Dielectric Union Leaking

3 slide the union nut onto the 3 4 inch copper pipe that you are going to connect to the heater with its threads.

Dielectric union leaking. If so it has a rubber washer inside and may be leaking because the washer is cracked or worn. I decided on the d. One example of a gasketed union is a thread by thread dielectric union used on gas systems. 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.

Screw on the galvanized half of the dielectric union and tighten it using a wrench. When i started it was code to install dielectric unions everywhere in houses where copper connects to steel. You have lived a very sheltered life my friend. 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.

Pennstate university s experts have noted dielectric union fittings may be leak prone. If the union is joining copper and galvanized steel pipes it should be a dielectric union. Hello tomorrow will be day 2 in my venture to change out a water heater. In addition all flanged unions used on larger pipe sizes are gasketed.

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. Leak at dielectric union. I have never seen a gasketed union.