Rusty water heater woes - repair or replace?

Just wish they were a bit slimmer; had to measure twice before realizing it wouldn’t fit where my old tank was. If you’ve got a tight utility room, double-check those specs before pulling the trigger.

Definitely agree on double-checking the dimensions - ran into a similar issue during an install at my uncle’s place. Also, if you’re swapping out an old rusty tank, remember to turn off power and water first. Safety first, even if it slows you down a bit.

Yeah, those new tanks can be real chunky compared to the old ones. Had a job last month where I had to take the door off its hinges just to squeeze the thing in. Always worth triple-checking, especially in those older houses with tight corners. Good call on the safety steps too - seen too many folks skip that and regret it later.

Always worth triple-checking, especially in those older houses with tight corners.

I get where you’re coming from, but honestly, I’ve found it’s not always about the size of the tank. Sometimes it’s the layout - old basements with weird steps or low ceilings can be a bigger headache than the doorways. Had one place where the tank fit fine through the door, but we had to tilt it at this wild angle to clear a support beam. Nearly lost my back on that one. As for safety, yeah, can’t argue there, but I’ve seen folks go overboard and end up making things more complicated than they need to be. Sometimes a little improvisation gets the job done, as long as you’re careful.

Yeah, I hear you about improvising, but I’ve seen too many accidents when folks try to “just make it work.” Ever had to deal with a tank that started leaking mid-move? Curious if anyone’s tried breaking down a wall temporarily for access instead of forcing it.

Breaking down a wall just to get a tank out sounds like a headache unless you’re already planning some demo work. I’ve seen folks try to muscle a heater through a tight spot and end up with a busted pipe or worse, a gash in the drywall that’s gotta get fixed anyway. Honestly, if the tank’s that old and rusty, I’d lean toward replacement, but I’d rather cut a section of drywall clean and patch it later than risk a leak mid-move. Way less mess in the long run.

Cutting drywall is definitely the lesser evil compared to wrestling a rusty tank through a tight squeeze. I’ve seen folks try to “just squeeze it by” and end up with a pinhole leak in a copper line - water everywhere, and suddenly you’re not just replacing a heater but drying out your basement too. Have you checked if there’s any flex in the pipes or if they’re rigid all the way? Sometimes a little give makes removal way easier, but if everything’s locked in, I’d rather patch some drywall than risk a plumbing nightmare.

Man, you nailed it - nothing like a “quick squeeze” turning into a full-blown indoor pool situation. I once watched my uncle try to muscle a tank out without cutting anything, and he ended up with a geyser from a copper elbow. Drywall’s way less dramatic to fix than soggy carpet, trust me.

That “geyser from a copper elbow” visual is too real - I’ve been there, except it was my own kitchen and I learned the hard way that towels are no match for a pressurized leak. If you’re seeing rust, honestly, I’d lean toward replacing the tank. Even if you patch it up, you’re just buying time until the next indoor waterfall. Plus, newer models are way more energy-efficient, which is good for your wallet and the planet. Drywall’s a breeze compared to moldy insulation - trust me, I still have nightmares about that cleanup.

Yep, once you see rust, that tank’s on borrowed time. Patching might hold for a bit, but the risk just isn’t worth it - especially if you’ve ever had to rip out soggy drywall or, worse, deal with that musty smell from wet insulation. I’ve swapped out more water heaters than I can count, and the newer units really do save a chunk on the energy bill. Only exception I’d make is if it’s a super minor surface spot and the tank’s pretty new... but that’s rare.

Patching might hold for a bit, but the risk just isn’t worth it - especially if you’ve ever had to rip out soggy drywall or, worse, deal with that musty smell from wet insulation.

Man, I hear you on the musty smell. Had a tenant once who tried to “just keep an eye on it” after spotting rust. Two weeks later, I’m knee-deep in water and ruined carpet. Lesson learned: tanks don’t give second chances.

tanks don’t give second chances.

That’s the truth. I get wanting to stretch things out, but once rust shows up, it’s usually game over for the tank. Here’s my two cents:

1. Check if the rust is just on fittings or actually on the tank itself. Fittings can sometimes be swapped, but tank rust means it’s time to move on.
2. If you’re replacing, look into high-efficiency or heat pump models - they use less energy and last longer.
3. Don’t forget to recycle the old one. Most scrap yards will take them.

Trying to patch a rusty tank is like taping up a leaky garden hose...it’ll just come back to bite you.

Trying to patch a rusty tank is like taping up a leaky garden hose...it’ll just come back to bite you.

Maybe I’m just stubborn, but I’ve actually seen a few “patched” tanks limp along for another year or two. Not saying it’s ideal, but if the rust is minor and you’re in a pinch, there are some epoxy kits that can buy you time. Just depends how desperate you are to avoid a cold shower. Anyone else ever try the “band-aid” route before giving up?

I’ve done the “band-aid” fix on a water heater before - used a two-part epoxy putty and some sandpaper. It actually held for about eight months, which was longer than I expected, but I was checking for leaks every week like a paranoid raccoon. Honestly, if the rust is just surface-level and you’re not ready to shell out for a new tank, it’s worth a shot. Just don’t get too comfy... once the rust gets through, it’s game over.

Honestly, I’ve seen that epoxy trick work in a pinch, but it’s always a gamble. Here’s how I’d break it down:

- If you’re seeing rust on the outside, there’s a good chance it’s worse inside. Water heaters rust from the inside out, so by the time you spot it, the tank’s probably already on borrowed time.
- Epoxy and sandpaper can buy you a few months, maybe a year if you’re lucky. But you’ll be living with that “is today the day it bursts?” feeling. Not fun, especially if you’re not home when it finally gives out.
- If you’re tight on cash or waiting for a sale, I get the temptation to patch it. Just keep a close eye on it, like you said. Maybe put a pan underneath if you haven’t already, just in case.
- If you’ve got any signs of leaking around the base, or if the rust is more than just a little surface spot, I’d lean toward replacing. Once the tank wall is compromised, it’s just a matter of time before you’ve got a mess on your hands.

I’ve seen folks try to stretch it out and end up with water damage that costs way more than a new heater would’ve. If you’re handy, swapping out a tank isn’t the worst DIY job, but yeah, it’s a chunk of change upfront.

One thing I’d add - if you do replace, check the anode rod every couple years. That’s what’s supposed to take the hit from corrosion, not the tank itself. Most people never touch it and wonder why their heater rusts out early.

Anyway, patching works for a bit, but I wouldn’t get too comfortable. If you start seeing rust flakes in your hot water or the patch starts weeping, it’s time to bite the bullet.

If you’re seeing rust on the outside, there’s a good chance it’s worse inside.

That’s been my experience too - by the time you notice rust, you’re already on borrowed time. Curious, have you ever actually had a patched tank last more than a year? I’ve never seen one make it that long.

I hear you - patching a rusty tank feels like putting a band-aid on a sinking ship. I’ve tried the epoxy trick and even those “miracle” sealants people swear by, but honestly, I’ve never had any of them last much past six months. Maybe if the rust is super minor and you catch it early, but once it’s visible on the outside, it’s usually just a matter of time before you’re dealing with leaks or worse.

One time, I tried to stretch a tank through the winter with a patch job, thinking I’d replace it in the spring. Ended up with a flooded basement in February. Not fun. Sometimes it feels tempting to save the cash upfront, but in my experience, it’s usually cheaper (and way less hassle) to just bite the bullet and swap it out when you first spot rust. Curious if anyone’s actually had better luck, but for me, it’s almost always a losing battle once rust shows up.

Honestly, you nailed it - once rust shows up on the outside, that tank’s living on borrowed time. I’ve seen folks try every patch in the book, but like you said, it’s usually just delaying the inevitable. Sometimes saving a few bucks now means way more headaches down the road... especially if you end up mopping up a flooded basement in February. Been there myself, and it’s a lesson I don’t care to repeat. Replacing early might sting at first, but it’s almost always the smarter move.

Couldn’t agree more with the “borrowed time” bit. I’ve been called out to swap tanks where folks tried every sealant and patch kit under the sun - sometimes even duct tape, believe it or not. Once that rust is showing on the outside, it’s usually a sign things are worse on the inside. Had a job last winter where a guy tried to limp his old heater along through the season... ended up with a split seam and water everywhere at 2am. Not fun.

I get wanting to stretch every dollar, but in my experience, those “temporary” fixes almost always end up costing more - either in water damage, emergency calls, or just plain hassle. If you’re seeing rust, especially near the bottom of the tank or around fittings, replacement’s usually the safest bet. Nobody likes shelling out for a new heater before they’re ready, but it beats waking up to an unexpected indoor pool.

I get where you’re coming from, but I’ve seen a few cases where a bit of rust on the outside didn’t mean the tank was totally shot. Sometimes it’s just surface rust from condensation or a leaky fitting above. If the rust is minor and the tank’s not that old, flushing it and replacing the anode rod can buy some time. Not saying it’s a long-term fix, but it’s not always an instant death sentence for the heater either. Just depends how bad it is and where it’s showing up.

That’s a fair point - my old heater had some rust spots near the bottom, and I figured it was toast. Turned out it was just from a slow drip above. Swapped the anode rod, flushed it, and got another three years out of it. Sometimes it’s just cosmetic, not catastrophic. Just gotta keep an eye on it and not panic at the first sign of orange.