Dielectric Union Leaking

Pennstate university s experts have noted dielectric union fittings may be leak prone.

Dielectric union leaking.

I have never seen a gasketed 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. When i started it was code to install dielectric unions everywhere in houses where copper connects to steel. 3 slide the union nut onto the 3 4 inch copper pipe that you are going to connect to the heater with its threads.

Unions rather than 3 4 copper female so as it would be easier to take out if. 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. If the union is joining copper and galvanized steel pipes it should be a dielectric union.

In addition all flanged unions used on larger pipe sizes are gasketed. You have lived a very sheltered life my friend. I am a licensed plumber for 20 plus years. Leak at dielectric union.

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. Hello tomorrow will be day 2 in my venture to change out a water heater.