is there a flow chart for differences in head pressure?

the smaller the restriction, the harder the pump will work thus it will overheat. These are not magnetic drives and will not adapt to flow reduction like a brew (aka Riptide) pump. Keep an eye on the heat generated (run in cooler or 5 gal bucket) w/return flow and take water temps over an hour or two. Just restricting the flow will NOT push farther but may make it overheat, use more amps, and then burnout (see user pics of fried extension cords)

What is the pipe thread size of the discharge side of the pump?

It’s actually 0.75 inch thread. I just measured.

Does this have auto shut off?

Auto shutoff for what purpose? Two possibilities would be: A timer would switch it ff and on at prearranged times. For a malfunction due to no water going through, you will ideally want to power it through a ground fault interrupt circuit so in the event the water source accidentally runs dry the pump will not burn out.

Water Pump 500gph | Desertcart Australia

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A$50

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Description

💦 Elevate your aquatic vibe with power, precision, and style!

POWERFUL EFFICIENT - 30W motor delivers robust 550 GPH flow while saving energy—ideal for continuous use without breaking the bank.
PRECISION FLOW CONTROL - Adjust water pressure effortlessly with the built-in control knob for the perfect aquatic environment.
VERSATILE NOZZLE OPTIONS - Three interchangeable nozzles (0.51", 0.62", 0.75") let you customize water flow to suit any aquarium, fountain, or hydroponic setup.
MULTI USE AQUATIC SOLUTION - Perfect for aquariums, ponds, fountains, and hydroponics, enhancing water circulation and aeration to keep your aquatic life thriving.
SECURE FLEXIBLE INSTALLATION - Equipped with 4 strong suction cups and a 5.9ft power cord for easy, stable placement anywhere—vertical or horizontal.

The GROWNEER 550GPH Submersible Pump is a compact, energy-efficient 30W water pump featuring a maximum flow rate of 550 gallons per hour and a lift height of 7.2 feet. It includes three nozzle sizes for customizable water flow, a 5.9-foot power cord, and four suction cups for secure installation. Ideal for aquariums, fountains, ponds, and hydroponic systems, it ensures optimal water circulation and aeration to maintain a vibrant aquatic environment.

Specifications

ASIN	B07MDBYTLS
Best Sellers Rank	#5,462 in Pet Supplies ( See Top 100 in Pet Supplies ) #7 in Aquarium Water Pumps
Brand Name	GROWNEER
Color	Black
Customer Reviews	4.2 4.2 out of 5 stars (11,990)
Flow Rate	33 liters per minute
Horsepower	30 watts
Included Components	1 x 0.51" Nozzle, 1 x 0.62" Nozzle, 1 x 0.75" Nozzle, 1 x 550GPH Water Pump
Item Dimensions L x W x H	3.3"L x 2.2"W x 2.7"H
Item Highlight	2000L/H, with 7.2ft High Lift, 3 Nozzles for Fish Tank, Pond, Hydroponics, Statuary, Pool, Water feature, 5.9ft Power Cord
Item Type Name	Submersible Pump
Item Weight	1.2 pounds
Manufacturer	GROWNEER
Manufacturer Part Number	WP550-3
Material Type	Plastic
Maximum Lifting Height	7.2 feet
Model Number	WP550-3
Number of Items	1
Power Source	ac
Product Style	Submersible
Specific Uses For Product	Aquarium, Fountain, Outside，inside, Pond
UPC	653334368010
Unit Count	1 Count
Voltage	110 volts

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