We only ship within the United StatesYour Zip:
'/%3E%3C/svg%3E)
Hover image to zoom
1/8" FV4 Auto Air Vent
 --%3E %3Csvg version='1.1' id='Fill' xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink' x='0px' y='0px' viewBox='0 0 100 100' enable-background='new 0 0 100 100' xml:space='preserve'%3E %3Cpath fill='%23F15C02' d='M79.44,0.95H20.56C9.78,0.95,0.95,9.78,0.95,20.56v58.87c0,10.79,8.82,19.61,19.61,19.61h58.87 c10.79,0,19.61-8.83,19.61-19.61V20.56C99.05,9.78,90.22,0.95,79.44,0.95z M65.38,58.24l9.38,29.58L49.69,69.78L24.5,87.82 l9.34-29.6L8.8,39.6l30.73-0.17c0,0,6.98-19.61,10-28.93c0.54,1.36,9.88,29.1,9.88,29.1H91.2L65.38,58.24z'/%3E %3C/svg%3E){kind=small}
Hover image to zoom
$14.35 each
In Stock
Get 386 Wed, Jul 30
MANUALS (1)
Free Shipping On orders over $99
Easy Returns No restocking fee for 90 days
Product Highlights
–
1/8"
Hydronic (Water)
240°F Max Temp
150 psi
33°F Min Temp
33°F - 240°F
Description
–
Series FV-4 Automatic Vent Valves are used in commercial and residential hydronic heating applications to provide automatic air venting for hot or cold water distribution systems. It consists of a brass body construction with male NPT connection, brass cover, air vent with silicone rubber seal, polyethylene float with valve plug, and automatic vent. Series FV-4M1 has a high temperature rating and is ideal for use with glycol systems or for use as an anti-vacuum device. It can also be installed to permit the separation and dispersal of air while fluid is circulating in the system. Can be disassembled for inspection and cleaning. Maximum Pressure: 150psi (10 bar) Temperature Range: 33°F - 240°F
Features:
Features:
- Body and cover are brass construction
- Air vent with silicone rubber seal
- Impurities do not usually affect function as maximum float line of water is always lower than the valve seal
- Float is high temperature resistant polyethylene
- Suitable for use with glycol systems
- Can be disassembled for inspection and cleaning
Specs
–
| Size: | 1/8" |
|---|---|
| System Type: | Hydronic (Water) |
| Min Temp (F): | 33°F |
| Max Temp (F): | 240°F |
| Temperature Range (F): | 33°F - 240°F |
| Max Pressure: | 150 psi |
| Min Pressure (PSI): | 1.45 |
| Material: | Brass |
| Body Pattern: | Straight |
| Mount: | Straight |
| Adjustability: | Non-Adjustable |
| Thread Type: | Male |
| Thread Size: | 1/8" |
Contact
+
Questions?
Customer Support has a delayed opening today for a monthly team meeting to better support you.
Call or text 888-757-4774
Special Hours
9:15am–7:45pm
Monday – Thursday
8am–7:45pm
Friday
9am–7:45pm
Saturday – Sunday
9am–5:45pm
Compare Similar Products
Brand
Size
System Type
Max Temp (F)
Material
Body Pattern
You May Also Need
Product Reviews
4.91 out of 45 reviews
100% would recommend this product
5 star
91%
4 star
9%
3 star
0%
2 star
0%
1 star
0%
Customer Images
Showing 1-10 of 45 reviews
SupplyHouse.com, great parts fast
SupplyHouse always has the part I need at a great price with fast delivery. What more can you ask for!
Steve
Sanborn, New York
5 months ago
Verified Buyer
Was this review helpful to you?
Better quality then what it replaced
Worked as described
Joe S
New York
8 months ago
Verified Buyer
Was this review helpful to you?
I do recommend this
this is a well made product and vents out air like it should in my Solar thermal closed loop Glycol system
Willy
21078
2 years ago
Verified Buyer
Was this review helpful to you?
As described
Easy to change item on system, came quickly
Bob
Pa
3 years ago
Verified Buyer
Was this review helpful to you?
I would by it again.
I like the low profile. And the side port.
David
Illinois
3 years ago
Verified Buyer
Was this review helpful to you?
Great Air Vent Valves
I bought 4 of these auto air vent valves. My old valves on my boiler would no longer vent air from heating system. After replacing with these, i began to hear the " hiss" again. Which means air is coming out of heating system. That means nice warmer heat again. So , i highly recommend these Auto Air Vents For your heating system.
ZenriddleRob
Bronx, NY
4 years ago
Verified Buyer
Was this review helpful to you?
Items work well
Product seems to be working well.
Rick
Duluth, Mn
5 years ago
Verified Buyer
Was this review helpful to you?
Reasonable price work well
Used to vent air from two hydronic loops that are physically higher in elevation within the hydronic system. They worked great to remove remaining trapped air!
Tom
Woodland Park Colorado
5 years ago
Verified Buyer
Was this review helpful to you?
I would recommend your company to friends and family
The product was exactly what I needed. The service and ease of online order was exceptional. I've never been disappointed with any product or service.
Roy
Ririe Idaho
5 years ago
Verified Buyer
Was this review helpful to you?
Vents The Air!
My mother loved this as her Christmas present
Cookie Monster
Kalamazoo, MI
6 years ago
Verified Buyer
Was this review helpful to you?
Product Q&A
3 Questions3 Questions
Q: Do you need to adjust the black thumb screw on top? It's doesn't seem to screw in or out? The one on my furnace seems to drip water out of it. Does that mean it's bad or needs cleaning?
Asked by Bill 10 years ago
Add your answer
-
I'm not a plumber, but I have used these before. My understanding is that the screw cap is opened just a bit so air can escape. If it's leaking water probably means it's rusty and corroded inside. it's a pretty simple matter to remove it and clean it, but you have to isolate it by shutting off valves up and downstream from the vent, if you have them. hope this helps. Mark
Was this review helpful to you?
Q: the piece of plastic inside the threaded end.... do I have to remove it prior to installation?,,, I was under the impresion that the pastic insert is for shipping purposes only, to avoid damaging the float.
Asked by willy 11 years ago
Add your answer
-
That stays - it's connected to the vacuum breaker. http://media.wattswater.com/ES-FV-4M1.pdf
Was this review helpful to you?
-
My understanding of the paddle is that it should be left in place with the installation and that its purpose is to be disturbed by the fluid flow to keep the vent From developing an "air-lock" that interferes with the flow of bubbles out of the system. I installed all of mine in hydronic heating system with the paddles in place and these work fine.
Was this review helpful to you?
Q: What are its dimensions?
Asked by 14 years ago
Add your answer
Verified Reply- PexSupply StaffPleas refer to page 2 of the specifications linked below: http://s3.pexsupply.com/manuals/1322845860917/69070_PROD_FILE.pdf
Was this review helpful to you?
Free Shipping
On orders over $99
We offer flexible shipping and scheduling options, up-to-date delivery estimates, and free ground shipping on any order over $99 to make sure your order gets to you on-time, for less.
Shipping PolicyEasy Returns
Returning items is as simple as 1-2-3
Ordered the wrong product? Item damaged in transit? Our 3-step process makes returning products easy – even up to a year after purchase – with no restocking fees on returns made within 90 days.
Return Policy