
905-21 Comparison
| photo | price | summary | rating |
|---|---|---|---|
![]() | $34.99 | Condition is New – Open box, EMERSON White Rodgers 905-21 / 90521 BRAND NEW NOS, shipping cost = $13.00 | 99.9% |

The Rodgers 905-21 Emerson 90521 NOS (New Old Stock) is a high-quality replacement parts set designed for Emerson-brand electric water heaters. This parts set includes a variety of essential components that are commonly worn out or require replacement over time.
The set includes a 905-21 dip tube, which is responsible for directing the incoming cold water to the bottom of the tank, ensuring efficient heating and proper water circulation. This dip tube is made of durable, corrosion-resistant material to ensure long-lasting performance.
Additionally, the 90521 NOS kit includes an Emerson 90521 heating element, which is the heart of the water heater. This heating element is designed to provide consistent and reliable hot water, while also being energy-efficient to help lower utility bills. The element is constructed with high-quality materials and is engineered to meet or exceed industry standards for performance and safety.
The kit also includes a 905-21 thermostat assembly, which plays a crucial role in regulating the temperature of the water heater. The thermostat assembly is designed to ensure that the water temperature remains consistent, while also helping to prolong the life of the heating element. The assembly includes a thermostat, a thermostat housing, and a thermal limit switch, all of which are made of high-quality materials and are engineered to provide precise temperature control.
Finally, the Rodgers 905-21 Emerson 90521 NOS kit includes a 905-21 pressure relief valve. This valve is an essential safety component that helps to prevent the buildup of excessive pressure within the water heater, which could lead to damage or even an explosion. The pressure relief valve is designed to open automatically when the pressure reaches a certain level, and then close once the pressure has been relieved. It is made of durable, corrosion-resistant material to ensure long-lasting performance.
In summary, the Rodgers 905-21 Emerson 90521 NOS kit is a comprehensive set of replacement parts designed for Emerson-brand electric water heaters. The set includes a dip tube, a heating element, a thermostat assembly, and a pressure relief valve, all of which are made of high-quality materials and are engineered to provide reliable and efficient performance. Whether you're performing routine maintenance or repairing a worn-out water heater, this kit has you covered.
The Rodgers 905-21 Emerson 90521 NOS (New Old Stock) relays are well-known for their high-quality and reliability in various industrial and automation applications. Here are some pros and cons to help you make an informed decision about purchasing these relays:
Pros:1. High-quality construction: These relays are built to last with robust mechanical design and high-quality components.
2. Reliability: Emerson relays are known for their reliability and consistency in performance.
3. Versatility: The Rodgers 905-21 relay series offers a wide range of configurations and options to meet various application requirements.
4. Replacement Availability: As NOS relays, they are still available for purchase and offer a cost-effective solution for replacing obsolete or failing relays.
Cons:1. Cost: Compared to newer relay models, the Rodgers 905-21 Emerson 90521 NOS relays may be more expensive due to their vintage status.
2. Compatibility: Ensure that these relays are compatible with your specific application and control system before making a purchase.
3. Limited Support: As older models, there may be limited technical support and resources available for troubleshooting and repair.
In conclusion, the Rodgers 905-21 Emerson 90521 NOS relays offer high-quality construction, reliability, and versatility, making them a valuable asset in various industrial and automation applications. However, their cost, compatibility, and limited support may be considerations when deciding to purchase.
Based on the information provided, if your application requires a reliable and robust relay solution, and you can ensure compatibility and availability of support, the Rodgers 905-21 Emerson 90521 NOS relays could be an excellent investment.
Details:
Brand new in the box, out of inventory a local business that closed, comes as shown.
specifications maxohvac:
- brand: White Rodgers
- mpn: 905-21
payments maxohvac:
- wallet: apple-pay
- other
- credit card: mastercard
returns maxohvac:
- policy: no returns
shipping maxohvac:
- type: fixed
- carrier: usps
- class: expedited
- service: usps priority mail
- transit: 5-8 days
offer maxohvac:
- options: ship-to-home
- started: january 15, 2026
- sold #: 9
- price: $34.99
- item condition: New – Open box
- availability: in stock
seller maxohvac:
- city: medina, ohio
- rating: 99.6%
- # reviews: 2395
general maxohvac:
- category: Business & Industrial > Hvac Refrigeration
Also Viewed:
- 36E01-308: VALVE, White Rodgers
- 3049-18: , White Rodgers
- F50E47-070: CONTROL MODULE, White Rodgers
- 50A65-843: FURNACE CONTROL BOARD BOX, White Rodgers
- EF34CW181: VALVE, White Rodgers
- 3049-71: , White Rodgers
- 3048-25: , White Rodgers
- S84A-82: TRANSFORMER, White Rodgers
- 58K7301: FURNACE VALVE, Lennox
- 3046-5: , White Rodgers
- 36C40-408: , Emerson
