Does the 12v 4.5-7psi pump have a check valve so fuel can only flow in one direction?

Yes, this fuel pump has only one check valve and fuel can only flow in one direction.

Anyone find the male end for the electric connection? What do you search

There should be a mating plug on the 02A car. If there is no mating plug, you can cut off the plug and connect red to positive and black to negative.

Can i use the 2.5-4.5 psi model to add an external fuel tank to a gravity fed 3400w generator? will it flood the carburetor?

This pump output pressure is 4.5-7psi,so you can't use this model.But you can buy another pump that is E8016S in our shop, which can add an external fuel tank to a gravity fed 3400w generator.

Hep 02a | Desertcart SINGAPORE

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Description

⚡ Fuel your ride with power and precision — don’t get left behind!

TRUSTED OE REPLACEMENT - Fits multiple OEM part numbers for hassle-free upgrades and guaranteed fit.
HIGH FLOW RATE EFFICIENCY - Pumps up to 100 liters per hour ensuring smooth fuel delivery under all loads.
ROBUST METAL CONSTRUCTION - Durable solid metal body built to withstand tough conditions and long-term use.
UNIVERSAL 12 V COMPATIBILITY - Seamlessly powers cars, trucks, boats & more with a single pump.
PRECISION LOW PRESSURE OUTPUT - Delivers a steady 5-9 PSI for optimal fuel efficiency and engine performance.

The AdvanEX Electric Fuel Pump HEP-02A is a universal 12V inline fuel pump designed for low pressure applications (5-9 PSI) compatible with gas and diesel engines. Featuring a robust metal body, it delivers a reliable flow rate of 100 L/H and fits a wide range of vehicles including cars, trucks, boats, and lawnmowers. This pump replaces multiple OEM parts, ensuring easy installation and dependable performance backed by a one-year warranty.

Specifications

ASIN	B092S651ZL
Auto Part Position	Inside
Automotive Fit Type	Universal Fit
Best Sellers Rank	#21,295 in Automotive ( See Top 100 in Automotive ) #58 in Automotive Replacement Electric Fuel Pumps
Body Material	Metal
Brand Name	AdvanEX
Compatible with Vehicle Type	Car, Truck
Connector Type	NPT
Customer Reviews	4.2 4.2 out of 5 stars (486)
Fit Type	Universal Fit
Gas Type	diesel,gas
Inlet Connection Size	8 millimeters
Inlet Connection Type	Hose Barb
Item Weight	0.4 kg
Manufacturer	HXPARTS
Manufacturer Part Number	HX-18021
Material Type	Metal
Mounting Type	Bung Mount
Number of Items	1
OEM Equivalent Part Number	1004-30334, 2P74019 5656980, 6414671 6472381 152-0584 69404, 6414671 EP12S FD0002 P60430 HEP-02A DW588
Operation Mode	Electric
Part Interchange Info	1004-30334, 2P74019 5656980, 6414671 6472381 152-0584 69404, 6414671 EP12S FD0002 P60430 HEP-02A DW588
Product Grade	Performance Part
Product Style	Electric
Specification Met	OE
UPC	783097004211
Unit Count	1 Count

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