What keeps air from going through the threads on bleeder screw when releasing pedal?

if you have a crumby bleeder screw and brake calipers that has a lot of high tolerance in between the threads then some air can get thru the threads. just don't unscrew the bleeds screw/zerk all that much. you can tell if the threads were cut with a crappy tap on the caliper when you get brake fluid to also leak around on the threads. I know that the FJ cruisers have that issue from personal experience, but haven't really had a hard time with while brake bleeding other vehicles.

Is it supposed to weep out brake fluid out of the top while your bleeding brakes? Mine does between the black plastic nipple and the red cap.

The black plastic nipple is a vent to relieve pressure as the bottle fills with fluid forced in through the center hose. I usually empty the bottle when it's about half full so brake fluid never gets near the vent. This bottle has been used extensively and I have yet to see any fluid weep around the vent.I hope this helps.

Does this have a one way check valve to keep fluid from going back into the caliper when depressing the brake pedal?

Yes, it worked great. Was able to bleed the brakes without any help.

Should the bottle be positioned above or below bleeder valve?

above the bleeder valve works better

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Allstar Performance ALL11017 Bleeder Bottle with Magnet and Check Valve , White

Product ID: 15068231

Details

Bottle Type
Reusable
Brand
Allstar
Capacity
16 ounces
Color
White
Material
Plastic

💧16 oz fluid capacity for extended use

🔄One-way check valve prevents air intake

🧲Magnetic mount for hands-free convenience

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Description

🛠️ Bleed like a pro—hands-free, hassle-free, and air-free!

AIR FREE BLEEDING - Built-in one-way check valve ensures no unwanted air sneaks into your brake system—precision guaranteed.
REUSABLE DURABLE - Crafted from sturdy plastic and designed for repeated use, this bottle is your long-term brake bleeding partner.
UNIVERSAL FIT HOSE - 12-inch flexible tubing fits most bleeder valves, making it your go-to tool for any vehicle.
MAGNETIC MOUNT MASTERY - Secure your bleeder bottle effortlessly with a powerful magnet—no fumbling, just focus on the job.
GENEROUS 16 OZ CAPACITY - Bleed more brakes in one go without constant refills—efficiency meets convenience.

The Allstar Performance ALL11017 Bleeder Bottle combines a magnetic mount, 16-ounce capacity, and a one-way check valve to enable efficient, single-person brake bleeding. Its 12-inch flexible hose fits most bleeder valves, preventing air contamination during the process. Durable and reusable, this white plastic bottle is a must-have for automotive professionals and enthusiasts seeking precision and convenience.

Specifications

ASIN	B00F9XHVKA
Additional Features	Check Valve
Age Range Description	Adult
Best Sellers Rank	#18,808 in Automotive ( See Top 100 in Automotive ) #39 in Brake System Bleeding Tools
Bottle Type	Reusable
Brand Name	Allstar Performance
Capacity	16 ounces
Color	White
Container Type	Liquid
Customer Reviews	4.6 4.6 out of 5 stars (2,339)
Finish Types	White
Global Trade Identification Number	00848238056792
Included Components	Brake Bleeder Bottle, Magnetic Mount, Check Valve / Plastic Tubing
Item Dimensions W x H	6"W x 2.5"H
Item Type Name	Bleeder bottle
Item Weight	4.96 ounces
Manufacturer	Allstar Performance
Manufacturer Part Number	ALL11017
Manufacturer Warranty Description	90 Days
Material Type	Plastic
Model Name	ALL11017
Model Number	ALL11017
Number of Items	1
Number of Packs	1
Part Interchange Info	ALL11017
Product Care Instructions	Hand Wash Only
Recommended Uses For Product	Workouts
Reusability	Reusable
Shape	Cylindrical
Style Name	Magnet and Check Valve
Theme	Automotive
UPC	763273188096 848238056792
Unit Count	1 Count

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47798CFA

Duties & taxes included

In stock

Sold byAmazon Cote D' IvoireDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Cote D' Ivoire.

Secure transaction

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