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Ships within 48 hours · Estimated delivery Jul 20 - Jul 25
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Description
100 Gal. Universal Heavy Duty 399.9K BTU Commercial Natural Gas ASME Tank Water HeaterRheem Commercial Universal Gas Water Heaters are designed to fit into tight retrofit applications and have the features and capacity to meet heavy duty demands. The tighter the commercial retrofit, the more you will appreciate how the Universal's compact size and multiple water connections simplify installations. Please Note: This model requires a 120 Volt power source. California residents see Prop 65 WARNINGS California and Utah residents (Utah
Rheem Commercial Universal Gas Water Heaters are designed to fit into tight retrofit applications and have the features and capacity to meet heavy duty demands. The tighter the commercial retrofit, the more you will appreciate how the Universal's compact size and multiple water connections simplify installations. Please Note: This model requires a 120-Volt power source.- California residents
- California and Utah residents (Utah effective 7/1/18): this water heater does not meet ULTRA LOW NOX (ULN) emissions requirements, regulations prohibit the sale, shipment or installation of this water heater in any air quality district that requires ULN water heaters
- Texas residents: this water heater does not meet Low NOX (LN) emissions requirements. regulations prohibit the sale, shipment or installation of this water heater in any air quality district that requires Low NOX water heaters
- Space saver design: the short heights and narrow jacket diameters, plus the top, front and rear water inlets/outlets offer the ultimate in installation flexibility
- System sentinel LED diagnostic system: our exclusive diagnostic system, with glowing LED lights, verifies system operation sequence by sequence
- Strong tank design: universals proprietary steel formulation, patented multi-flue design, combined with 2 coats of porcelain enamel, results in a superior heat exchanger design
- Stainless steel burners: precision burners, raised port design, are formed from high chromium stainless steel; each burner assembly slides out like a drawer for quick inspection and maintenance
- Low profile automatic flue damper: low profile damper minimizes overall product height and heavy-duty vent hood supports are designed to withstand the rigors of installation
- Easy to service: factory installed full port, full flow brass drain valve allows for faster draining and servicing and hand-hole cleanout for easy removal of lime/sediment deposits
- Direct spark to pilot ignition system: saves energy by igniting only when there is a call for heat
- Built-in corrosion resistance: patented anode design utilizes multiple magnesium rods to ensure corrosion resistance for a long tank life
- Fully insulated: energy saving sag and moisture proof fiberglass insulation surrounds the storage tank and heavy mineral wool insulation surrounds the combustion chamber
- Insulation: sag and moisture proof fiberglass insulation surrounds the storage tank and heavy mineral wool insulation surrounds the combustion chamber
- Gas control system: thermostat adjusts from 100°F to 180°F, 24-Volt combination gas valve includes main gas pressure regulation, on-off manual valve, 120/24-Volt transformer and high limit temperature cut-out
- Need a different configuration, no problem; our universal line offers water heaters in 35 Gal. to 100 Gal. models available in a range BTU/h in natural gas and liquid propane
- Call 1-855-400-2552 before noon for same-day installation service in most areas, or
Features
| Item Weight | 770 |
| Uniform Energy Factor | 0 |
| Returnable | 90-Day |
| BTU Rating | 399900 |
| Tank Lining Material | Glass |
| Commercial/Residential | Commercial |
| Application Type | Commercial |
| Tank Warranty | 3 Year |
| Wattage (watts) | 0 |
| Maximum Temperature (F) | 180 |
| Water Heater Profile | Tall |
| Finish Family | Gray |
| Water Heater Features | Overheat Protection,Temperature Pressure Relief Valve |
| Minimum Temperature (F) | 70 °F |
| Indoor/Outdoor | Indoor |
| Fuel Type | Gas |
| Product Weight (lb.) | 770 lb |
| Pack Size | 1 |
| Vent Type | Atmospheric |
| Recovery Rate at 90F Rise (gallons/hour) | 431 |
| Nominal Tank Capacity (gallons) | 100 |
| Household Size | 5+ |
| Product Height (in.) | 76 in |
| Water Connection Size (in.) | 1.5 in Top, 2 in Side |
| Product Width (in.) | 30.25 in |
| Product Depth (in.) | 30.25 in |
| Tank Valve Size (in.) | 1.0 |
| Part Warranty | 1 Year |
| Labor Warranty | No Warranty |
| Certifications and Listings | CSA Listed,UL Listed |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.6 ★★★★★
Based on 17 reviews
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Product Reviews
★★★★★ 5
MUST BUY Item for Breastfeeding Moms
Size: Standard (18-Inch), Color: Dark Grey
MUST GET item for breastfeeding moms. It is a soft pillow with a removable washable cover. The material is like a suede, which can make it hot to lean on if you typically feel hot when breastfeeding or sleeping. It allows you to sit up straight while in bed with great support.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 1, 2026
★★★★★ 5
It's perfect support.
Size: Extra Back Support (21-Inch), Color: Dark Grey
The best way to describe the super comfy reading pillow is super comfy. I use it to sit up while watching something soothing to my mind on tv and due to its comfyness and softness, it's perfectly just right for my back. The funny thing is within a few minutes I'm knocked out sleep, which is a good thing. It's soft but firm lumbar area and arms feels oh so comfortable. It gives the best sleep quality and less toss and turning. I highly recommend.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 7, 2026
★★★★★ 4
Great Size and Comfort
Size: Extra Back Support (21-Inch), Color: Dark Grey
2 months after buying a different reading pillow I felt it was time to buy a different one based on the comfort and support. I found this one listed for a good price. After carefully looking through the listing, I bought the 21" size. On my first night of usage, I was already impressed with the comfort and support vs the reading pillow I had bought 2 months prior. I like how this one has nice support for my neck and head as I'm relaxing on my bed with my laptop and phone. The texture of the filling gives it a very nice combination of cushioning and firmness. The horizontal feature line in the center of the pillow is a nice feature for back and neck support thanks to it giving the pillow some flexibility. As for the arms, their length, width, height, and cushioning are very good for resting my arm while I'm using the wireless mouse with my laptop.
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Reviewed in the United States on February 27, 2026
★★★★★ 5
Book Reading Wife Approved
Size: Standard (18-Inch), Color: Sage Green
I purchased this for my wife who reads quite a bit and she absolutely loves it. She said it feels soft, is the right size for her, and makes book reading more comfortable for her. I call it a win.
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Reviewed in the United States on April 23, 2026
★★★★★ 3
Not good quality
Size: Standard (18-Inch), Color: Dark Grey
Comfy, however it’s getting flat an only had it a week
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Reviewed in the United States on April 27, 2026