required. It is fueled by natural gas and is installed by licensed plumbers or qualified gas technicians following applicable local codes. The gray exterior finish and tank-style design follow standard residential water heater conventions.

This unit is designed for residential installations requiring a natural gas tank water heater with moderate capacity. The 40-gallon tank and 40,000 BTU/h input rating make it appropriate for small to medium households. The short tank profile accommodates spaces where a standard-height unit may not fit. Installation is performed by a licensed plumber or gas technician and must conform to local plumbing and gas codes, including the International Fuel Gas Code where adopted.

Key Features

• 40,000 BTU/h natural gas input for efficient residential water heating
• 40-gallon tank capacity suitable for small to medium household demand
• Short tank configuration at 63.25 inches tall by 21 inches in diameter
• Tank-style design provides a continuous hot water reserve
• Residential application class for standard home installations

Compatibility

Designed as an OEM residential natural gas tank water heater under RHEEM model number PROG40S-40N-RH62. Intended for residential new-installation and direct-replacement applications requiring a 40-gallon short natural gas tank unit.

Installation Notes

Installation must be performed by a licensed plumber or qualified gas technician in accordance with local codes and the International Fuel Gas Code. Shut off the gas supply and cold water inlet before disconnecting any existing unit. All gas connections must be leak-tested after installation using an approved leak-detection solution. Do not operate the unit without the tank fully filled with water.

Technical Specifications

• Fuel Source: Natural Gas
• Input Rating: 40,000 BTU/h
• Tank Capacity: 40 gallons
• Application Class: Residential
• Water Heater Type: Tank
• Tank Profile: Short
• Height: 63.25 inches
• Diameter: 21 inches
• Color: Gray
• Model Number: PROG40S-40N-RH62
• UPC: 020352621852

Standard Information

• Brand: RHEEM
• Manufacturer Part Number: 621852