Are these rebuilt?........ Why are they all gold as if they were painted?

Most domestic water pumps are painted gold. Most heating water pumps are painted red. Grundfoss makes both. This is a new pump and it works well. I am a licensed master plumber and I installed this pump at my brothers home. Ken

Hi, anyone know the gpm of the grundfos up-15-18 at about 50 psi?

You need to know the feet of head the pump will be working against to determine gpm. The feet of head is found by adding the loss in piping, fittings, valves, water coils and any other items that cause friction loss. The pressure on the system won't tell you anything about the flow rate. The pump curve for this pump shows a flow rate of 15 gpm at 0 ft of head and 0 gpm @ 15 ft of head. You need to know the Ft of head to determine the actual flow rate your installation will deliver.

Is it possible to lower the speed on this? It is causing pinhole leaks in my copper pipes. I don't think it needs to run as fast as it does.

No. You have a grounding problem. Ground your pipes. Also your copper pipes are probably too thin. There are thicker pipes available. Spend the money for quality. And thinking about it running slower is ludicrous. It runs fine just the way it is. It will also last forever. These pumps are the Very Best There Is. Z

why was this item removed from service how long was it used

The old pump was overheating and making an unusual sound. (Kind of a soft gringing noise) It had been in service approimately 10 years.

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⚡ Pump up your heating game with whisper-quiet, durable power!

COMPACT POWERFUL - Space-saving 12" cube design fits seamlessly into any system without compromise
SILENT PERFORMANCE - Whisper-quiet operation ensures peaceful environments—perfect for sound-sensitive spaces
EFFORTLESS EFFICIENCY - 1/25 HP motor delivers reliable circulation with minimal energy use
VERSATILE COMPATIBILITY - Multiple accessories support diverse hydronic and fan coil heating applications
DURABILITY YOU CAN TRUST - Robust bronze construction paired with built-in motor protection for extended pump life

The Grundfos UP15-18B5 is a compact, bronze circulator pump featuring a 1/25 HP motor and 115V power source. Designed for hydronic and fan coil heating systems, it offers whisper-quiet operation and built-in motor protection for long-lasting, reliable performance. Its versatile accessories and durable build make it an essential upgrade for efficient, silent heating solutions.

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Brand	Grundfos
Color	Red
Material	Bronze
Style	Circulator Pump
Product Dimensions	12"L x 12"W x 12"H
Power Source	Ac/dc
Item Weight	5.17 Pounds
Voltage	115 Volts
Manufacturer	Grundfos
UPC	795092563082
Part Number	59896114
Item Weight	5.17 pounds
Item model number	59896114
Is Discontinued By Manufacturer	No
Size	12" x 12" x 12"
Item Package Quantity	1
Included Components	GF 59896114
Batteries Included?	No
Batteries Required?	No

Grundfos UP15-18B5 (59896114) Pump, 1/2" Sweat End Open System Circulator, 1/25 HP 115V - Bronze

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