What is the difference, open flow and closed flow?

Lot's of info here that may confuse most. Open flow for hand held tire inflators or small 12v pumps. Allows the air to flow both directions, aka if your inflator has a pressure gauge and manual valve to let the air out of the hose. Closed flow is for direct connect to a compressor where you want the air to stop when you disconnect it, as in a shop or gas station. Both open the valve step to allow the air to flow.

will this work on presta valves?

no from what i read you would need an adepter

Im filling air tanks. Will i have to hold lever down or will it lock in open position?

If you are filling via a Schrader valve you will have to lock it on the valve otherwise it will not fit on the valve. Once on the valve you do not have to hold it down.. It least that has been my experience. I have been pleased with how these work. I bought mine to use on a Jaco inflator tool after the Jaco chuck failed. Not sure how it would hold up under commercial use. I use mine around the shop maintaining lawn equipment and personal vehicle tires for the last year

I am making a harness to deflate/inflate all 4 tires simultaneously. When I connect the first one to a valve stem, are the other 3 closed, or leak?

They should only flow (to deflate/inflate) when they are engaged to a valve. If you scroll down on the photos, they actually have one that describes open vs closed. My first purchase I didn't pay enough attention and order "open" ones and they leaked thru. Then I ordered the closed ones and they have worked great since.

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AstroAI 2 Pack Air Chuck, Heavy Duty Closed Flow Lock On Tire Chuck with Clip for Inflator Gauge Compressor Accessories, Yellow

AstroAI 2 Pack Air Chuck, Heavy Duty Closed Flow Lock On Tire Chuck with Clip for Inflator Gauge Compressor Accessories, Yellow

Product ID: 57651074

Details

Brand
AstroAI
Compatible Devices
Tire Inflator
Item Diameter
0.25 Inches
Material
Brass
Thread Size
¼-18 NPT

🔧¼" female NPT thread fits most inflators

🔩250 PSI rated brass build

🛠️Heavy duty lock-on clip for secure inflation

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Description

🚗 Lock in precision, inflate with confidence!

VALUE PACKED DUO - Two high-quality air chucks in one set, perfect for professionals and DIYers who demand reliability.
SECURE LOCK ON CLIP - Manual locking clip keeps the chuck firmly attached to the valve stem, preventing air leaks and interruptions.
EFFORTLESS INFLATION - Heavy-duty straight tip and closed flow design make tire filling quick and hassle-free.
UNMATCHED DURABILITY - Premium brass components rated for 250 PSI ensure long-lasting, heavy-duty performance.
UNIVERSAL COMPATIBILITY - Designed with ¼" female NPT threads to seamlessly fit most tire inflators and gauges.

The AstroAI 2 Pack Air Chuck features robust brass construction rated for 250 PSI, compatible with Schrader valves and most inflators via ¼" female NPT threads. Its heavy-duty straight tip and secure lock-on clip ensure efficient, leak-free tire inflation. Ideal for automotive pros and enthusiasts, this set delivers reliable performance backed by a 1-year warranty.

Specifications

ASIN	B078WVQL31
Best Sellers Rank	#14,019 in Automotive ( See Top 100 in Automotive ) #28 in Tire Chucks
Brand	AstroAI
Brand Name	AstroAI
Capacity	0.25 inches
Compatible Devices	Tire Inflator
Customer Reviews	4.5 out of 5 stars 5,781 Reviews
Global Trade Identification Number	00767452943575
Handle Type	hand-tightened
Included Components	2 tire chucks
Item Diameter	0.25 inches
Item Type Name	AstroAI Air Chuck, Heavy Duty Closed Flow Lock On Tire Chuck with Clip for Inflator Gauge Compressor Accessories, Yellow
Lock Type	Manual
Manufacturer	AstroAI
Manufacturer Part Number	767452943575
Manufacturer Warranty Description	1 Year Warranty
Material	Brass
Material Type	Brass
Model Number	767452943575
Number of Items	2
Thread Size	¼-18 NPT
UPC	767452943575

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B/.39

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In stock

Sold byAmazon PanamaDelivered 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 Panama.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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