Your water heater shouldn't sound like a popcorn machine.

What the popping actually is

Ozarks water is hard: it carries dissolved minerals picked up from the limestone it flows through. Heat water and those minerals fall out of solution, settle to the bottom of the tank, and pack into a layer of sediment. On a gas unit, the burner now sits under a crust. Water gets trapped beneath it, superheats, and the steam pops its way out. That's your popcorn machine: steam escaping through a sediment layer, over and over.

The noise itself won't hurt you. What it tells you is the problem: the burner is heating rock before it heats water, so recovery gets slower and the bill creeps up, and the tank bottom cycles through stress it was never meant to take.

The other noises, quickly

• Rumbling or kettling: same sediment story, further along.
• Screeching or whistling: usually a valve not fully open or a restricted inlet, worth a look.
• Ticking: often just pipes expanding and contracting, and frequently harmless.
• Water sounds plus a wet floor: stop reading, shut off the unit's water supply, and call now. A leaking tank does not recover.

Will a flush fix it?

If the unit is a few years old and the noise is new, usually yes: draining the tank and flushing the sediment out restores quiet and buys efficiency back. Around here, once a year is the honest rhythm, and it's cheap insurance.

The caveat a lot of pages skip: on an old tank that's rumbled for years and never been flushed, that crust can be part of what's holding things together. Disturbing it sometimes reveals a tank that was already done, or a drain valve that clogs mid-flush. Joe will tell you which situation you're in before touching it, because the answer changes what's worth doing.

When replacement is the smarter money

• The unit is past its first decade, especially if it's never been maintained in hard water.
• Rust-tinted hot water, moisture or rust at the tank base, or repairs stacking up.
• The math: a big repair on an old tank often costs a meaningful slice of a new unit that will heat cheaper and carry a fresh warranty.

The sticker on the side of your unit has the age and size. Text a photo of it and Joe will tell you honestly which side of the line you're on: flush it, fix it, or plan the replacement. Details on how we handle both are on the water heater page.