Grundfos UP15-18B5 circulator pump (Grundfos SKU# 59896114) is a single-speed model with bronze housing and 1/2" sweat inlets. This model is well suited for hot water re circulation as well as other open system types, including radiant, solar, fan coils, storage tanks, etc.
Technical Specifications: - Voltage: 115V
- Amperage: 0.74 Amps
- Hertz: 60 Hz
- Phase: 1
- Watts: 85W
- Max Pressure: 145 psi
- Max Temperature: 230F
- Min Temperature: 36F
- Flow Range: 0-14.7 GPM
- Head Range: 0-13.9 ft
- Horse Power: 1/25HP
- Body: Bronze
- Connections: 1/2" Sweat
2 years from date of installation.
Verified
Purchase
Recirculating pump Haven't installed yet but looks almost exactly like the old one.
Pump Model: 3/4" Sweat
By Ted (from Milan, OH) on
10/09/2022
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Purchase
Re-recirculating Again Nice OEM product, safely packaged and delivered. Decided to manage operation via a smart plug to control daily timing and enable the ability to control remotely.
Pump Model: 3/4" Sweat
By Darren (from Tucson, AZ) on
02/06/2022
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Purchase
Fast shipping and good pricing The pump arrived quickly and pricing was lower than other plumbing shops. Secure checkout.
Pump Model: 1/2" Sweat
By Jennifer (from Austin, TX) on
07/27/2021
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Purchase
Pump Best price for the same product others were quoting for double the price. Great deal and fast shipping. I will buy from them again.
Pump Model: 1/2" Sweat
By Kirk, (from Clio, CA) on
04/14/2021
Verified
Purchase
Great Worked great, previous one smoked after 10 years.
Pump Model: 3/4" Sweat
By Anthony (from Rio rancho, NM) on
07/08/2020
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Purchase
Great price fast service pump was a good price and arrived 2 days soon than expected. Thanks
Pump Model: 1/2" Sweat
By Steve (from Cameron, WV) on
10/12/2020
Verified
Purchase
works as expected was back ordered, but got here eventually
Pump Model: 1/2" Sweat
By Solar Pro (from Boulder, CO) on
07/07/2015
Ask a Question
Three questions: 1. If this pump is installed between a water heater and a fixture, with a return line from the fixture to the water heater, will the fixture be able to draw water with the pump turned off? 2. Will this damage the pump? 3. Are any check valves or air purge devices required for this installation? Thanks!
1. Yes. If pump is installed on a dedicated return line, hot water supply would function as usual even if the pump is turned off.
2. No.
3. Check valve is usually installed on the dedicated return line. Air vent/purge is not needed as long as pump is not installed at the highest point in the system.
By PexUniverse Customer Service on 04/21/2017
where is the check valve located on the grundfos up15-18b5
This model does not have a check valve.
By PexUniverse Customer Service on 02/18/2016
How do I bypass to get hot water when the power is out?
If your system is capable of supplying hot water in the event of a power outage, the hot water supply will function normally even if the power goes out, but without a recirculation feature. The same applies both for systems with and without a dedicated hot water return line. This means that you may have to open the hot water valve on the faucet and wait until the water from the heater reaches it, the old fashioned way.
By PexUniverse Customer Service on 08/31/2015
The direction of flow on the pump - should the flow be toward the fixture or the hot water heater?
For domestic hot water recirculation purposes, it can be either. On the return side (to the water heater), the temperature will always be lower, so it's preferred.
By PexUniverse Customer Service on 10/11/2018
Can this be sweated without disassembly?
Yes. The pump can be sweated without taking it apart.
By PexUniverse Customer Service on 09/15/2020
How do I reset if the pump has stopped working.
If you have the pump controlled by a switching relay (such as Taco SR series) or an aquastat (Honeywell), you would need to reset the power to the relay/aquastat.
By PexUniverse Customer Service on 05/20/2013 
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