Any reason this unit wouldnt be compatible with a Navien tankless propane water heater in my garage ?

This pump probably will not work with navien tankless. The navien needs to have a .5 gallon per minute to turn heater on, the flow rate will probably be too low. Check your model, navien does make a tankless that has recirculating pump installed. They also have their own thermonic tees that you can install if you don’t have a hot water recirculating line.

how to get operating instructions

Operating instructions come with the Grundfo's 595916.

Does this have a button that can be pressed to turn the pump on and cycle the water?

There is a switch as a part of the timeclock that can turn the pump to On. Auto, or Off. Then look at the perimeter of the timeclock at the little switches, I think there are four per hour. If you push them toward the center the pump will not run at that time; the pump will run during the times when the switches are in the position farther away from the center.

Plumber said we needed additional parts under kitchen sink and bathroom. Correct?

Additional hoses to couple the bypass device at the farthest sink connection. Of course the pump is located at the hot water heater.

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595916 1/25 Horsepower Comfort Series Recirculator Pump, Model: 595916, Outdoor & Hardware Store

Product ID: 165061759

Details

Brand
Grundfos
Color
Red
Item Weight
4 pounds
Material
Aluminum Steel
Maximum Flow Rate
9 gpm
Maximum Lifting Height
6 feet

⚡25W low power draw

💧9 GPM max flow rate

🔧Maintenance-free design

2575.24 DT

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Description

🔥 Never wait for hot water again — save time, energy, and water with Grundfos! 💧

EASY DIY INSTALLATION - Plug-and-play setup with included timer and 10-foot power cord—no extra wiring needed.
SMART TIMER INTEGRATION - Pre-program usage times to optimize energy savings without lifting a finger.
WHISPER QUIET OPERATION - Enjoy comfort without noise disruption, perfect for modern homes and offices.
EFFORTLESS HOT WATER ON DEMAND - Instant hot water recirculation eliminates wait times and water waste.
DURABLE STAINLESS STEEL BRONZE BUILD - Corrosion-resistant materials ensure long-lasting, reliable performance.

The Grundfos 595916 Comfort Series Recirculator Pump is a compact, energy-efficient 1/25 HP pump designed for instant hot water recirculation in residential settings. Featuring a durable stainless steel and bronze construction, a quiet 25-watt motor, and a smart timer with a 10-foot power cord, it delivers up to 9 gallons per minute flow and lifts water up to 6 feet. Maintenance-free and easy to install, it reduces water waste and energy costs while enhancing home comfort.

Specifications

ASIN	B07LGQZRFV
Best Sellers Rank	#349,898 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #400 in Power Water Pumps
Brand Name	Grundfos
Color	Red
Customer Reviews	4.6 4.6 out of 5 stars (209)
Flow Rate	9 gpm
Horsepower	0.17 hp
Item Dimensions L x W x H	4.69"L x 3.31"W x 5.19"H
Item Weight	4 pounds
Manufacturer	Grundfos
Manufacturer Part Number	HRD-PN-79043906
Material Type	Aluminum, Stainless Steel
Maximum Lifting Height	6 feet
Model Number	595916
Number of Items	1
Power Source	Battery Powered
Product Style	Above Ground
UPC	783961197742
Voltage	115 volts

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2575.24 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Tunisia.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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