1. 

   Comment by rangedog
   November 21, 2009 @ 3:41 pm

   At that age, you are best to let it be.
   Besides, most of what is in there is caked by now, and very little would flush out.

2. 

   Comment by Corky R
   November 21, 2009 @ 6:58 pm

   Yes, it’s okay to flush a water heater that old, but if it’s never been done before, it’s an effort in futility. The OE drains on water heaters aren’t designed to allow anything much larger than a BB to come out. In most areas with any lime, calcium content whatsover in the water, it takes about 6 mos. for the sediment to accumulate into chunks larger than that. So at 13 years, you’d probably just be wasting your time.

3. 

   Comment by Eric H
   November 21, 2009 @ 10:23 pm

   Most hot water heaters do not last much longer than 10 years.
   If the drain to flush from is plastic I would let it be. But if it is brass you should be ok. If it drips when you go to shut it back down get a hose bib cap. Good Luck

4. 

   Comment by Moxie
   November 22, 2009 @ 3:54 am

   I am sure it is but why would you want you to? Please check into grants towards a more efficient unit before you go to further expense to maintain something that is much less efficient.

5. 

   Comment by rosco
   November 22, 2009 @ 9:07 am

   Hi, My rule is when it is not broke do not fix it.I would get a fresh money saving one and not worry about what you know is going to happen soon. Good Luck

6. 

   Comment by bugear00
   November 22, 2009 @ 11:19 am

   Yes,,,, I flush mine once a year. You may find quite a bit of calcium build up in th bottom.

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