Forum Discussion

normanthegr8's avatar
normanthegr8
Explorer II
Jul 01, 2025

Clean the water heater or sanitize the fresh water tank first?

I have to flush out and clean the hot water heater (vinegar)  and sanitize my fresh water tank and water lines (Bleach) on the 2017 Wolf Pup I just bought, which should I do first ?

previous owner didn't really  do a good dewinterise in April . The water stinks .

 

Also can anyone tell me what size th water tank drain cap is ,I'd  like  to  put a shut off valve on that during this flushing process 

 

 

6 Replies

  • do the hot water tank first, the flush it out good, then do the bleach.  I am not a fan of bleach anymore but lots of people use it so do it last after everything is clean, then flush the heck out of it after to get rid of the "bleach"   most rv drain lines are 1/2" pex, but there could always be an exception.  

  • Well if the water lines are standard red and blue PEX lines it is probably a half inch line. Aside from that we're all just guessing. 

    I would personally clean first and then sanitize. 

  • Doesn’t matter since you’re going to flush with clear water again after sanitizing, correct?

    You might be the best to determine what size valve you have since you can see the line. My telepathy isn’t that strong. Barring your ability to measure the line or cap, you could take the cap to the store and match it up. 

    • normanthegr8's avatar
      normanthegr8
      Explorer II

      Thank You, I was just hoping someone knew off hand with my back the less time on my knees under the RV the better 😁