I have pipes with 1/2" od and 3/4" od. what sizes should i buy? i bought 3/4" norminal coupling from another seller, id of coupling is 7/8".

For Copper, OD = Nominal (ID) + 1/8". So 1/2" OD = 3/8" Nominal, and 3/4" OD = 5/8" Nominal. But these are not very common sizes, I would double check your pipe size.

I have pipes with OD 5/8 - nominal is 1/2". Not sure if fittings are name after the pipes it fits (nominal), or is the actual fitting measures?

1/2 “ ID dimension is the actual size (nominal) it is used for plumbing applications

End to end length of 1-inch coupling is 2 inches.

Does the 1/2" copper pipe go on the inside of the coupling or the outside?

Inside the coupler. some, like these, have a stopper inside the coupler that limits how far each pipe penetrates - others dont.

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PROCURU 10-Pack 1/2-Inch Copper Coupling with Stop, C x C Sweat Connection, Certified Safe (CWCR0012-10P)

Product ID: 383067391

Details

Brand
PROCURU
Colour
Copper
Item dimensions L x W x H
30 x 19 x 19
Material
Copper
Size
0.5 Inch

🔥C x C sweat connection for secure soldering

🛠️1/2-inch nominal size, perfect fit

🇺🇸Made in USA, professional-grade quality

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Description

🔧 Connect with Confidence — The Pro’s Choice in Copper Couplings!

PROUDLY AMERICAN MADE - Manufactured in ISO-certified US facilities with local support, ensuring top-tier quality and reliability.
PRECISION FIT EVERY TIME - Engineered to snugly fit 1/2-inch copper pipes for flawless soldering connections.
DURABILITY THAT LASTS DECADES - Crafted from clean, corrosion-resistant copper backed by a 30-year warranty for peace of mind.
CERTIFIED SAFE FOR DRINKING WATER - NSF/ANSI 61 Annex G compliance ensures your plumbing supports potable water without compromise.
VERSATILE FOR RESIDENTIAL COMMERCIAL - Ideal for both home and HVACR applications, making it the go-to choice for pros and DIYers alike.

The PROCURU 10-Pack 1/2-Inch Copper Coupling with Stop offers a professional-grade, durable solution for plumbing and HVACR needs. Featuring a precise C x C sweat connection, NSF/ANSI 61 certified safety for potable water, and backed by a 30-year warranty, these copper fittings are proudly made in the USA to ensure lasting performance and reliability.

Specifications

ASIN	B01M4IKLY7
ASIN	B01M4IKLY7
Best Sellers Rank	#231,314 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #2,396 in Industrial Pipe Fittings
Brand Name	PROCURU
Color	Copper
Connector Type	Coupling
Customer Reviews	4.7 4.7 out of 5 stars (385)
Customer reviews	4.7 4.7 out of 5 stars (385)
Date First Available	11 December 2017
Exterior Finish	Copper
Included Components	1/2" Copper Coupling With Stop, Qty 10
Is Discontinued By Manufacturer	No
Item Dimensions	30 x 19 x 19 millimeters
Item Weight	59 g
Item model number	CW-CRCC-0012-10
Manufacturer	PROCURU
Manufacturer	PROCURU
Manufacturer Part Number	CW-CRCC-0012-10
Material Type	Copper
Model Number	CW-CRCC-0012-10
Number of Pieces	10
Product Dimensions	3.05 x 1.91 x 1.91 cm; 58.97 g
Size	0.5 Inch (1/2")
Thread Size	1/2
Thread Type	NPT
Unit Count	10.0 Count

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฿1663

Duties & taxes included

In stock

Sold byAmazon ThailandDelivered 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 Thailand.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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