We use cookies to provide you with a better experience. By continuing to browse the site you are agreeing to our use of cookies in accordance with our Cookie Policy.

logo
  • Engineers & Specifiers
  • Contractors & Installers
  • Wholesalers & Distributors

Follow Us

Newsletter Signups
Magazine Subscriptions
  • The Wholesaler
  • Plumbing Engineer
  • PHC News
Newsletter Signups
Magazine Subscriptions
  • The Wholesaler
  • Plumbing Engineer
  • PHC News
ASK PHCPPROS AI
  • PRODUCTS
    • Bath & Kitchen
    • Fire Protection
    • HVAC
    • Hydronics/Radiant
    • Plumbing
    • PVF
    • Tools
  • PROJECTS
    • Commercial
    • Green Building
    • MRO/Retrofit
    • Remodeling
    • Residential
  • BUSINESS
    • Buying Groups
    • Technology
    • Associations
  • CODES & STANDARDS
    • ANSI
    • ASHRAE
    • ASSE
    • Regulations
    • Green Building
    • IAPMO
    • ICC
    • NFPA
  • RESOURCES
    • PROS REPS
    • Media Kit
    • Advertise
    • Contact Us
    • Classifieds
    • Digital Editions
    • Testimonials
    • Subscribe
    • Health & Wellness
    • AHR Expo 2025
  • DIGITAL EDITIONS
ASK PHCPPROS AI
Home » U.S. Patent 11,767,988 B1 Issued for Outdoor Circulator with Freeze Protection

U.S. Patent 11,767,988 B1 Issued for Outdoor Circulator with Freeze Protection

October 30, 2023
U.S. Patent 11,767,988 B1 Issued for Outdoor Circulator with Freeze Protection.jpg
U.S. Patent 11,767,988 B1 Issued for Outdoor Circulator with Freeze Protection 1.jpg
U.S. Patent 11,767,988 B1 Issued for Outdoor Circulator with Freeze Protection.jpg
U.S. Patent 11,767,988 B1 Issued for Outdoor Circulator with Freeze Protection 1.jpg

AquaMotion, a U.S. manufacturer and innovation leader in hot water recirculation products, plumbing, and heating circulators, was awarded another Patent (No. 18) for this unique, first outdoor installed recirculation pump.

In the Southern Tier of the US, tankless heaters are installed outside the home. This avoids the need for expensive air intake and exhaust systems and saves money. This pump was designed for use with outdoor installed tankless heaters that do not have a built-in circulator. Five kits are available — two for dedicated return lines, three kits for single pipes, and ON-DEMAND systems. The stainless union and flanged pumps can handle a total pipe length of 250 to 600 feet. The ON-DEMAND kits include ODR by-pass valves and AMK-WB On-Demand controls.

Another application is for outdoor installed wood boilers. Regular pumps do not last because they are not designed for the environment in which they are used.

The unique design protects the pump from wind, cold, heat, and water. The outdoor enclosure is sealed to the pump and is lockable. It houses the wiring and terminals, is vented, has drains, and is insect-protected. The ON/OFF temperatures are higher to compensate for the outdoor temperatures which can adversely affect the proper operation of the pump. 

This pump has built-in freeze protection. If the temperature drops below 40° F, it turns on the pump to protect it from freezing.

The kits are UL and NSF listed, and U.S. built in Rhode Island.

Business Contractors & Installers Engineers & Specifiers HVAC Hydronics/Radiant Industry Community News Plumbing Wholesalers & Distributors
  • Related Articles

    AquaMotion Awarded U.S. Patent for AMK-ODR Hot Water Recirculation Valve

    International Code Council Partners with U.S. Environmental Protection Agency to Address Water Scarcity and Public Safety

    AGF Manufacturing to Sponsor, Present PHCPPros Webinar: "Corrosion and Freeze Protection in Fire Sprinkler Systems"

Most Popular

  • Frank Webb Home Unveils Interactive Showroom in Swanzey, New Hampshire Featuring Luxury Kitchen and Bath Displays

  • Synchrony and Payzer to Offer Seamless Home Improvement Financing Options

  • Oatey Co. Promotes Rohan Adwalpalker to Vice President of Financial Strategy and Risk

  • NFPA Launches "A Code for Every Moment” Campaign to Raise Awareness and Defend U.S. System of Safety Standards Amid Growing Threats

Featured Video

General video

Root 66 Demo with Steve Landis, Gatti Plumbing

Subscribe & Learn More

  • Tw06 2025 cover
    Subscribe
  • Pe06 2025 cover
    Subscribe
  • Phc06 2025 cover
    Subscribe
  • Digital editions
    Learn More

More from PHCP Pros

  • Editorial Team
  • Home
  • Contact Us
  • About
  • Advertise

Follow Us

© 2025 All Rights Reserved

Design, CMS, Hosting & Web Development | ePublishing