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My vokera linea 7 boiler is loosing water through over flow pipe while heating up to temperature

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The pipe you call over flow. This would be the P/R valve and is set to relieve pressure in system. The first thing that needs to be checked - the expansion tank two types of tanks one would be what is know as a extrol tank, Most likey just hanging off pipe, it has air pressure on one side of rubber dia. and boiler water on other. The 2nd type is just a tank at ceiling height (most of the time). You would see a hose bib off the one end. Tank holds some water but must have air for boiler water to push into as it is heated. If you have the first tank it should be replaced. The 2nd type needs to be drained of all water. Shut off feed line to tank hook up short hose and drain into a bucket. if water stops you must break the vacuum raise hose above tank air should go into tank. repete draining till all water is out of tank. Some tanks have a way to open a valve to let air in as you drain if so use it. When all water is out of tank valve off everything (no air should leave tank) Open back up to system now you should have aplace for the water to expained to.

Posted on Nov 06, 2008

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