I use aquarium tubing to siphon gas out of my snow blower into my lawn mower in the spring time. Then I make sure it is drained and left out in the sun to evaporate out, then I throw it away. My guess is that this tubing should work well for short minutes of durations like that and then make sure it has at least a week chance to dry out before disposing of it. I would never use tubing not rated for gas lines to fix a gas line on a lawn mower or anything like that.

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Penn-Plax

Q: will this tubing fit the 40 mil. airstone?

No It will not 40 Mil. Is way to big. That is 1.75 inches round. However 4 mil is a bit under 1/4 inch. A 1/4 inch is equal to about 6 mill I would say that This tube is 6 mil and it fits real tight over the 1/4 inch fitting of the air pump. So much so I had to Chew the end to loosen it, Then shove it on. It works.

Q: if my air pump fails, will all the water back-flow and flood the room?

If your pump fails in a very unusual manner, such that both check valves fail, and if it continues to pump with the outlet check valve actually functioning backwards, then it is remotely possible that the water could backflow into the room. But... none of that happens in real life; it only happens in comic books. If your pump fails, it will just stop pumping but both check valves will remain intact so the air line will continue to hold some small amount of pressure until you notice that all your fish are dead and your tank is sans bubbles. In order to start a siphon, which might drain your tank, there would need to be a fair quantity of water in the tubing OUTSIDE your tank, the weight of which will draw suction. What's more, that fair quantity of external water needs to be BELOW the (top) surface of the water in your tank. So... for all intents and purposes... no. It's not going to happen.

Q: will this tubing fit on 4mm(air stone) and 5mm(check valve) outer diameter connections?

It will not. It might fit on 3.5mm fittings, because that's the inside diameter of this tubing.

Product ID: 829228

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Details

Brand
Penn-Plax
Material
Plastic
Color
Clear
Product Dimensions
3.25"L x 1.5"W
Item Weight
0.11 Kilograms
Maximum Pressure
55 Pound per

🌊safe for fresh & saltwater

💪kink-resistant durability

📏25 feet length

Frequently Bought Together

Penn-Plax Standard Airline Tubing for Aquariums – Clear and Flexible – Resists Kinking – Safe for Freshwater and Saltwater Fish Tanks – 25 Feet

AquaMiracle Aquarium Air Pump Commercial Air Pump with Aluminum Housing, 600/1000/1200/1750GPH Fish Tank Bubbler Pond Aerator for Aquariums, Ponds, Hydroponics

VIVOSUN Air Stone 2PCS 4 x 2 Inch Large Air Stone for Aquarium, Fish Tank and Hydroponics Air Pump

Description

📏💧 Keep your tank breathing easy with tubing that’s as flexible as your aquatic ambitions!

BUILT TO LAST - Flexible yet tough plastic resists kinks, cracks, and brittleness—ensuring long-term reliability.
FISH SAFE ASSURANCE - Non-toxic, aquarium-safe material supports healthy environments in both freshwater and saltwater tanks.
UNIVERSAL COMPATIBILITY - Perfect 3/16” (4mm ID, 6mm OD) size fits air pumps, air stones, and filters with ease.
SEAMLESS AQUARIUM INTEGRATION - Ultra-clear tubing virtually disappears underwater for a sleek, professional look.
GENEROUS LENGTH FOR VERSATILITY - A full 25 feet of tubing means you’re always ready for upgrades, expansions, or emergency replacements.

Penn-Plax Standard Airline Tubing offers 25 feet of clear, flexible, and kink-resistant plastic tubing designed for aquarium use. With precise 3/16” dimensions, it ensures secure connections for air pumps and accessories in both freshwater and saltwater tanks, providing durable, fish-safe performance that blends invisibly into your aquatic setup.

Specifications

Brand	Penn-Plax
Material	Plastic
Color	Clear
Product Dimensions	3.25"L x 1.5"W
Item Weight	0.11 Kilograms
Maximum Pressure	55 Pound per Square Inch
Nominal Wall Thickness	1 millimeter
Outside Diameter	6 Millimeters
Item Length	25 Feet
UPC	030172350252
Manufacturer	Monster Pets
Specific Uses For Product	Indoor
Global Trade Identification Number	00030172350252
Part Number	ST25
Item Weight	3.87 ounces
Item model number	ST25
Is Discontinued By Manufacturer	No
Size	25 Feet
Style	Plastic
Pattern	25 Feet
Shape	Round
Item Package Quantity	1
Included Components	Penn-Plax Standard Airline Tubing for Aquariums – Clear and Flexible – Resists Kinking – Safe for Freshwater and Saltwater Fish Tanks – 25 Feet
Batteries Included?	No
Batteries Required?	No
Warranty Description	Warranty

Have a Question? See What Others Asked

will this tubing fit the 40 mil. airstone?

can it hold gas

if my air pump fails, will all the water back-flow and flood the room?

will this tubing fit on 4mm(air stone) and 5mm(check valve) outer diameter connections?

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