I need to replace my anode rod in my Whirlpool 40 Gal Gas water heater. How do I know the length and material composition? Thanks

 

Do you have a water softener? Do you sometimes notice a bad smell from your hot water?

First find out if you have one or two rods. If you have two replace them both with the same type rod. You don't want to mix types.

As for length that depends on your heater. Obviously a tall tank can use a longer rod than a short tank. You need a rod that will fit in the tank without hitting the bottom.

There are also articulated or segmented rods you might consider if you have limited access to your heater. The segmented rods don't need as much overhead clearance to insert them into the tank.

 

duke -

If you have the model number from the I.D. plate, just Google for the manual. That will give the information on the anodes (part numbers, etc.) to help in shopping.

Dick

 

How old is the heater?

Is the anode bad?

Some like to remove the aluminum type and install magnesium..

Well or city water?

Read here..All about anodes.....
( Sometimes best not to touch an older heater...)

Hot water heater anodes and rust protection

 

Yes, city, 5 yrs. Thank you for the feed. I will probably use the mag rod as a replacement.

 

I have the manual, does not give part number or length required. It is probably 42" or 44". But which one.
I had a plumbing inspection in my home and he took out the rod, needs replacing. His price was $180. WOW

 

The rods are like 35 bucks...

Put in the longest rod you can fit IMO.. If its too long cut it down with a hack saw.. How tall is the heater?

Is the anode in the nipple or a separate port?