What are the ID of the 2 x 1 1/4 rubber coupling?

1 and 1/4 x 2 are the size if inner diameters

Is it possible to use for car exhaust

I wouldn't. Exhaust pipes get hot and this isn't heat resistant.

I want to know this answer as well. It doesn't say in the specs what temperature is allowed, neither transient nor continuous. From Wikipedia: The heat stability of raw PVC is very poor, so the addition of a heat stabilizer during the process is necessary in order to ensure the product's properties. Traditional product PVC has a maximum operating temperature around 60 °C (140 °F) when heat distortion begins to occur.[25] Melting temperatures range from 100 °C (212 °F) to 260 °C (500 °F) depending upon manufacture additives to the PVC. The linear expansion coefficient of rigid PVC is small and has good flame retardancy, the limiting oxygen index (LOI) being up to 45 or more. The LOI is the minimum concentration of oxygen, expressed as a percentage, that will support combustion of a polymer and noting that air has 20% content of oxygen.

2” to 1 1/4” adapter Is bigger inside opening than stated. Can a 1 1/4” p trap seal correctly?

I used to connect 2” to 1 1/2”. Both pipe were schedule 40. A P trap is normally a lighter schedule. You may need and adapter from 1 1/4” P trap to 1 1/4” schedule 40.

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EVERCONNECT - 4830

Product ID: 67056915

Details

Brand
SUPPLYGIANT
Color
Black
Connector Type
Flange
Exterior Finish
Brass
Item dimensions L x W x H
2 x 2 x 3
Material
Polyvinyl

🌍ASTM C1173 & UPC certified for underground use

🔧2.4" x 1.6" inner diameter precision fit

🛡️Stainless steel clamps for corrosion resistance

£12.95

Duties & taxes included

In stock

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Description

🔗 Connect with confidence — the flexible coupling that never quits!

UNIVERSAL COMPATIBILITY - Seamlessly connects cast iron, copper, plastic & steel pipes
DURABLE PVC CONSTRUCTION - Resistant to chemicals, UV rays, fungus & sewer gases for tough environments
CERTIFIED CODE COMPLIANT - Meets ASTM C1173, CSA B602, and UPC standards for peace of mind
LEAK PROOF ROT PROOF SEAL - Engineered to prevent infiltration and exfiltration, ensuring lasting reliability
EASY INSTALLATION VERSATILITY - Perfect for drain, waste, vent, and sewer systems indoors or outdoors

The Supply Giant 6I52 Flexible PVC Reducing Coupling offers a precision 2.4" x 1.6" inner diameter fit with robust stainless steel clamps, designed for leak-proof, rot-proof connections across multiple pipe materials. Certified to ASTM C1173 and UPC standards, it’s built to withstand harsh chemical, UV, and sewer gas exposure, making it ideal for both indoor and underground sewer, drain, waste, and vent systems. Trusted by professionals for its durability and ease of installation.

Specifications

ASIN	B07C7MT2GG
Best Sellers Rank	#47,784 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1,322 in Pipe Fittings
Brand Name	SUPPLYGIANT
Color	Black
Connector Type	Flange
Customer Reviews	4.4 4.4 out of 5 stars (675)
Exterior Finish	Brass
Global Trade Identification Number	00804595048306
Included Components	Coupling
Item Dimensions	2 x 2 x 3 inches
Item Type Name	Flexible PVC Reducing Coupling with Stainless Steel Clamps, 2" x 1-1/4, Black
Manufacturer	Everflow
Manufacturer Part Number	6I52
Manufacturer Warranty Description	4833, 7.09
Material Type	Polyvinyl Chloride
Model Number	6I52
Number of Packs	1
Number of Pieces	1
Size	2 x 1-1/4
Thread Size	2 inch
Thread Type	NPT
UPC	804595048306
Unit Count	1 Count

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