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

🔧250 PSI rated brass for durability

🔩¼" female NPT threads fit most inflators

🛠️Heavy duty lock-on clip for secure inflation

$32.26

Duties & taxes included

In stock

Sold byAmazon EcuadorDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚗 Inflate Like a Pro, Lock It Down with AstroAI!

LOCK ON CLIP FOR HANDS FREE INFLATION - Securely attaches to valve stems, freeing your hands and speeding up tire maintenance.
UNIVERSAL FIT WITH FEMALE NPT THREADS - Seamlessly compatible with most tire inflators and gauges for effortless integration.
BRIGHT YELLOW FINISH FOR INSTANT VISIBILITY - Stand out in your toolkit and never lose track of your essential inflator accessory.
BUILT TO LAST WITH 250 PSI BRASS COMPONENTS - Engineered for heavy-duty use, ensuring long-lasting performance under pressure.
CLOSED FLOW DESIGN FOR EFFICIENT AIR DELIVERY - Optimizes airflow only when needed, reducing air loss and improving inflation speed.

The AstroAI 2 Pack Air Chuck features heavy-duty 250 PSI rated brass components and a closed flow lock-on design with a secure clip, compatible with Schrader valves and most inflators via ¼" female NPT threads. Designed for durability and efficiency, this bright yellow set ensures hassle-free, hands-free tire inflation with a 1-year warranty backing its quality.

Specifications

ASIN	B078WVQL31
Best Sellers Rank	#14,876 in Automotive ( See Top 100 in Automotive ) #31 in Tire Chucks
Brand	AstroAI
Brand Name	AstroAI
Capacity	0.25 inches
Compatible Devices	Tire Inflator
Customer Reviews	4.5 out of 5 stars 5,782 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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