Model # 400-4

Internet #202312925

Store SKU #748457

null 1/8 in. Hy-Vent
0687752581096

1/8 in. Hy-Vent

$1398 /each

Overview

The Taco Hy-Vent has become the industry standard for dependable long life service. The TACO 1/8 in. Hy-Vent can be easily serviced by unscrewing the vent cap. It is designed to purge unwanted air from the hydronic installation to help improve system efficiency.
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Frequently Bought Together

Product Overview

The Taco Hy-Vent has become the industry standard for dependable long life service. The TACO 1/8 in. Hy-Vent can be easily serviced by unscrewing the vent cap. It is designed to purge unwanted air from the hydronic installation to help improve system efficiency.
  • Automatically purges unwanted air from the hydronic installation to help improve system efficiency
  • Attaches to the boiler, or it can be used throughout the system
  • Nickel-plated, brass-body construction
  • Operating pressure ratings of up to 250 psi
  • Note: product may vary by store

Product Overview

Model #: 400-4
Sku #: 748457
Internet #: 202312925

The Taco Hy-Vent has become the industry standard for dependable long life service. The TACO 1/8 in. Hy-Vent can be easily serviced by unscrewing the vent cap. It is designed to purge unwanted air from the hydronic installation to help improve system efficiency.

  • Automatically purges unwanted air from the hydronic installation to help improve system efficiency
  • Attaches to the boiler, or it can be used throughout the system
  • Nickel-plated, brass-body construction
  • Operating pressure ratings of up to 250 psi
  • Note: product may vary by store

Info & Guides

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Specifications

Dimensions

Product Depth (in.)
2
Product Height (in.)
3.75
Product Width (in.)
2

Details

Accessory type
Boiler Replacement Part
Heating Product Type
Accessory
Heating Technology Type
Convection
Product Weight (lb.)
0.5lb
Returnable
90-Day

Warranty / Certifications

Manufacturer Warranty
0

Specifications

Dimensions

Product Depth (in.)
2
Product Height (in.)
3.75
Product Width (in.)
2

Details

Accessory type
Boiler Replacement Part
Heating Product Type
Accessory
Heating Technology Type
Convection
Product Weight (lb.)
0.5lb
Returnable
90-Day

Warranty / Certifications

Manufacturer Warranty
0

Questions & Answers

Should the hy-vent be fully closed and opened to bleed air or should the hy-vent be open about 1/4 turn all the time. ty

Asked by: Gus
I leave my vents closed all the time and only vent them manually by opening the caps when I need to vent each convector or boiler. That way, you don't need to worry about water leaking on the floor if the mechanism inside the vent would ever malfunction.
Answered by: Hawk
Date published: 2017-11-22

I have alot of noise in my hot water baseboard system this season. I use a manual bleeder upstair...

I have alot of noise in my hot water baseboard system this season. I use a manual bleeder upstairs, and have one similar to this installed above the expansion tank for the furnace, but it's very old, and very corroded. I assume this is part of the problem, and that this unit will work as a replacement?
Asked by: Amert
Expantion an contraction maybe the high limit was turned up for some reason
Answered by: Kaoss
Date published: 2017-11-12

Why does this fail and need replacing every year?

The original relief lasted 10 years from when system was originally installed. Now I can't go more than a year and this item fails.
Asked by: kvet
Is your system filled with glycol to prevent freezing if so glycol has less viscosity than water it's like a surfactant this could possible be the reason I have never seen them fail every year except for that reason
Answered by: Kaoss
Date published: 2017-11-12

Should these vents be installed on the highest possible point of the heating system? I have one i...

Should these vents be installed on the highest possible point of the heating system? I have one installed on my top floor baseboard heat and works fine. The second one is installed on my basement level heat on the return (circulator) side. It is about a 16" above the boiler. It never works to vent air out.
Asked by: Smitty
There is no certain and consistent answer to your question. Meaning I can not say "you should always install the vent here". It all depends on your individual system and the methodology that was employed when it was installed. In the case of a new system you would not use a vent like this at all. You would use a vent often referred to by the brand name Spirovent. That style of vent is so effective that any other vent on the system has a greater chance of letting air in and letting it out; so no other vent should be used. Now as a general rule older systems will have one vent on top of the air scoop which would be on the boiler feed. This vent should get rid of any micro bubbles that were between the water molecules , that where left behind when the system was purged. Once all the air is removed the vent may not do anything for years. When you see additional vents up on the baseboard that usually means that either due to the piping configuration or some other oddity the system has a tendency to form a air pocket in some place. As the contractor was unable to figure out why and correct the problem, a vent was added to make the symptom go away. Keep in mind all heating systems leak, just like all cars leak oil. Its never a question of if but of how much. With a heating system this can be a very small amount that evaporates as fast as it leaks. The water is replaced by the automatic feed valve. That new water will have oxygen in it. So that oxygen can collect and air bind the system. This is why those additional vents are cut into the line later. Chris 978 651 3301
Answered by: chris
Date published: 2017-11-22
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Customer Reviews

1/8 in. Hy-Vent is rated 3.0 out of 5 by 8.
Rated 1 out of 5 by from I bought two of them to replace the existing Hy-Vent's that lasted for 15 years one was just rele... I bought two of them to replace the existing Hy-Vent's that lasted for 15 years one was just releasing a little water when the cap was opened (old one appeared to have more brass and less plastic). This was 4 years ago. Our oil provider was acquired and didn't move the delivery schedule and we ran out or oil and the boiler cooled. When I discovered this I also discovered water all over the floor. Discovered that both new Hy-Vent's were leaking with the relief cap closed. Put a 5 gallon bucket and in 12 hours had about 4 gallons of water. After getting oil and getting heat back into the system the vent stopped leaking. Must be something associated with the switch to some plastic. I am going to switch to a different vent. Maybe a Watt's vent.
Date published: 2017-12-05
Rated 1 out of 5 by from Leaks less than a year I went through two of these in less than a year. They leak around the air vent plastic that the cap screws on. Replaced with a Honeywell FV180 this time, hopefully this will hold up better.
Date published: 2013-01-11
Rated 5 out of 5 by from needed for well water We live in the mountains where natural gas is abundant . Noticed the hot water would spurt and spit when turned on, sometimes extreme. Holding lighter at faucet when this occured produced flames from the water. Decided to try this as a cheap way to stop this. On hot water outlet side of the water heater added a T fitting. Out of the side port added a small length of pipe to a 90 degree fitting and then up to our hot water pipe. Straight out the top of the T added pipe to just below ceiling and used a 90 degree fitting with a 1/8 inch female port to fit the hydro vent and plugged the other side. Put plastic tubing on the air vent and ran it to the outside of wall. We can now turn on the hot water and no more spitting and sputtering and explosive venting from the faucet. Have to think outside the box.
Date published: 2016-08-16
Rated 1 out of 5 by from Nor durable Did not last, starts leaking at the cap within a year
Date published: 2014-02-15
Rated 1 out of 5 by from Avoid if can Buy it as a temporary fix but my original one lasted 23 years, and this Taco one just rotted apart after only one year. Taco not so great anymore.
Date published: 2016-06-25
Rated 5 out of 5 by from Excellent vent for baseboard convectors Very easy to install. Just put a small amount of plumbers teflon pipe seal paste on the threads and hand tighten the unit...no tools needed! I purchased these to replace my old maid-o-mist air vents. After you put your system back in service, just loosen the top thumb nut to release the trapped air- you hear the air rush out and then the unit stops the flow. Then, you just hand tighten the thumb nut again. This prevents any leakage or spitting from the unit. The other reviewers wrote bad reviews because they did not know how to use these devices properly. You just loosen the top nut, let out any air (you can hear it release and internally snap shut), then tighten the nut again. The other reviewers could solve their problem by simply following these directions. Do not follow the manufacturer's recommendation..to loosen the top nut one turn and leave it that way to automatically release the air - you should tighten the top nut and only loosen it when you want to manually release any air, then tighten it so you won't get any water leakage if some dirt or scale gets inside the mechanism and allows water to get out. Always tighten the nut on top after releasing air!
Date published: 2015-09-12
Rated 5 out of 5 by from excellent! It's equal if not better in quality compared to o.g. mudbone.
Date published: 2011-11-01
Rated 5 out of 5 by from Perfect ! Easy to install East install. glad I bought from Home Depot great staff to help
Date published: 2014-09-02
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