State Water Heaters is listed in A. O. Smith’s brand directory, but the complete model determines the specifications and warranty you need to check. A familiar logo or a “50-gallon” description leaves out the fuel, dimensions, delivery rating and coverage conditions.
We reviewed published manufacturer information without installing, testing or ranking the long-term reliability of these heaters. The examples below show how to check a State model; they are not purchase recommendations or approval for a particular installation.
Identify the family before comparing brands
A. O. Smith’s current brand directory (aosmith.com) links State Water Heaters among its brands. State’s own About page (statewaterheaters.com) identifies it as a brand of State Industries, Inc. That relationship does not establish interchangeable parts or identical coverage between related brands.
The State website (statewaterheaters.com) separates gas tank, electric tank, gas tankless and heat-pump products, among other categories. It also uses ProLine, ProLine Master and ProLine XE family names. Record the technology and complete model rather than treating the family name as an installation specification.
State describes ProLine as commercial-grade residential equipment distributed through professional channels. “Commercial-grade” in that description is not, by itself, confirmation of commercial-use warranty coverage. Ask for the certificate applicable to the intended use.
Two 50-gallon labels can describe different fits
State’s March 2025 SRESS00117 specification sheet, page 2 (assets.statewaterheaters.com), lists these standard 240-volt electric examples. The dimensions are the drawing’s A height and C diameter. Confirm the full configuration and clearance requirements with the installer.
On a narrow screen, scroll the table sideways to compare both model columns.
| Specification | EN6 50 DORT, tall | EN6 50 DORS, short |
|---|---|---|
| Nominal capacity | 50 gal | 50 gal |
| Rated storage volume | 46 gal | 46 gal |
| First-hour rating | 62 gal | 57 gal |
| A: height | 59 in. | 49¼ in. |
| C: diameter | 20½ in. | 23 in. |
| Standard element wattage | 4,500 W | 4,500 W |
The short version saves height while using more width. Neither nominal capacity nor the word “short” proves it will fit an existing enclosure. Keep the drawing’s reference points with the measurements; shipping dimensions are separate.
Resolve the first-hour figure before sizing
The current EN6-50-DORT 130 product page (statewaterheaters.com) shows a 62-gallon first-hour selection, description and specification, consistent with the sheet’s tall-model row. Its displayed feature bullet instead says 72 gallons in the first hour.
That is an unresolved mismatch on the maker’s page. Ask State or the supplying contractor to confirm the rating for the exact quoted unit. Do not size a household from the larger feature number simply because it appears prominently, or treat either first-hour figure as stored tank volume.
Keep the manual with the model and serial number
The product page links manual 100309904, July 2018 (assets.statewaterheaters.com). Its cover asks you to retain the receipt and record the model and serial number before calling for assistance. Page 14 ties electrical requirements to the heater’s data plate; a catalog’s optional wattage range is not permission to modify an installed heater.
Page 24 calls for draining, flushing and anode inspection after the first six months, then at least annually or more often depending on water hardness. Match that guidance to the manual supplied with your unit and arrange qualified service where needed. A self-cleaning feature name does not replace the maintenance schedule.
Separate tank and parts terms from the service bill
The EN6-50-DORT page lists six-year limited tank and parts coverage. Its linked 100286377 Rev E warranty, July 2018 (assets.statewaterheaters.com), maps model warranty codes to six-, eight- or ten-year terms and directs readers to the data plate. Confirm the certificate for the actual model and installation.
That certificate restricts coverage to qualifying original purchasers and describes different terms for commercial or multiple-dwelling use. It says a replacement carries the remaining original warranty. Its expense section places labor and related removal, installation and shipping charges on the owner, except where applicable law prohibits this; the document also preserves rights that vary by state.
Request a written service quote separating the tank or part, labor, removal, delivery, permits and other materials. State’s warranty-status page (statewaterheaters.com) accepts a serial or reference number. We did not submit anyone’s details or determine eligibility.
Keep the full model and serial, dated receipt, installation record, applicable manual, warranty certificate and clarified performance figure together. Sources reviewed October 14, 2026. This is a document-checking guide; prices, stock, lifespan, rebate eligibility and installation design are not assessed.