Dielectric Union Leaking

You have lived a very sheltered life my friend.
Dielectric union leaking. Hello tomorrow will be day 2 in my venture to change out a water heater. Their experience is that simply tightening th union fitting is not a durable repair. I am a licensed plumber for 20 plus years. I decided on the d.
When i started it was code to install dielectric unions everywhere in houses where copper connects to steel. Leak at dielectric union. 3 slide the union nut onto the 3 4 inch copper pipe that you are going to connect to the heater with its threads. Pennstate university s experts have noted dielectric union fittings may be leak prone.
In addition all flanged unions used on larger pipe sizes are gasketed. I have never seen a gasketed union. The psu plant engineering services department recommends replacement of a dielectric union with a dielectric nipple shown below. 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. One example of a gasketed union is a thread by thread dielectric union used on gas systems. If the union is joining copper and galvanized steel pipes it should be a dielectric union. Under no circumstances will proclaimliberty2000 be responsible or liable in any way for any content including but not limited to any errors or.