A faucet that drips once per second wastes more than 3,000 gallons of water per year. In Arizona, where water conservation is a genuine concern and water rates continue to climb, a leaky faucet isn’t just an annoyance, it’s money draining down your drain every day it goes unrepaired.
At Penguin Air, Plumbing & Electrical, our licensed plumbers repair leaky faucets throughout the Greater Phoenix area. Here’s what causes faucet leaks, what the different types of faucets require for repair, and when it makes sense to call a professional.
Why Faucets Leak: The Most Common Causes
Faucets leak for different reasons depending on their type, but the underlying causes are usually:
- Worn O-rings: O-rings are small rubber seals that prevent water from escaping around the faucet’s moving parts. Over time they compress, crack, or harden, especially in Phoenix’s hot water environment. A worn O-ring is the most common cause of leaking near the base of a faucet or spout.
- Deteriorated seat washers: In compression faucets (the kind with separate hot and cold handles that you tighten to shut off), a rubber washer presses against a metal seat to stop water flow. Friction wears these washers down over time, causing dripping when the faucet is closed.
- Ceramic disc damage: Modern single-handle faucets typically use a ceramic disc cartridge. These are highly durable but can be cracked by hard water mineral deposits, grit, or physical damage.
- Corroded valve seat: The valve seat connects the faucet to the spout. Sediment accumulation, common with Phoenix’s hard water, can corrode the seat and cause leaking around the spout.
- Loose packing nut: On some faucet types, a packing nut seals the stem. Over time it can loosen, causing leaking near the handle.
Hard Water and Faucet Leaks in Phoenix
Phoenix is well known for its hard water, high levels of calcium and magnesium that leave scale deposits on faucets, shower heads, and internal cartridges. This mineral buildup accelerates wear on seals, cartridges, and valve seats, causing Phoenix faucets to develop leaks faster than in regions with softer water.
If you find yourself repairing faucets repeatedly, a whole-home water softener can significantly reduce mineral buildup throughout your plumbing system, extending the life of faucets, fixtures, and appliances.
The Real Cost of Ignoring a Dripping Faucet
A single faucet dripping at one drop per second wastes approximately 3,000 gallons annually, costing $15-$30 per year in water charges in Phoenix. That may sound small, but most households with a leak have more than one, and faster drips (or running toilets) waste far more. The EPA estimates that household leaks account for more than 1 trillion gallons of wasted water nationally each year.
Beyond water waste, ignoring a faucet leak allows the underlying cause, worn seals, corroded seats, to worsen. What starts as a $50–$100 seal replacement can eventually become a $200–$400 faucet replacement if the internal components corrode beyond repair—costs that can vary depending on faucet type and labor.
DIY vs. Calling a Plumber
Some faucet repairs are appropriate for a confident DIYer with basic tools. Replacing an O-ring or a seat washer in a compression faucet is relatively straightforward if you can identify the faucet type and source the correct parts. Cartridge replacements in modern single-handle faucets are similarly manageable with a repair kit from a hardware store.
Call a licensed plumber when:
- You can’t identify the faucet brand or model to source the right parts
- The leak is at the base of the faucet, indicating a more involved repair
- The valve seat is corroded or damaged and needs replacement
- Shutting off water to that fixture requires closing the main supply
- The faucet is more than 15-20 years old and multiple components are worn
For leaky faucet repair throughout Greater Phoenix, call Penguin Air, Plumbing & Electrical at (480) 525-5400. Our licensed plumbers carry common faucet repair parts and can resolve most leaks in a single visit.
Frequently Asked Questions
Is a dripping faucet a plumbing emergency?
A slow drip is not typically an emergency, but it should be repaired within a few days. A faucet that won’t shut off at all, that is spraying water, or that has developed a leak at the supply line connection is an emergency that requires immediate attention.
How much does faucet repair cost in Phoenix?
Simple seal and cartridge replacements typically cost $100-$200 for parts and labor in Phoenix. Faucet replacement (when repair isn’t cost-effective) generally runs $200-$400 depending on the faucet type and installation complexity. Contact Penguin Air, Plumbing & Electrical for an upfront estimate.
Can a leaky faucet cause water damage?
A slow drip from the spout drains into the sink and is unlikely to cause damage. However, a leak at the base, at the supply line connections under the sink, or behind a wall can cause significant water damage over time, including mold growth in cabinets. If you see water staining or warping in the cabinet under a sink, call a plumber to inspect for hidden leaks.
Why does my faucet drip only when hot water is on?
If the leak only occurs with hot water, the seat washer or O-ring on the hot side has worn out. In a compression faucet, this is the component on the hot water valve stem specifically. In a single-handle faucet, the cartridge controls both temperatures, but the seal wear pattern may be causing leaking only under hot-side pressure conditions.
About Penguin Air, Plumbing & Electrical
Penguin Air, Plumbing & Electrical has been serving Greater Phoenix homeowners with trusted HVAC, plumbing, and electrical services since 2011. Founded by Wade Rusk and William Hallett, Penguin is locally owned and operated, available 24 hours a day, seven days a week. Our licensed, background-checked technicians serve Phoenix, Mesa, Scottsdale, Chandler, Gilbert, Tempe, Glendale, and communities throughout the Phoenix Valley.
Call Penguin Air at (480) 525-5400 to schedule service today.