The gas water heater tank I replaced is >15-20 years old. The Brand
New Water heater I bought doesn't have instructions. Do I need to put
a washer/gasket where the iron nipples/ short iron pips come out the
top of the tank and meet the corrugated Copper pipe?
It is was too corroded to tell if one was there in the past or not.
Most any advice greatly appreciated.
Of note, the short iron pipes are already connected to the water
heater and they have some kind of "Dielectric??" plastic protector on
it. Will this make a washer unnecessary?
replace the flexible hot and cold connectors with new ones. just use
teflon tape for leaks as usual. a dielectric union is used when copper
meets galvanized to avoid corrosion at that point.
and "4. Wrap the threads of the heat trap fittings with pipe-wrap tape,
and screw the fittings into the water heater (blue into the cold-water
inlet, red into the hot-water outlet). Be sure the arrows marked on the
fittings point in the direction of water flow.
5. Install new flexible connectors on the water inlet and outlet pipes.
If there is no shutoff valve on the cold-water side, install one before
connecting the water heater. After all connections are complete, open
the shutoff valve to fill the tank. While it is filling, open several
hot-water faucets in the house to bleed off air in the pipes."
story and photos at:
and excellent info about troubleshooting hot water tanks at:
DO NOT sweat solder copper pipe to fittings with connector screwed on
tank, you will ruin the dip tube and probably will have a poor
sweat the fittings to at least 6 inches of pipe, cool, screw on tank
after cutting and use connector.
In canada (who cares about the rest of the world, we are taking over) you
must install a new dielectric union at each and ever point where iron or
galvanized meets copper.
/brass. Not required at pex connections.
Thank you and the others who answered my questions.
I did use Teflon and no gasket. I think the dielectric device served
I used soapy water to test for gas leaks and didn't see any bubbles
though I did get a whiff of gas ( this was true of the old tank as
How big would the bubbles be - noticeable right?/
On 12 Feb. 2006 00:54:03 -0800, "buffalo bill"
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