water heater drain plug
Hi I have a Attwood w/h and wanting to replace it when I get ready for the season. The plastic plug is starting to round off like they normal do, my question I see these at parts stores and they want ...
Forum Discussion
Old-Biscuit wrote:
They use a1/2" nylon plug due to the drain hole threads being aluminum.
Water normal temp is 140*F and if normal t-stat doesn't shut down heating then temp will rise to 180*F before ECO t-stat (hi temp) shuts heating down.
The nylon plug has max temp rating up to 450*F
PVC max temp rating of 140*F but for threaded material it is rated to 110*F
CPVC max temp rating of 200*F but for threaded material it is rated to 150*F
Which plug do you want in your Water Heater?
Another good type is from "ACETAL" that has a temp rating of 180 IIRC and is colored grey and fittings out of that are often found at trailer supply stores I think. That is what I used to attach my WH drain line to the tank and after about 5 to 6 years all is still O.K.
I think some of the special polyethelene plugs are also high temp, but probably a lot harder to find.
Larry
