Will the openings stretch overtop of a connector?

The diameter of the spring coil is 3 in, and the PVC and foil liner is a little bit inside of this. I was able to stretch the liner and get the connector inside, but it might be worth going with the next size up.

Is this UL approved for dryer venting?

No. I wouldn’t use this. Higher temperature applications require a different flex usually all aluminum for dryer venting because of the moisture levels being exhausted.

What is the inner diameter ? will this fit to 3" pvc ? i am trying to use it for the intake and outtake of tankless water heater

Inner diameter is 75mm, fit to 3"

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🖤 Flex your airflow with stealth and silence!

BUILT TO LAST - 3-layer reinforced design with aluminum foil, PET, and steel wire helix resists rips and maintains shape under pressure.
TOTAL LIGHT BLOCKOUT - Thick black PVC layer ensures zero light leaks, perfect for sensitive grow tents and stealthy setups.
WHISPER QUIET VENTING - Cut noise pollution by up to 50% with advanced silencer tech—peaceful airflow guaranteed.
EFFORTLESS INSTALLATION - Flexible 16-foot ducting slides on easily and can be custom-cut to fit any space or system.
VERSATILE AIRFLOW SOLUTION - Ideal for HVAC, grow rooms, kitchens, bathrooms, and dryer vents—upgrade your air circulation game.

The Hon&Guan 5 inch Air Duct is a 16-foot long, black flexible ventilation hose engineered for superior noise reduction, lightproofing, and durability. Its triple-layer construction combines PVC, aluminum foil, PET, and steel wire helix to ensure a rip-resistant, shape-retaining duct ideal for HVAC systems, grow tents, dryer rooms, and kitchens. Designed for easy installation and optimal airflow, it enhances drying efficiency and air circulation while preventing light leaks and noise disturbances.

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Brand	Hon&Guan
Material	Alloy Steel, Aluminium, Glass, Polyester
Colour	Black
Product Dimensions	4.88L x 0.13W Meters
Maximum Pressure	5 Bars
Nominal Wall Thickness	0.08 inch
Outside Diameter	5.28 Inches
Item Length	192 Inches
Manufacturer	hp
Specific Uses For Product	ventilate
Item part number	USPI429
ASIN	B07H27G2L9

Hon&Guan 5 inch Air Duct - 16 FT Long, Black Flexible Ducting HVAC Ventilation Air Hose for Grow Tents, Dryer Rooms,Kitchen

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