I have to join tubing that is 5/16 id, 9/16 od that will carry co2 gas from a tank to a keg coupler. what size would be best?

Mostly depends on how soft the hose is and the pressure. Soft 5/16 hose will easily push onto a 3/8 barb.

Will this work with 3/4 polybutylene irrigation line?

No. These have an external dimension of 3/8. Measure the internal diameter of your tube and select a connector with that measurement.

Is this toxic? I want to use it for my fridge water

It's not toxic, has the NSF/ANSI 61 standard. Safe for potable water.

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Tefen - 12256208003 Nylon 66 Hose Fitting, Coupling, Gray, 1/2" Hose ID (Pack of 10)

Tefen - 12256208003 Nylon 66 Hose Fitting, Coupling, Gray, 1/2" Hose ID (Pack of 10)

Product ID: 28264949

Details

Brand
Tefen
Color
Gray
Connector Type
Hose Id
Exterior Finish
Brass
Item Weight
13.61 g
Item dimensions L x W x H
4 x 3.1 x 1.1

⚙️200 psi max pressure

🌡️-5 to +230°F temp range

🛡️Nylon 6/6 corrosion resistant

6142 kr

Duties & taxes included

In stock

Sold byAmazon IcelandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔗 Connect with confidence — the coupling that keeps your flow flawless!

UNMATCHED DURABILITY - Crafted from tough Nylon 6/6 for lightweight strength and chemical resistance
EFFORTLESS CONNECTIVITY - Barbed dual-end design ensures a secure, leak-proof hose connection every time
CERTIFIED SAFETY ASSURANCE - Meets NSF/ANSI 61 standards for safe drinking water system use
PRESSURE READY PERFORMANCE - Handles up to 200 psi ensuring reliable operation under demanding conditions
WIDE TEMPERATURE TOLERANCE - Operates flawlessly from -5°F to 230°F, perfect for any environment

The Tefen 12256208003 Nylon 6/6 hose coupling is a pack of 10 gray connectors designed for 1/2" hose ID. Engineered for industrial and domestic use, it offers corrosion resistance, a max operating pressure of 200 psi, and a broad temperature range (-5 to 230°F). Certified to NSF/ANSI 61, it guarantees safe use in drinking water systems while providing a secure barbed connection for plastic, rubber, or PVC hoses.

Specifications

ASIN	B006OGAIAG
Best Sellers Rank	#523,290 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1,909 in Barbed Hose Fittings
Brand Name	Tefen
Color	Gray
Connector Type	Hose Id
Customer Reviews	4.6 4.6 out of 5 stars (326)
Exterior Finish	Brass
Item Dimensions	4 x 3.1 x 1.1 inches
Item Weight	13.61 g
Manufacturer	Seelye Acquisitions
Manufacturer Part Number	12256208003
Material Type	Nylon
Model Number	12256208003
Number of Pieces	10
Size	0.5 Inch
Thread Type	NPT
Unit Count	10 Count

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TrustScore 4.5 | 7,300+ reviews

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The product exactly matches the description. Very satisfied with my purchase.

5 days ago

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