Air in the line

Plumdog_2

to feed in water at a much higher velocity. The gremlins will be forced out the other end where you can drown them in a bucket. This is tricky, as you must block one of the escape routes so they have to go the long way around, and shut off the valves in a synchronized way so that pressure stays in, and the gremlins are trapped outside the pipes.

Jim_146

running water sound in the pipe

This past summer I installed additional hotwater baseboard heat radiators in two rooms. Instead of taking the copper
completely across the wall, thru the next wall, I dropped
the 3/4" line down and then up again in the next room.
Now the heating season is just starting, I fired up the boiler...I opened the manual adjusters on one end of each 10' section of radiant...the two new baseboard heaters heat up well....after I bled out any air. However, I continually hear what sounds like water trickling in the pipe when the circulating pump is running with that zone valve calling for heat. My guess is it's air trapped between the two units...both get hot but the gurgling sound is baffling. It seems to be in the area between the two heaters. Any ideas? thanks JM

martin

gurgling sound

Being the time of year it is you might have caught a gremlin in the pipe during assembly. Be careful not to open your bleeder wide open cause they can slip out of a pretty small hole and are ussually pretty POed.Have a big hammer handy. No seriouslly you probablly still have some air caught and might have to purge a couple of times to elimnate it. Also check your pressure on the system, should be 12 to 17 PSI depending on 1 or 2 floors if boiler in basement.

Jim_146

Gremlins


I got the hammer handy, thanks! It is a two floor system and I have 20 lb of pressure. Maybe I should replace those manual air adjusters, with auto adjusters? tnx again! JM

martin

auto adjusters

I've never had to go to that extent I've seen auto adjusters leak when you dont want them to.Do you have any humps in the piping or such.

Jim_146

Humps in the pipe


Gee, I'm afraid the pipe does dip down and back up again between the two baseboard units...I took the copper down
under the wall to the next room then back up again. I kind of know that the trapped air is in that area and no air adjuster is apt to get it out of there. What are my options? JM

martin

Humps

Humps are worse than gremlins the're very reclusive. Is this a series loop system or monoflow. On series we dont use vents at rads but purge at return. on monoflow you're cooked. But if your getting heat with luck the water will absorb the air over time.

Jim_146

Luck vs repipe


Thanks again for the input. This is not a Monoflo system.
Both baseboard units get nice and hot...it's that little brook sound that is perplexing. It's only been a few days, maybe the air will move out...I have manual bleeders, so I'll have to stay with it...thanks again. JM

martin

Repipe

Since this is a series loop just install apurge fitting at return near boiler, and never screw with the baseboard vents again. You just blow the air thru with water pressure.

bob young

it might already be set up for purging.