Does it turn itself off when the water from the return line is hot?

In Auto mode, the unit will run only when it 'believes' you will need hot water based on your usage over the last two weeks, so most of the time the pump is not running. In 100% mode, the pump runs at all times. In temperature mode the pump will turn off when the water in the re circulation line is still hot, then turn on to circulate hot water as the return line cools.

Is this a replacement for the discontinued #96433902?

The unit that I replaced was #97525922 UP10-16 BU/ATLC.. The contection flanges matched, which made the swap easy. I didn't have to change any plumbing.

What is the dimension between the two pipe connections? the cut sheet for up 10-16 a pm bu/lc shows 4.33 inches. the photo here looks much longer.

I'm unsure as to what picture you're looking at. Recently had a new water heater installed. The configuration of pipes are 2 in 10" increments to the downspout of the water heater with one about 4" to the pump. Hope that helps. Whoever installs it would know what you need.

Can you use this pump without a dedicated return line if the Grundfos under-sink valves are purchased separately?

PUMP DESIGNED TO DISCHARGE INTO DRAIN VALVE OF Water heater. RETURN LINE MUST BE RUN FROM FURTHERIST HOT WATER LINE IN THE HOME TO PUMP INTAKE. THIS PROVIDES HOT WATER LOOP FOR ALL FIXTURES

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Grundfos 98420224 UP 10-16 A PM BU/LC Comfort PM AutoAdapt Recirculation Pump

Product ID: 122012423

Details

Brand
Variety Home
Color
Black
Item Weight
0.27 g
Manufacturer
Grundfos
Material
Brass
Maximum Flow Rate
2.2 gpm

⚡96% motor energy saved

🔥48% heat energy saved

🛠️Plug & play ALPHA installation

2831.71 DT

Duties & taxes included

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Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

♻️ Upgrade to smarter, greener water flow—because your home deserves the best!

LEGIONELLA DEFENSE - Built-in automatic legionella elimination keeps your water safe and healthy without extra effort.
SMART ENERGY SAVER - AUTOADAPT cuts heat & motor energy use by up to 96%, slashing your utility bills.
EFFORTLESS INSTALLATION - Highly reliable ALPHA plug ensures quick, hassle-free electrical setup—no electrician needed.
UNIVERSAL COMPATIBILITY - Easy-to-separate pump head fits most competitor housings for seamless upgrades or replacements.
WEEKEND VACATION MODE - Automatically detects downtime to optimize pump operation and save energy when you’re away.

The Grundfos UP 10-16 A PM BU/LC Comfort PM AutoAdapt Recirculation Pump revolutionizes residential hot water circulation with its unique AUTOADAPT technology, saving up to 48% heat energy and 96% motor energy. Featuring automatic weekend/vacation detection and legionella elimination, it ensures efficient, safe water flow. Its plug-and-play ALPHA installation and universal pump head compatibility make upgrades and maintenance effortless.

Specifications

ASIN	B07PY95VSH
Best Sellers Rank	#122,757 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #104 in Power Water Pumps
Brand Name	Variety Home Supply
Color	Black
Customer Reviews	4.4 4.4 out of 5 stars (138)
Flow Rate	2.2 gpm
Included Components	COMFORT PM AUTO 115V 1-1/4 PUM
Item Dimensions L x W x H	7.5"L x 4"W x 6.2"H
Item Type Name	Recirculation Pump
Item Weight	0.27 g
Manufacturer	Grundfos
Manufacturer Part Number	UP 10-16
Material Type	Brass
Model Number	UP 10-16
Power Source	Corded Electric
Product Style	Above Ground
Specific Uses For Product	Residential hot water circulation
UPC	850007341015
Unit Count	1 Count
Voltage	115 volts

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