Plumbing Terms, in Plain English

The small mesh screen at the tip of a faucet that mixes air into the stream to save water and reduce splashing. In Central Texas, hard-water scale clogs aerators fast — unscrewing and soaking one in vinegar restores flow on Delta, Moen, and Kohler faucets alike.

A sacrificial metal rod inside a tank water heater that corrodes instead of the steel tank. Central Texas hard water eats anode rods faster, so checking and replacing one on schedule is one of the cheapest ways to extend a water heater's life.

A valve that stops used or contaminated water from reversing direction and re-entering your clean drinking-water supply. Required by code on irrigation systems and certain fixtures to protect the potable water in your home.

A one-way gate installed on a sewer line that lets waste flow out but blocks a surcharged city sewer from backing up into your lowest drains during heavy Central Texas rain. The primary defense for below-grade fixtures.

The salt-holding tank that recharges a water softener's resin during regeneration. Keeping it filled with the right salt is the main maintenance a softener needs to keep removing hardness in hard-water Central Texas.

The internal valve insert that controls water flow and temperature inside a single-handle faucet. A worn or scale-crusted cartridge is the usual cause of a dripping Delta, Moen, or Kohler faucet — an inexpensive, flat-rate repair.

The drain/sewer piping common in Austin homes built before the 1980s. Cast iron corrodes and scales from the inside over decades, which is why many older Central Texas homes eventually need sewer repair or a repipe.

A capped access point on a drain or sewer line that lets a plumber clear a clog or run a camera without cutting into pipe. Accessible cleanouts make drain and sewer service faster and cheaper.

A high-efficiency gas water heater (often tankless, like many Navien units) that extracts extra heat from its own exhaust before venting it, using less fuel. The efficiency that makes condensing tankless attractive also makes annual descaling important in hard water.

Circulating a descaling solution through a tankless water heater (or flushing a tank) to remove the mineral scale Central Texas hard water leaves behind. Annual descaling is essential to keep a tankless unit efficient and long-lived.

A fitting that joins two different metals (typically copper and steel) while electrically separating them so they don't corrode each other. A small detail that a master-plumber-owned crew gets right and a rushed job often skips.

A charge some companies add just to send a technician to your door, separate from any repair. Plumbing Outfitters charges no dispatch fee — you don't pay us simply to show up.

Clearing a blocked or slow drain, from a simple cabled clog to camera-guided diagnosis of a recurring backup. One of the most common residential repairs and part of our published flat-rate Essential Ten pricing.

A pump that lifts wastewater from a below-grade bathroom or laundry up to the sewer main, since gravity can't carry it. Required wherever a fixture sits below the level of the home's main drain line.

The tank component that refills a toilet after each flush and shuts off at the set water level. A worn fill valve is a common cause of a running toilet; replacing it is a quick, flat-rate repair.

How many gallons of hot water a tank water heater can deliver in a busy first hour, combining tank capacity and recovery rate. It's the number to size by — more useful than tank gallons alone — when matching a heater to your household's peak demand.

The rubber seal at the bottom of a toilet tank that lifts to flush and drops to reseal. Central Texas hard water crusts flappers with scale and breaks the seal, which is the most common cause of a running toilet.

Gallons per minute — the measure used to size a tankless water heater. Unlike a tank's gallon capacity, a tankless unit is matched to how many fixtures' combined GPM you need at your incoming water temperature.

Zinc-coated steel supply piping used in many pre-1960s homes. The coating wears away over time, causing internal rust, restricted flow, and discolored water — a frequent driver of repipes in older Central Texas houses.

The standard unit for water hardness. Above about 7 GPG, water is considered hard; much of Central Texas tests well into the hard range thanks to the limestone Edwards Aquifer. GPG sets how a water softener is sized.

A tank that captures fats, oils, and grease from a commercial kitchen's wastewater before they reach the sewer. Required and inspected for food service; an undersized or unmaintained interceptor is the top cause of a restaurant line clog.

Water with a high concentration of dissolved calcium and magnesium. It's the defining water-quality issue across Greater Austin and is what scales water heaters, clouds glass, and shortens fixture life.

A high-efficiency electric water heater that moves heat from the surrounding air rather than generating it directly, using far less energy than a standard electric tank. It's the equipment type that typically qualifies for the Austin Energy and federal efficiency rebates.

The outdoor faucet (spigot) you attach a garden hose to. A common freeze-and-leak point during Central Texas hard freezes; hose-bib replacement is one of our flat-rate Essential Ten repairs.

High-pressure water scouring that clears grease, scale, and root intrusion from drain and sewer lines — a deeper clean than cabling for stubborn or recurring blockages.

The process a traditional water softener uses to swap hardness minerals (calcium and magnesium) for sodium or potassium, producing soft water that protects pipes and appliances.

Pricing that lists each part of a job as a clear, agreed amount before work begins, instead of an open-ended hourly meter. It's the foundation of our transparent, no-surprise quotes.

The highest plumbing license tier in Texas, earned through years of documented experience and state exams. A master plumber can design plumbing systems, pull permits, and supervise licensed crews.

The U-shaped bend under a sink or fixture that holds a small amount of water to block sewer gas from entering your home. A dry or missing P-trap is a common source of drain odor.

Cross-linked polyethylene — flexible plastic supply tubing widely used in modern repipes. It resists scale and freeze damage better than rigid metal and installs with fewer joints.

A tiny corrosion hole in a copper supply line that weeps water, often hidden in a wall or ceiling. Hard-water mineral buildup is a common contributor in Central Texas homes.

A shower/tub valve that keeps water temperature steady when another fixture draws water, preventing scalding spikes. Required by code on new and remodeled showers — a detail a master-plumber install gets right.

A valve that lowers incoming municipal water pressure to a safe range (typically 60–75 psi). Too-high pressure stresses fixtures, joints, and water heaters and is a frequent, fixable cause of leaks.

A pump that keeps hot water moving in a loop so it reaches distant fixtures quickly instead of running cold first. Often paired with tankless units (like Navien) to cut the wait and water waste at far taps.

Replacing a home's aging supply or drain piping — partial or whole-home. Common in older Austin homes with galvanized or corroded cast-iron lines, and best handled by a licensed, master-plumber-led crew.

The licensed master plumber legally responsible for a plumbing company's work and code compliance in Texas. At Plumbing Outfitters that's owner John Warren Stroud — meaning the person accountable for the work also owns the company.

A filtration method that forces water through a fine membrane to remove dissolved solids and contaminants, producing very pure drinking water. Often added at the kitchen tap alongside whole-home softening for the best-tasting water.

A reduced-pressure-zone backflow preventer — a higher-protection backflow device required on many commercial connections and irrigation systems to keep contaminated water out of the public supply. Often subject to periodic testing.

A template-assisted-crystallization system that changes how hardness minerals behave so they stick less — reducing scale adhesion. Important distinction: it does NOT remove hardness like a true ion-exchange softener, so soap still won't lather and tests still read hard.

Mineral grit and scale that settles at the bottom of a tank water heater, especially with hard water. It reduces efficiency and capacity, which is why an annual flush is part of good water-heater maintenance.

Running a waterproof camera down a drain or sewer line to see the cause of a recurring backup — roots, grease, a belly, or a break — before deciding on a repair. The diagnostic step that prevents guesswork on costly sewer work.

A valve that isolates water to a single fixture (an angle stop under a sink or toilet) or the whole home (the main shut-off). Knowing where yours are — and keeping them working — is the difference between a quick fix and a flood.

A water-line leak in or beneath a home's concrete foundation slab. Signs include a spike in your water bill, warm floor spots, or the sound of running water with everything off — catch it early to limit damage.

A pump set in a pit that removes groundwater collecting under or beside a home to prevent flooding. A battery or water-powered backup keeps it running during the power outages that often accompany the storms it's meant for.

A water heater that heats water on demand as it flows through, instead of storing it in a tank — delivering endless hot water and saving space and standby energy. In hard-water Central Texas, tankless units (like Navien) need annual descaling to stay efficient.

The build-out work done to fit a commercial space for a new tenant or use — including plumbing rough-in for restrooms, break rooms, and fixtures, coordinated with the landlord and built to code.

A small tank that absorbs the pressure increase created when water heats and expands in a closed system. Code often requires one with a new water heater to protect the tank and plumbing.

Repairing or relining a damaged sewer or water line without digging a long trench — sparing your yard, driveway, and landscaping. A modern alternative to full excavation for many Central Texas line failures.

The pipe that lets air into the drain system so water flows smoothly and sewer gas escapes above the roof instead of into the home. Improper venting causes slow, gurgling drains and odor — a common shortcut in unpermitted remodels.

Treatment that improves water taste and safety by reducing chlorine, sediment, and other contaminants — from point-of-use drinking filters to whole-home and reverse-osmosis systems.

Whole-home equipment that removes hardness minerals so soft water reaches every fixture. In hard-water Central Texas it protects water heaters, pipes, and fixtures and is the centerpiece of our Halo water-treatment options.

The sealing ring between a toilet base and the floor flange that prevents leaks and sewer gas. A failed wax ring causes a rocking toilet or floor staining; wax-ring replacement is one of our flat-rate Essential Ten repairs.