At what PSI does a plastic soda bottle explode? (home CO2 carbonation)

This tire volume calculator works better:

So a four-foot manifold with eight 2L Coke bottles hanging down would completely fill one tire.

From: Coca-Cola Support

That's no volume control - it's an on/off switch. They can say whatever they want but I own one. Any touch strong enough to release the air causes enough noise to make someone jump.

I own 2 on bicycles and one hand held I use as a backup on my boat. There is a VOLUME CONTROL on the side. It is a little knob connected to a cam that squeezes the air tube to reduce volume.

Once again...

RTFM

I'll take a look - that would be a good thing. I don't recall that I ever saw a manual.

It's one of the bright red or orange bits on the side. Just a little lever attached to a cam that constricts the hose as you rotate it.

You are correct and you have made my life a little bit better. That horn was really too loud and now I can attenuate it so the target doesn't die of a heart attack. It gets so messy when that happens.

I have to attach it to my new bike. I don't bother using it during the winter because there aren't that many joggers clogging the bike lanes. Now they're out in full force.

For pedestrians and joggers, I find that clicking my brake levers is usually sufficient to alert them. It doesn't hurt to call out "On your left" as you approach, so they hopefully don't move the wrong way to evade you.

I use the horn (at full volume) for cars that do anything threatening, like pulling out of a driveway yakking on their cell phone.

It's very effective at getting their attention.

I hydrostatically tested one at 150 psi (a cheap thin one) and it was just fine. HTH :-)

Bob

Clicking the brake lever? For folks blasting music into their ears? I have an actual bell on the bike and they don't hear that.

If they have ear buds and music blasting, then obviously I blow the air horn.

I can also yell and whistle pretty loud.

Yes. Burst design value is 200PSI. Burst testing regularly done a most PET bottle blowmold mfg plants. It's part of quality control.

Can they blow a lower pressures? Certainly. Nothing's perfect. Sometimes they pop at higher pressures. Bottles go through SIGNIFICANT deformation before popping. Will they pop at normal usage pressures? Not likely. Coca Cola & Pepsi have billions at stake to lose in lawsuits from angry consumers and hungry lawyers. They R not fools. Their PET bottle do not often pop at 55PSI common working pressure. One out of a trillion? quintillion? billion? I have no clue. But not often enough for them to lose money. Otherwise they'd make their bottles thicker and stronger.

Interesting graphic documentary...

Interesting videos... Popping one with co2 powered keyboard dust blower...

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It's amazing you got a letter from them telling you anything at all. If you wanna blow $100, you can buy the voluntary spec's publication from the beverage producers association. That document is supposed to cover in detail all aspects of PET bottle design voluntary standards.

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Many people are using nitrogen in their tires now and paying a premium for it. The benefits are not so from the physical qualities of the gas, but th e fact that the gas contains absolutely no water. So the tire pressure cha nges less due to temperature changes.

Be careful you know they don't check them all, only a significantly large statistically relevant sample. A bad batch of plastic and not all the defectives may be removed be fore shipping.

Some of the benefits most certainly are from the physical properties of the gas. Aside from the benefits due simply to lack of water vapor, the hydrogen migrates less thru the tire structure and that makes the tire pressure stay up longer then when you use plain old air. In addition, the nitrogen does not oxidize the tire materials the way the oxygen in plain old air does and that also is beneficial to tire life. All that said, for most people the benefits of nitrogen are relatively small and if you pay much for it you may not recover that extra cost. For truckers the benefits are much greater,particularly the benefits of the tire components not being oxidized since they will retread a truck tire many times over it's carcass life. And with nitrogen the carcass will last longer.

I've heard that you can use metal lamp connector rods that are threaded on both ends. Apparently someone did that with water bottle rockets.

replying to tmovoice, Tom Lifeson wrote: When I was stationed in California, back in the 80's, I used to belong to the "Soda Butler" service. Monthly they'd bring a new CO2 cylinder, the soda syrups of your desire, and new 2 liter bottles, if need be. The regulator was set to