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MANUALS (2)
Product Highlights
Description
Taco Hy-Vents are available in a variety of styles including the Slim-Line Hy-Vent and High Pressure Hy-Vent.
With threaded connections 1/8", 1/4", 1/2" and 3/4" and operating pressure ratings up to 150 psi, these brass-body, nickel-plated vents meet the system requirements of even your largest installations.
Specs
| System Type: | Hydronic (Water) |
|---|---|
| Size: | 1/8" |
| Material: | Brass |
| Body Pattern: | Straight |
| Application: | Heating |
| Mount: | Straight |
| Adjustability: | Non-Adjustable |
| Type: | Float-Style |
| Thread Type: | Male |
| Max Temp (F): | 240°F |
| Min Temp (F): | 140°F |
| Temperature Range (F): | 140°F - 240°F |
| Thread Size: | 1/8" |
| Max Pressure: | 150 psi |
| Max Venting Pressure (PSI): | 50 psi |
Questions?
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Product Reviews
Most Liked Positive Review
Works just as it should
Most Liked Negative Review
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Used to be the best
Excellent product
Taco Hy-Vents are a great product; easily serviceable
Solid construction
Works Great
Yes
hy-vent
Best air vent
Quality product
Taco 1/4 Hy-Vent
Would buy again!
Product Q&A
9 QuestionsQ: I have one radiator that gets air trapped in it constantly. Will this go directly on that radiator? If so does it goes where the self bleeding valve is? The radiators are the older ones.
Asked by Rosiebeth06 9 years ago
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Verified Reply- SupplyHouse StaffPossibly, the vent needs to be mounted vertically for it to function properly. This would serve a similar function as the existing bleed valve, only it would work automatically.
Q: Do these need to be installed vertically or can they also be installed horizontally?
Asked by Chris 9 years ago
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Vertically only.
Vertical I believe because they are like a float valve, all the ones I have installed have always been vertical. Sent from Yahoo Mail on Android
Yes, this vent needs to be mounted in the vertical position only due to the float mechanism. The only vent that I know of that can be mounted horizontally is the Taco 417 auto coin vent (never mount upside down). Please read all installation instructions and follow local codes.
Q: What purpose does the small metal flap that extends from the bottom of the fitting serve? Should it be removed before installation?
Asked by Bob 11 years ago
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Verified Reply- Supplyhouse Staffbubble breaker, NO.
No! That flap is part the mechanism that detects and vents gases in the line. Sent from my iPhone
The flap protrudes from the ID of the fitting. I don't know the purpose, but don't trim it off. Just install it into the riser.
I'm not sure what he is talking about because I don't have a fitting to look at. How this valve works is there is a float inside that collects air and the float drops and lets the air out. There may be a tong of some type in the bottom to keep everything aligned and should not be removed or harmed in any way.
Q: After I install this by simply screwing it into the top of the scope above my pressure tank, is there anything else i need to do before opening up all the values again? Does the little screw on top of this Vent need to be tight or loose?
Asked by ralph 11 years ago
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A little loose.
This has a float in it that lets the air out automatically, so as long as it is not leaking fluid (too loose) it should not be tightened, it should be loose.
Tighten the screw, then back it off about a half a turn.
I keep the top cap loose to allow the air to escape. I think if you tighten it, then it will not be able to vent the air. A few drops of water is normal on my system. Sent from my iPhone
Q: I assume there is nothing in it to limit the pressure if the cap is taken off? Will I have to drain the boiler to remove the cap and service this unit?
Asked by PinkyHVAC 12 years ago
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Do you mean the little vent cap? The big "cap" (top of unit)? or the whole unit? In any case, I wouldn't think you would need to drain the boiler. The float inside the unit keeps water from coming out of the little vent cap when there is pressure in the system. If you catch air in the trap, the float then falls and the air comes out of the vent. The little vent cap on top should be left very loose (almost off) when in operation so the air can escape. If you close it tight, the air can't escape. The only time I would ever close that tight would be if the unit is malfunctioning somehow and water is leaking out of it (this sometimes happen when these get old). In that case you might need to close the cap tight temporarily until you can get a replacement unit. If you're talking about removing the whole top of the unit for cleaning or some kind of other maintenance, or removing the whole unit for repair or replacement, then I would just power down the boiler / circulation pump (or if possible, isolate the fitting by closing any appropriate ball valves in the zone), then just bleed off enough water to bring the system pressure down to zero before removing it so you don't get sprayed in the face with hot water. It's only an 1/8" fitting and these are usually placed near a high point in the system. You shouldn't lose much, if any, water if the system is shut down and depressurized and you're just doing a quick replacement. HTH -Mike
Indeed, there is nothing to limit the pressure. You don't necessarily need to drain the entire boiler though - if you close the auto fill valve and then open the boiler drain just enough to reduce the pressure of the water in the system, you should be able to replace the vent with only a minimal amount of water spilling out.
I replace the hy-vent yearly I don't think you should attempt to service it yourself they sell for about 6-8 dollars hope this helps.
I did not replace the hy-vent on my boiler, I replace the one above my expansion tank. When I replaced it I did not drain my system. I simply turned off the boiler and the water supply to the system. I then isolated the hy-vent as much as possible with the valves available in my system. I had minimal water loss when I removed my hy-vent. I hope this helps. Mark S. Grzesiakowski AETD Core Demo Lead Pratt & Whitney
"I assume there is nothing in it to limit the pressure if the cap is taken off? TRUE! IF you get air, fine... If you get water w/o stopping, then it is probably gummed up and needs replacing. PUT / tighten the cap back on!!!! Will I have to drain the boiler to remove the cap and service this unit?" You MIGHT be able to cool system to under 105 deg. (Find a high outlet in the system and CAREFULLY bleed off the pressure.) Then possibly, do a 'quick switch' of the parts. You MIGHT get a bit of water still, should be minimal if system is closed all over. IF you are going to shut down & bleed down consider the following. When I am replacing / re-fitting parts on our home heating system, I think back to all the mess and problems of earlier 'adventures' in home heating repairs. NOW, I tend to preemptively engineer the project to the extent of providing shut-offs (ball valves) so I can replace air vents or reliefs. ( For critical "stay open" lines , such as a relief >> RED - painted handle and Lock-WIRED open ). It costs a little more, but it gives the ability to perform hot swap-outs w/o having to drain or shut down the system. Remember, Not a lot of people work on this stuff in the summertime.
Q: have about 14 of these on different systems dating from 03-05 to 04-08 After cleaning out a couple on one system found that the plastic needle valves don't seat well enough to stop bleed by. Can these parts be replaced. I can't find anything that shows parts but if they aren't available it would seem a waste of money to buy these "servicable" ones over ones that are throwaway and alot cheaper. ?????????
Asked by 0000 14 years ago
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Verified Reply- PexSupply StaffThere are no replacement parts to this Hy-Vent, so the entire vent would have to be replaced if the unit is defective.
Q: My vent also is leaking, opened it and found fine black sediment clogging all the works. What can I use to clean it?
Asked by 14 years ago
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Verified Reply- PexSupply StaffWe would recommend that you use a mild soap detergent.
Q: How do you or can you service this vent? Ours is leaking out the top of the bleeder cap. I screwed the cap tight to stop it from leaking.
Asked by Joel 15 years ago
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Verified Reply- PexSupply StaffYou can service this vent by removing the cover and cleaning/checking the float inside the unit.
Q: What is the difference between the 03 08 and the 04 08 valve? I have a failed valve on my hot water solar (PV) panel that is a 03 ITALY 08 and need a replacement.
Asked by Pat 15 years ago
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Verified Reply- PexSupply StaffThere is no difference: they are the same valve. The different numbers represent dates of manufacture.