Dielectric Union Leaking

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Dielectric union leaking.

The psu plant engineering services department recommends replacement of a dielectric union with a dielectric nipple shown below. Their experience is that simply tightening th union fitting is not a durable repair. I decided on the d. 3 slide the union nut onto the 3 4 inch copper pipe that you are going to connect to the heater with its threads.

Screw on the galvanized half of the dielectric union and tighten it using a wrench. Unions rather than 3 4 copper female so as it would be easier to take out if. I am a licensed plumber for 20 plus years. When i started it was code to install dielectric unions everywhere in houses where copper connects to steel.

If the union is joining copper and galvanized steel pipes it should be a dielectric union. I have never seen a gasketed union. Every single union fails miserably by either leaking clogging up completely rusting to pieces with no water contact outside pipe or depositing rust in water. If so it has a rubber washer inside and may be leaking because the washer is cracked or worn.

Pennstate university s experts have noted dielectric union fittings may be leak prone. Leak at dielectric union. Things earlier today were going just peachy put in a full port ball valve sweated the joints and tightened down the nut on the dielectric unions. You have lived a very sheltered life my friend.