Does it work with glass water bottles (such as pellegrino bottles)? Thanks.

NO! Don't ever try to force carbonation into a glass bottle, unless you want to be blasted with shrapnel from the bottle when it explodes! These are for plastic PET bottles only.

What size is the big flat o ring on the inside? I need a replacement for my carbonator cap.

Hello,the size of the big O-ring inside are 26mm(outside diameter),18mm(inner diameter),4mm(line diameter).Thank you !

I've just got one of these, and it leaks when connected to a normal pet bottle. is this what the o-ring is for? or do i have a deffective unit?

Make sure the inner metal piece..the one with the hose Barb..is tight. It screws into the main part of the cap. Also that large washer is key to getting a good seal on the bottle. Mine gets screwed down so tight that when I remove the cap it's inside the mouth of the pet bottle.

will this take both liquid and gas assemblies?

Yes, you can use the liquid or gas assemblies ( liquid ball lock or gas ball lock)

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FERRODAY Stainless Steel Carbonation Cap, Carbonator Cap with 5/16 Barb

Product ID: 323783811

🔄Includes extra food-safe gaskets & O-rings for no-leak durability

⚙️5/16” barb for secure, leak-free CO2 connection

🛡️Heavy-duty stainless steel, rust & corrosion-proof

131.92 DT

Duties & taxes included

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Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🍺 Elevate Your Homebrew Game with Stainless Steel Precision!

LEAK PROOF SEAL EVERY TIME - High-resilience food-safe rubber gaskets guarantee airtight connections—no spills, no waste.
READY FOR ACTION WITH EXTRAS - Comes with replacement O-rings and gaskets so you never miss a beat in your carbonation game.
VERSATILE MULTI FUNCTIONAL - Perfect for carbonating beer, soda, water, or juice, plus ideal for cleaning beverage lines with ease.
EFFORTLESS FORCED CARBONATION - Simply attach to standard PET bottles and ball-lock disconnects for quick, professional-grade carbonation.
BUILT TO LAST BREW TO IMPRESS - Premium stainless steel ensures rust-free, long-lasting carbonation for your homebrew masterpieces.

The FERRODAY Stainless Steel Carbonation Cap is a durable, corrosion-resistant accessory designed for forced carbonation of homemade beverages. Compatible with most soft drink PET bottles, it features a 5/16” barb for secure CO2 attachment and includes extra food-safe gaskets and O-rings to ensure a leak-proof seal. Ideal for homebrewers seeking professional-quality carbonation and easy maintenance.

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