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

Product ID: 174609493

Details

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

💪250 PSI heavy-duty brass

🔒Lock-on clip for secure fit

⚙️¼" female NPT thread compatibility

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Description

🔧 Inflate Like a Pro, Lock It Down Like a Boss!

TRUSTED BY PROS LOVED BY DI YERS - AstroAI’s precision engineering and rugged build make it the go-to choice for tire maintenance enthusiasts and professionals alike.
BUILT TO LAST WITH 250 PSI BRASS POWER - Heavy-duty brass components engineered for professional-grade durability and high-pressure performance.
UNIVERSAL FIT WITH FEMALE NPT THREADS - Seamlessly integrates with most inflators and compressors for versatile, on-the-go tire care.
STRAIGHT TIP DESIGN FOR EFFORTLESS AIRFLOW - Streamlined tip guarantees smooth, quick inflation without fumbling or valve damage.
SECURE LOCK ON CLIP FOR HASSLE FREE INFLATION - Locking clip ensures a firm, no-slip connection to Schrader valves, eliminating air leaks and interruptions.

The AstroAI Air Chuck is a heavy-duty, brass-constructed tire inflator accessory rated for up to 250 PSI. Designed with a secure lock-on clip and compatible with Schrader valves, it features a straight tip and ¼" female NPT threads to fit most inflators. Perfect for professionals and enthusiasts seeking reliable, hassle-free tire inflation.

Specifications

ASIN	B078WVQL31
Best Sellers Rank	#212,600 in Car & Motorbike ( See Top 100 in Car & Motorbike ) #1,446 in Tyre Inflators
Brand Name	AstroAI
Capacity	0.25 Inches
Compatible Devices	Tire Inflator, Tire Gauge
Customer Reviews	4.5 4.5 out of 5 stars (4,983)
Global Trade Identification Number	00767452943575
Handle Type	hand-tightened
Included Components	1
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
Material Type	Brass
Model Number	767452943575
Number of Items	2
Number of Packs	1
Thread Size	¼-18 NPT
UPC	767452943575

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₨911

Duties & taxes included

In stock

Sold byAmazon SeychellesDelivered 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 Seychelles.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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