Grundfos UP15-10B5 (Grundfos SKU# 59896213) is a 1/25HP bronze circulator pump with 1/2" Sweat inlet/outlet connections and is typically used in open loop heating and hot water recirculation applications, such as radiant, solar, storage tanks, as well as chilled water cooling and many others. Bronze housing of the UP15-10B5 model protects the pump from corrosion and sweat connections allow for easier and faster installation and eliminate the need to purchase and install pump flanges.
Features: - Ceramic shaft and radial bearings
- Carbon axial bearing
- Stainless steel rotor can and bearing plate
- Corrosion-resistant impeller, Composite, PES
- Bronze pump housing
- Speed Number: 1
- Max flow: 8.37 US gpm
- Head max: 6.23 ft
- Liquid temperature range: 35.6 - 219.2 F
- Maximum operating pressure: 145 psi
- Approvals on nameplate: UL, CSA
- Pump housing: Bronze
- Pump housing: DIN W.-Nr. 2.1176.01
- Impeller: Composite, PES
- Maximum ambient temperature: 104 F
- Ambient max at 176 F liquid: 176 F
- Maximum operating pressure: 145 psi
- Flange standard: USA Sweat
- Type of connection: Bronze Sweat
- Pipe connection: 1/2" Sweat
- Pressure stage: 10
- Port-to-port length: 5"
- Number of poles: 2
- Max. power input: 25 W
- Rated power - P2: 0.04 HP
- Main frequency: 60 Hz
- Voltage: 115V
- Current in speed 3: 0.22 A
- Capacitor size - run: 2mF/400 V
- Insulation class (IEC 85): F
- Gross weight: 6 lbs
2 years from date of installation.
Exact Replacement "My Home is 11 years old, just purchased 1 year ago,discovered my Grundfos Boiler Bypass Pump was seized. Ordered replacement from PEX works great.
Was able to leave original sweat connections in tact with old housing. Loosen four bolts 4mm on pump housing and thats it!"
Pump Model: 1/2" Sweat
By Tonester (from Macomb, Michigan) on
11/27/2011
Verified
Purchase
Quality pump at affordable price Grundfos makes the very best recirc pumps and PEX sells them at a deccent price with free shipping!
Pump Model: 1/2" Sweat
By Richard (from Las vegas, NV) on
02/23/2025
Verified
Purchase
First time buyer Good product and good price. Process is smooth and delivery is fast.
Pump Model: 1/2" Sweat
By Peter (from Vista, CA) on
06/01/2024
Verified
Purchase
Service Tech Very good products
Pump Model: 1/2" Sweat
By Tinh (from Ladera ranch, CA) on
01/21/2024
Verified
Purchase
Pump We had to replace a failed pump that froze. The first replacement pump had a leak in the metal. The the replacement pump was installed with good service
Pump Model: 3/4" Sweat
By Dwain (from Maryville, TN) on
02/25/2023
Verified
Purchase
Thank you Great customer service, fast shipping, thank you!
Pump Model: 1/2" Sweat
By Safar D (from Colleyville, TX) on
01/16/2022
Verified
Purchase
Circulator Fast shipping! Great people to work with
Pump Model: 1/2" Sweat
By Chris (from Stewartsville, NJ) on
11/27/2020
Verified
Purchase
fast shipping installed and running at a great price
Pump Model: 3/4" Sweat
By Wally (from Omaha, NE) on
02/04/2019
Verified
Purchase
Pex Universe review Great to deal with, as expected, on time and perfect.
Pump Model: 1/2" Sweat
By Jim (from International falls, MN) on
10/26/2018
Verified
Purchase
Excellent circulatior for tank type water heater Bought this pump 3 months ago, set it with ~30 feet 3/4" pex return. works as charm. Really quiet
Pump Model: 3/4" Sweat
By Mitch, Plumber (from Los Angeles,CA) on
08/17/2016
Ask a Question
Is this the best Grundfos Pump for a dedicated Hot Water Recir. Line?
Grundfos makes a lot of pumps suitable for hot water recirculation. The "best" one is the one which has operating parameters (flow rate and head) that match your system's requirements.
UP15-18B5 is a popular model for hot water recirculation applications, but you may also want to check out the Comfort Series circulators - these are specifically designed for hot water recirculation and depending on the model, may come with timer and/or aquastat.
By PexUniverse Customer Service on 07/30/2012 
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