Recently paid to do maintenance on the bolier and notice the drain area continues to drip out water water overfilling the white pan fairly quickly. Before two pipes were dripping, now the long pipe no longer drips but drain valve continues to drip water. Called the heating professional he suggest that it is normal to have some water coming out the drain pipe and it is very common for boiler. He recommend buying a brass cap with washer to put on it. Does that sound reasonable? Do we need to replace the drain valve? Thanks.
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