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Atwood Mobile 91604 Water Heater Pressure Temperature Relief Valve 1/2" NPT 150 PSI

Manufacturer

Atwood Mobile

<h3>Leading Manufacturer of RV Appliances and Components</h3> <p>Atwood Mobile Products was founded in 1909 by James and Seth Atwood, originally starting as a vacuum machine company. Over the course of more than a century, the company transformed itself into one of the recreational vehicle industry's most trusted names. According to industry reports, Atwood products are found in 90 percent of recreational vehicles in America, a testament to the brand's widespread acceptance and reliability among RV manufacturers and owners alike.</p> <p>Throughout its history, Atwood has strategically expanded its product portfolio through key acquisitions. The company acquired the Bowen Company in 1964, Wedgewood in the mid-1980s, Hydroflame furnaces in 1993, and Fan-Tastic Vent in 2010, growing its manufacturing capabilities to include a comprehensive range of RV appliances and components. This growth strategy positioned Atwood as a full-service supplier capable of meeting diverse needs across the mobile living sector.</p> <h3>Water Heaters and Heating Solutions</h3> <p>Atwood's most recognized product line remains its <a href="/6692-atwood-mobile-water-heaters-201162">water heaters</a>, where the company has earned its reputation as a pioneer in compact, efficient heating solutions. Atwood Mobile Products has been a world leading manufacturer of appliances and hardware for the RV industry for over 30 years, with particular expertise in water heating technology. Atwood water heaters weigh less than their competitors, 14 pounds less to be exact, making them ideal for mobile applications where every pound matters. The company's innovative approach includes features like Direct Spark Ignition systems and heat exchanger technology that maximize efficiency while minimizing space requirements.</p> <h3>Beyond Water Heaters: Diverse Product Range</h3> <p>While Atwood is best known for heating appliances, the company manufactures a broader range of components that keep vehicles running smoothly. Their product lineup includes <a href="/6692-atwood-mobile-engine-water-pump-2208">engine water pumps</a> designed for reliable coolant circulation, <a href="/6692-atwood-mobile-headlight-bulb-11701">headlight bulbs</a> for visibility and safety, and <a href="/6692-atwood-mobile-hvac-heater-control-valve-6860">HVAC heater control valves</a> that regulate cabin temperature. The company even produces <a href="/6692-atwood-mobile-shock-absorber-kit-48166">shock absorber kits</a> for improved ride quality, demonstrating Atwood's commitment to addressing multiple aspects of vehicle performance and comfort.</p> <h3>Engineering Excellence and Industry Leadership</h3> <p>Definitive design and exceptional engineering help to separate Atwood from other manufacturers. The company's approach focuses on creating products that can withstand the unique challenges of mobile environments—constant vibration, temperature fluctuations, and the need for compact installation profiles. Atwood is the largest manufacturer of specialized water heaters for recreation vehicles and marine use worldwide, with 30 years of experience building lightweight, reliable products for difficult mobile conditions. This expertise extends across their entire product range, ensuring that whether you're replacing a water heater component or sourcing an engine part, you're getting products engineered specifically for the demands of mobile applications.</p> <p>Today, Atwood continues to innovate and expand its offerings while maintaining the quality standards that have made it an industry leader. For RV owners, marine enthusiasts, and anyone maintaining mobile equipment, Atwood Mobile Products represents more than a century of manufacturing expertise dedicated to making life on the road more comfortable and reliable.</p>

Part Number

91604
07/11/2036 4:49 AM
Sale Price

$34.84

In Stock (10+)

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Usually delivered within 2 days

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Fitment guaranteed

Fitment guaranteed

Product Details

The Atwood Mobile 91604 is a replacement pressure-temperature (P&T) relief valve for Atwood RV water heaters. Rated at 150 PSI, this safety valve is designed to automatically open and relieve excess pressure or temperature buildup inside the water heater tank, protecting the system from potentially dangerous over-pressure conditions.

This 1/2" NPT valve features a 4" long thermostat probe for installation in the hot water outlet line and includes a manual test lever for routine safety testing. It uses a 1/2" male inlet x 1/2" female outlet configuration with standard pipe thread.

Important Fitment Note: This 1/2" valve applies to Atwood water heater models manufactured before February 2006 and can be identified by its orange thread protector. Units made after February 2006 require the 3/4" valve (Atwood part #90028), identifiable by a red thread protector.

Key Features:

  • 150 PSI pressure relief rating
  • 1/2" NPT pipe thread connection
  • 4" long thermostat probe for hot outlet line installation
  • 1/2" male inlet x 1/2" female outlet
  • Includes manual test lever for safety verification
  • For use with Atwood water heaters manufactured before February 2006 (orange thread protector)
  • Direct OEM replacement — Atwood part number 91604

Compatible with a wide range of Atwood electronic and pilot model water heaters including GCH6, GC6A, GC6AA, GH6, G6A, GCH10A, GC10A, G10, GH10, XT Series, and many more models with a 1/2" threaded port.

Ordered a battery. Price was good, paid for upgraded shipping, which was a waste. Battery arrived ok, but packaging was not dense and secure, especially given that this was a very heavy item.

Good website, good prices. Could use a little better info regarding order fulfillment.

It fits!!

Really like my new front lock for loading my boat. Works great.

Thanks

Still in the process

Ordered 4 winter tires, which were affordable and in brand new condition. Shipping was fast. 5 star service.

Good product and price

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