Is this like other vac fillers where if you don't unscrew the top the rubber seals the feed from the reservoir of ink?

Yes, it will write for a while until all the ink in the feed runs out, so you do need to unscrew the top to continue writing.

Can this pen be filled with a syringe?

it can but it is easier filling from a bottle. To syringe fill it, you need to unscrew the vac fill knob, then you need to unscrew the section. You can then use the syringe to fill the pen, screw the section back on and carefully close the vac knob to make sure ink doesn't burp.

I can't open the barrel on the P20 to insert the cartridge. I've tried to put it in the freezer, I've tried hot water. Is there a secret?

Hi, it is vacuum filling fountain pen, not for cartridges or converter. You can refer to the video instruction at the link below: https://www.amazon.com/live/video/0cf53b0504934d818d3a304f7e1a0296?ref_=dp_vse_ibvc0

Mine doesnt seem to seal all the way as even when the seal is closed ink still gets into the feed if it sits for a few minutes is it defective?

It’s normal for ink to flow into a feed like that with any fountain pen. That’s how a fountain pen works. The vents balance the ink/air flow. If it isn’t leaking out of the nib you’re fine.

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Asvine V126

Product ID: 545882169

Details

Age range (description)
Adult
Brand
Asvine
Colour
Frosted black
Ink colour
Black
Writing instrument form
Fountain Pen

🖤Matte frosted black acrylic body

🧲Vacuum ink system for max capacity

🖋️Extra fine black-plated stainless steel nib

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£36.16

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Description

🖋️ Write your legacy with every stroke.

EFFORTLESS REFILL - Simple piston mechanism lets you fill ink straight from the bottle in seconds.
SLEEK TRANSPARENCY - Frosted black acrylic body reveals the pen’s inner mechanics—modern and bold.
GIFT READY ELEGANCE - Comes in a premium case—perfect for gifting or elevating your desk setup.
INK THAT LASTS LONGER - Vacuum filling system holds more ink than cartridges—no converter needed.
PRECISION MEETS STYLE - Extra fine nib delivers smooth, crisp lines for professional writing.

The Asvine V126 is a matte black acrylic fountain pen featuring a large-capacity vacuum filling system that eliminates the need for converters. Its extra fine black-plated stainless steel nib ensures smooth, precise writing, while the frosted body showcases the pen’s inner workings. Lightweight at 26.5g and packaged with a gift case, it’s designed for professionals who value style and functionality.

Specifications

ASIN	B0C7QHQN78
Additional Features	Refillable
Age Range Description	Adult
Best Sellers Rank	#15,144 in Office Products ( See Top 100 in Office Products ) #119 in Fountain Pens
Body Shape	Round
Brand Name	Asvine
Closure Type	Screw Off Cap
Color	Frosted black
Customer Reviews	4.3 4.3 out of 5 stars (1,067)
Drill Point	Extra Fine
Grip Type	Contoured
Hand Orientation	Ambidextrous
Included Components	Fountain Pen, Pen Case, Instruction Manual
Ink Base	Water
Ink Color	Black
Item Diameter	15 Millimeters
Item Weight	26.5 Grams
Line Size	0_9mm
Manufacturer	Asvine
Material Type	Acrylic
Model Name	V126
Model Number	RISO362SGS
Recommended Uses For Product	Writing
Style	Extra Fine Point
Water Resistance Level	Not Water Resistant
Writing Instrument Form	Fountain Pen

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