Could I use it to pump water out of a large fish tank into the sink?

Yes, as long as it is sitting outside the tank.

Would this be able to pump water from a large rainwater tank in order to irrigate a poly tunnel soaker hose irrigation system?

I use the pump to transfer water from a pond to drain (2m3 per hour). If your hose irrigation system needs less then 2m3 per hour then it should fo the job. If your irrigation system a spray system not sure how far the spray will travel.

Does this require pressure to work? Im intending to use it to pump stationary water from a barrel into another barrel. Thanks

The pump needs to connect to DC 12V power. It can use to pump stationary water

What Power adaptor do I need to connect to this pump?

I used Canadian style cables with a 12 volt terminal connector. To battery

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LONGRUN 12V DC Water Pump, 3L/Min Self Priming Diaphragm Water Pump, 65 Psi High-Pressure for Caravan Camper Boat Shower Lawn Garden

LONGRUN 12V DC Water Pump, 3L/Min Self Priming Diaphragm Water Pump, 65 Psi High-Pressure for Caravan Camper Boat Shower Lawn Garden

Product ID: 452703285

Details

Brand
Longrun
Colour
Black
Material
Plastic
Maximum flow rate
3 Litres Per
Maximum lifting height
2.5 Metres
Number of Packs
1

⚡12V DC power

💧3L/min flow rate

🔧65 PSI max pressure

26784 Ft

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Sold byAmazon HungaryDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💦 Pump up your outdoor lifestyle with LONGRUN’s smart, silent power!

DURABLE COPPER MOTOR - Premium pure copper coil motor for extended life and reliable performance.
SMART PRESSURE CONTROL - Auto on/off pressure switch protects pump and ensures consistent water flow.
EFFORTLESS INSTALLATION - Quick plug design for seamless setup—get running in minutes, no hassle.
WHISPER QUIET OPERATION - Soft rubber mounts minimize vibration noise—peaceful power for your space.
VERSATILE OUTDOOR ESSENTIAL - Perfect for caravans, boats, gardens, and outdoor showers—your all-in-one water solution.

The LONGRUN 12V DC Water Pump delivers a steady 3L/min flow at up to 65 PSI, powered by a durable pure copper motor with intelligent overvoltage protection. Designed for easy installation with a quick plug and equipped with a pressure switch for automatic operation, it’s ideal for caravans, boats, gardens, and outdoor showers. Its low-noise design and robust build make it a reliable, versatile choice for millennial professionals seeking efficient, hassle-free water management on the go.

Specifications

ASIN	B09D7T4FQ6
Best Sellers Rank	41,812 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) 20 in Boat Water Pressure Pumps
Brand	Longrun
Colour	Black
Country of Origin	China
Customer Reviews	4.0 4.0 out of 5 stars (329)
Flow Rate	3 Litres Per Minute
Is Green Purchasing Law Compliant	Yes
Item Dimensions L x W x H	16.2L x 8.5W x 5H centimetres
Manufacturer	LONGRUN
Material	Plastic
Maximum Lifting Height	2.5 Metres
Model Number	3L
Number of Items	1
Number of Packs	1
Power source	Battery Powered
Product Style	Diaphragm
UPC	732122536098
Unit Count	1.0 count
Usage	Home gardening, Boat maintenance, Camping activities, Lawn care
Voltage	12 Volts

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26784 Ft

Duties & taxes included

In stock

Sold byAmazon HungaryDelivered 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 Hungary.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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1 month ago

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