How do air vent caps work?

[@homediddy383]

Is the hygroscopic air vent food safe? Im in the early stages of building a portable drinking water storage tank that will need to be able to be vented but not let any water out regardless of the orientation of the tank.

[@Jorge.O85]

So it has to be opened ? By haft turn ? Not complety close. ? So of theres air inside the pipes i will hear the horrible noise inside ?

[@drizzydre8894]

I just took my heater cover off and only see a black rubber piece like the one you had on table in front of you. Should I put it back on? Because it’s been off this whole time and I didn’t know

[@CaleffiHydronicSolutions]

Hello! If you are referring to the black plastic cap, you can install it and leave it loose to allow air to be removed. In the event that debris might cause water to leak out of the top, you could close it tight to stop water from exiting until you can replace the unit or provide maintenance.

[@shelby50411]

my cap is red plastic and its not solid on top it has two tiny holes / slots openings on each side

[@randy_constan]

I've an unusual need in an air valve and I don't know the proper word to describe it. I want to install it at the top of a swimming pool filter, and its purpose would be to allow air to escape, but close as soon as the water reached it. The need is due to the fact that the pump inevitably draws some air, which then accumulates at the top portion of the pool filter. That condition prevents as much as 1/2 of the inner filter cartridge from being properly used. The filter has a manual valve at the top for letting out air when a new filter cartridge is installed, but its intended to be manually closed once water starts pushing out. If I were to build what I'm looking for, it would simply be a vertical tube, narrowed at the top, with a heavy hollow ball inside, which would sink to the bottom as long as air was flowing, but float to the top and block exit once water pushed into the tube. Does such a valve exist? Would it be one of the ones you are describing? Thanks for any assist!

[@danila1988motovilov]

Было бы хорошо если бы было на русском, я английского не знаю, поэтому ничего не понимаю, хотя с удовольствием продаю ваш продукт;) Действительно качество на высоте. Аналогов нет!

[@CaleffiHydronicSolutions]

Данила Мотовилов Спасибо за твое сообщение. Мы над этим работаем! А пока ты видел плейлист на русском языке? Может сможешь начать с него.....Продолжай следить за нашей информацией!

[@peteseer6931]

Is it recomended to leave these in the open or closed position?

[@shelby50411]

hi i have a water boiler boiler heating system that is leaking water at the top of the air vent part..the red cap is broken is water suppose to be coming out when cap is off or broken? th

[@readysetsleep]

I hope you fixed it after 2 years...

[@sweetvuvuzela4634]

Nope it’s not supposed to it needs replacing or cleaning of it properly

[@Jerseyhighlander]

Is there ever a point when you do want water dripping out of your air vent cap? Don't think I've ever been there.

[@CaleffiHydronicSolutions]

Thank you for your inquiry. Water dripping out of an air vent cap can be a sign that dirt or debris is in the discharge port. The float inside is designed to close the air vent discharge and maintain a small pocket of air above the float. If water is dripping out, that is a sign that water and debris has gotten above the float and is holding the discharge port open slightly allowing the water leakage.