By code it has the pan already with a drain tube routing it to run out the front of the garage door. The "blow off" (if that's the right word) is plumbed to the outside. No damage at all here other then the case of oil I had getting a wet box. Just not the best time for the expenses and I've never done one. I guess it's time to learn LOL.We use A.O. Smith. One from a plumbing supply house may be a little better than a box store. Brass drain vs. plastic.
If you ever run out of HW, get a 50 gallon. If you have room. Not much more $.
Most are putting in a thermal expansion tank also.
Easy to throw a pan under while doing it. Either pipe it to floor drain or cap pan and add a water alarm.
Well since you're experienced I'll see you around 7 AM tomorrow LOL.Wow...I just replaced ours 2 days ago. It decided to spew during that big storm we had. It always happens when you're away or at night or the night before vacation. We just bought a $600 gas one from Home Depot. The last one was a Rheem and it lasted 9 years.