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How to read a water heater in 30 seconds

Everything you need is printed right on the rating plate — the metal or sticker label on the side of the tank.

• • Age — most manufacturers encode the manufacture date in the serial number, though the exact format varies by brand. If it's not obvious, the manufacturer's website can usually decode it from the serial number.
• • Capacity — the tank size in gallons is printed directly on the label.
• • The T&P valve — short for temperature and pressure relief valve. It's a safety mechanism that releases water automatically if pressure or temperature inside the tank gets dangerously high.
• • The anode rod — a rod inside the tank designed to corrode instead of the tank itself. It's sacrificial by design, and typically needs replacing every few years to keep protecting the tank.
• • Typical lifespan — most tank water heaters last 8–12 years. Past that window, it's reasonable for a buyer to expect replacement sooner rather than later.

A hose bib is the outdoor faucet a garden hose screws onto — simple, easy to overlook, and one of the most common repair calls we get. A few things worth knowing:

• • Frost-free vs. standard — a frost-free hose bib has a long stem that moves the actual shut-off valve back inside the heated wall, so the exposed part outside stays dry between uses. Older homes sometimes still have standard bibs, which sit fully exposed year-round.
• • Leaving a hose attached is the #1 cause of freeze damage — even a frost-free bib can't drain properly if a hose is left screwed on, since the hose traps water inside. That trapped water freezes, expands, and cracks the pipe — often invisibly, until it's used again in spring and leaks inside the wall.
• • The backflow preventer matters — that small cap-like fitting on the spigot stops water (and anything in a hose or pool) from siphoning backward into the home's drinking water if pressure drops. It's a small part with a real job.
• • A slow drip is rarely "just a drip" — it usually means a worn washer or packing nut inside, which is a simple, inexpensive fix if caught early rather than left to corrode the fixture.

Freestanding tubs — how they actually work.

Standing tubs are one of the most requested upgrades in a listing photo, but they're plumbed differently than a standard alcove tub, which matters for anyone touring a home with one:

• • The water supply usually comes up through the floor — since there's no surrounding deck or wall to hide the plumbing in, most freestanding tubs use a floor-mounted filler, which means supply lines have to be routed up through the floor rather than through a wall like a typical tub/shower combo.
• • The drain works differently too — without a deck to hide a trip-lever mechanism, freestanding tubs almost always use a simple lift-and-turn or click-clack style drain stopper built right into the drain itself.
• • Weight is a real consideration — a freestanding tub filled with water (and a person) can weigh several hundred pounds more than people expect, especially cast iron or stone resin models. On an upper floor, that sometimes means the framing underneath needs to be verified before installation.
• • Material changes the maintenance — acrylic is light and affordable but can scratch, cast iron holds heat longest but is heavy, and stone resin looks the most modern but is the heaviest of the three.

Accordion drains — sold at every hardware store, approved by none of them.

That stretchy, ridged plastic tube under a sink is called a corrugated or "accordion" drain connector, and yes, it's sold openly at Home Depot and Lowe's. That doesn't mean it's code compliant — most jurisdictions don't allow it for a permanent installation.

• • Why people use it — it's an easy fix when a new sink's drain doesn't quite line up with the P-trap coming out of the wall. Instead of properly repositioning the trap arm with rigid fittings, it's tempting to just stretch a flexible connector to bridge the gap.
• • Why it's not code — plumbing code requires smooth interior walls on drain pipe so wastewater creates a self-cleaning swirl as it flows. The ridges inside an accordion pipe break up that flow and give hair, grease, and grime somewhere to catch — which is exactly why these clog far more often than rigid pipe.
• • The bigger issue — some installs go a step further and use it to replace the P-trap itself rather than just connect to it. That removes the trap's water seal, which is what blocks sewer gas from coming back up into the home.
• • Why it matters to a buyer — it's one of the clearest signs of unpermitted DIY work under a sink, and it's worth asking what else in the home might have gotten the same treatment.

Moving a shower is a bigger job than it looks.

Relocating a shower to the other side of a bathroom sounds like a tile-and-fixtures job, but the plumbing underneath is usually the real project:

• • The drain has to move, not just the shower — and in most Phoenix-area homes built on a concrete slab, that means cutting into the foundation, rerouting the drain line, then re-pouring the concrete before any tile goes down.
• • Slope is non-negotiable — drain lines need a consistent fall (roughly a quarter inch per foot) to the main line. Moving a drain even a few feet can mean cutting a much longer trench than people expect to keep that slope correct.
• • Venting has to move too — every fixture drain needs a vent so air can get in and waste can flow out without gurgling or siphoning the trap dry. Relocating a shower often means extending the vent pipe as well, sometimes all the way to the roof.
• • This is a permitted job, full stop — a true shower relocation touches both plumbing and slab/structural work, which means inspections at multiple stages. If a home has a "moved" shower or a converted bathroom layout, it's worth confirming the work was actually permitted before assuming it was done right.

Sometimes we have to break a wall to fix a pipe.

A lot of Phoenix homes route drain lines through concrete block walls, and there's no shortcut to reaching one for a repair — the wall has to come open first. It looks dramatic mid-job, but it's standard, necessary access, not a sign anything is more broken than it is.

• • A real example — a laundry drain line that was only 1½ inches. That was a normal size decades ago, but it can't keep up with how fast modern washing machines drain, and current plumbing code now requires a 2-inch minimum standpipe for a clothes washer.
• • Why it matters — an undersized drain on a fast-draining modern washer is a common cause of overflow at the standpipe, especially if the line is already carrying any buildup.
• • We stay in our lane — we handle the plumbing side: opening access, replacing the line to the correct size, testing it, and closing the pipe run back up. For the wall itself — block, stucco, or drywall — we bring in a trusted repair partner so the whole job gets finished right, not just the part underneath.

The main water shutoff valve.

Every home has one valve that controls water to the entire house — and most homeowners couldn't point to it if asked. Worth knowing before there's ever an emergency:

• • There are usually two — one at the water meter near the street (needs a meter key to operate), and a second closer to the house, often near a hose bib or in the garage, meant for everyday use.
• • Old gate valves seize up — older homes often have multi-turn gate valves, which can corrode and seize solid after years of never being touched. When a pipe finally does burst, that's the worst possible moment to discover the valve won't turn.
• • Ball valves are the modern standard — a quarter-turn ball valve is far more reliable long-term and is what we recommend upgrading to any time we're already working near the main line.
• • Test it once or twice a year — turning it fully off and back on periodically keeps it from seizing and confirms it actually works before it's needed in a real emergency.

Water softeners, in plain terms.

Phoenix sits in one of the hardest water markets in the country, which is why softeners are so common here. Here's what one actually does:

• • How it works — a softener runs water through a resin tank that swaps out the calcium and magnesium causing "hardness" for sodium, using salt stored in a separate brine tank to periodically recharge that resin.
• • Why it matters — hard water leaves mineral scale inside pipes, water heaters, and fixtures over time, which shortens their lifespan and reduces flow. Softened water is easier on all of it.
• • It needs upkeep — the brine tank needs salt refills periodically, and the resin bed itself typically lasts 10-15 years before it needs to be replaced.
• • Worth checking at a showing — confirm it's actually plumbed in and functioning, not just sitting there unconnected. A bypass valve stuck in the wrong position means the home isn't getting softened water at all, softener or not.

Garbage disposals — simple, until they're not.

A disposal grinds food waste into small enough particles to flow through the drain — straightforward in theory, but a few things trip people up:

• • Septic systems and disposals don't always mix — sending ground food waste into a septic tank adds solids the system has to break down, and many septic designs discourage or outright prohibit a disposal. Worth checking before assuming every home should have one.
• • Jams are usually a quick fix — most disposals have a small hex hole on the bottom for an Allen wrench, or a reset button, to clear a jam without calling anyone.
• • A classic install mistake — disposals connect to the dishwasher drain through a knockout plug that has to be removed during installation. Forget it, and the dishwasher will never drain properly.
• • What not to put down one — grease, fibrous vegetables like celery, and coffee grounds don't grind cleanly and are a common cause of clogs further down the line, even though the disposal itself seems fine.

Expansion tanks — the small tank most people never notice.

That small tank sitting near a water heater, about the size of a propane canister, has one job: giving heated water somewhere to go.

• • Water expands as it heats — in a home with a check valve or pressure regulator on the main line (very common), that expanding water has nowhere to escape back into the street. Without an expansion tank, that pressure has to go somewhere, and it's usually the water heater tank, valves, and fixtures that absorb the stress.
• • Most current codes require one — whenever a home has a check valve or pressure regulator creating what's called a "closed" system, which describes the majority of homes on municipal water today.
• • A common miss — it's easy for a water heater to get replaced without adding an expansion tank if one wasn't already there, especially on older installs. Signs it might be missing include a T&P valve that drips periodically or noticeably high water pressure throughout the home.