Steam radiators bring the power of heated water into your home so you can reap the double advantages of hot water and heat at the same time. However, older single-pipe steam radiators are pretty notorious for springing leaks, which can be a major headache for a homeowner. If you start noticing spots of moisture around your steam radiator, it is time to get out your tools and do a little investigating; you may be able to fix the problem on your own. Here is a look at some of the ways you may be able to fix a small leak in a steam radiator:

A leaking vent valve can usually be replaced. 

Most leaks from a steam radiator will show up around the vent valves that control how much heat is produced. The vent valve is usually located along the side of the radiator, and you can close it completely to prevent heat from escaping or you can open it up to allow more heat in your space. If you are getting drips of water from this valve, it will be the valve itself that needs to be replaced, and this is a job best reserved for a professional since replacing the valve can involve partially disassembling the whole unit. 

Pinhole leaks can be sealed off pretty easily. 

If your steam radiator develops a pinhole leak, the unit will start to drip water. It may not be a lot of water, but it will be enough water to leave wet spots on the floor below the radiator, which can cause significant water damage over time. If you notice a pinhole leak, the good news is these leaks are fairly easy to mend on the fly. Pick up a tube of JB weld or a strong heat-resistant epoxy and cover the hole, sealing it firmly in place with your fingers before it dries. 

Leaking water from cracks can be hugely problematic. 

A crack in your steam radiator means one thing: the pressure inside once grew so immense that it caused a rupture in the unit. This kind of leak is when you will have the most water loss, so your unit should not be operated if it has a crack. For the most part, a cracked steam radiator will mean the main housing of the unit will have to be replaced. Cracks are nearly impossible to seal perfectly, and even if you do, it will likely continue to spread. For more information, contact companies like H.R. Stewart Inc.