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MANUALS (2)
Product Highlights
Description
Features:
- Float-type vent
- For ordinary one-pipe system that doesn't require proportional venting
- Single non-adjustable port
- 1/8" NPT angle connection
Specs
| Application: | Radiator Vent |
|---|---|
| Size: | 1/8" |
| Type: | Float-type Vent |
| System Type: | Steam |
| Max Pressure: | 10 psig |
| Max Operating Pressure: | 6 psig |
| Mount: | Angle |
| Adjustability: | Non-Adjustable |
| Material: | Steel |
| Body Pattern: | Angle |
| Thread Type: | Male |
| Temperature Range (F): | 140°F - 240°F |
| Min Temp (F): | 140°F |
| Max Temp (F): | 240°F |
| Thread Size: | 1/8" |
Questions?
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Product Reviews
Most Liked Positive Review
Radiator vents are a wear item
Most Liked Negative Review
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Not a bad looking valve
I would purchase again.
I would buy this product again.
Much better
After 5 years, this is the only brand that hasn't failed
Very quiet yet not venting enough for my application
Exactly what I needed.
timely delivery
These are the best money can buy.
Great service! Great quality! Solid pricing!
I will need to use this product on an annual basis.
Product Q&A
3 QuestionsQ: Can these be used in a hot water radiator application?
Asked by Mike 12 years ago
Add your answer
No. These are for steam systems only... Different psi and fitting... Steam systems go from 3-5maximum pressure and hot water systems are 12-15 psi.
NO!
Q: Why is my radiators making a hammering noise some times...???
Asked by Ron 14 years ago
Add your answer
For single-pipe steam systems, water hammer occurs when the fast moving steam picks up water droplets and throws them into elbows at about 20 mph. This can be caused by a number of factors from improperly graded lines (they should all tilt toward the boiler eventually) to too-fast venting. Dan Holohan's The Lost Art of Steam Heating is a must-have book for single-pipe steam homeowners.
Water hammer occurs when water shuts off suddenly and the fast-moving water rushing through the pipe is brought to a quick halt, creating a sort of shock wave and a hammering noise. Bleeding air out of the system can resolve this issue.
if your water level is too high in the steam boiler it also can cause water hammer due to steam picking up excess water and carrying it through the pipes.
Q: Hi, I am looking for 1 of these,but I am not sure if this would work on my radiator. The air valve that I have on mine is a Dole 1A. The problem that I am having is that only 4 of the 12 fins heat up. I was told that there is most likely water in my radiator. So I took out the radiator and emptied what was probably 8 to 10 ounces of water and still the radiator does not heat up all the way. Any advice on what I can do?? Is it actually the air valve that is shot? Thank You
Asked by John 15 years ago
Add your answer
Verified Reply- PexSupply StaffThe replacement air vent for the Dole A1 is the Hoffman 401422. There could be a few issues with the steam system that could cause unheated radiator issues. You have to make sure that all the boiler piping is pitched back towards the boiler. You have to also make sure that your boiler is big enough for all the radiators in the system. If the boiler is to small they you will not get steam to all the radiators.
Another remedy would be to shim the vent side of the radiator up a little bit so the water can run back down the pipe. Also, improper venting will cause the rad to not heat the whole way.