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Rick
Rick, HVAC Supervisor
Category: HVAC
Satisfied Customers: 19521
Experience:  40+ yrs. experience as a licensed oil & gas technician.
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Why is a radiator throwing water? May there is much water in

This answer was rated:

Why is a radiator throwing water? May there is much water in the boiler?

Rick :

Welcome, my name is XXXXX XXXXX I will do my best to help you with your issue.

Is this a steam radiator?

Customer:

yes

Rick :

Where was the water in the glass before you drained the boiler?

Rick :

what level in the glass

Customer:

just a little bit

Rick :

The glass should be half to 2/3"s full

Rick :

If there was hardly any water in the glass and you have water spitting out the air valve then either the return line for that radiator is plugged or the radiator valve at the floor isn't wide open

Customer:

yes, I fill the tank with more water, the level did not go up. I turn the boiler and I got water leaking in the radiator

Rick :

you mean you fill the boiler

Customer:

yes I filled the boiler but the level in the glass did not go to 1/2 or 3/4

Rick :

are both valves (top & bottom) on the glass open?

Customer:

let me check

Rick :

ok

Customer:

the lower valve was closed the upper was open

Rick :

they both need to be open for the glass reading to be accurate.

Customer:

open all the way?

Rick :

I'm not talking about the small pet cock drain at the bottom of some

Rick :

yes wide open

Customer:

you are talking about the valves at each end of the glass, right?

Rick :

yes

Rick :

some have a small drain cock off the bottom (not that one)

Customer:

yes, that drain I use to empty the boiler

Rick :

you drain the boiler from the hose bibb (faucet) at the bottom of the boiler not the small drain cock at the bottom of the glass

Rick :

What happens when you open both valves?

Customer:

nothing, may I should fill it with water?

Rick :

Be aware that a glass thats full of clear water can look empty

Rick :

if the water is clear in the glass the system may be flooded

Rick :

and that's why you have water out the radiator

Customer:

This may be the case, I still have water in the tank

Rick :

you keep saying tank, do you mean the boiler?

Customer:

sorry, boiler

Customer:

should I empty the boiler completely

Rick :

Ok, it makes a difference.

Rick :

Just until you see the water level in the glass. be sure to turn the boiler off first

Customer:

yes, boiler is turn off. let me empty the boiler, may be I will see the level, it hard to see it,

Rick :

All you can do is try to get the water to the right level (1/2 to 2/3"s of the glass). If the spitting radiator is because of a clogged return you'll have to call a plumber

Customer:

I use a light to better see the level. It is all the way up, about 80 percent filled

Rick :

is the water dirty?

Customer:

ok, if this does not work I will call the plumber

Customer:

no water is not dirty, that why I could not see the level clearly

Rick :

ok, then if draining doesn't work you'll have to call a plumber

Rick :

Also check to be sure the valve at the base of the radiator is wide open

Customer:

ok. I see the level now went down.

Rick :

do you have any more questions?

Customer:

no thank you

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