Water pressure · Greeley, CO
Low water pressure in Greeley, CO: find where the problem is
Low water pressure in a Greeley, CO home, whether weak flow at the shower or a trickle at the kitchen tap, has a cause, and the cause is rarely the same in every house. Pressure that is too high is a problem too. This page helps you sort a one-fixture problem from a whole-house one, and points to the pipe, valve or line behind it. Call now to connect with a local plumber for help with water pressure problems in Greeley.
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Water pressureOne fixture or the whole house
Start here
Low water pressure: one fixture, or the whole house?
Answer three questions in order. You need a few minutes and your own taps.
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Is it one fixture, or more than one?
Just oneThe cause is at that fixture: a clogged aerator or shower head, a partly closed stop under the sink, or a worn part inside the faucet.
More than oneGo on to question 2.
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Is it hot, cold, or both?
Hot onlyThe cause is on the hot side, such as the water heater or its valve.
Both, or cold onlyGo on to question 3. It points beyond the fixtures.
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Did it drop suddenly, or fade over time?
SuddenlyThink of a valve that was moved, a failed pressure regulator, a leak, or a problem on the line.
SlowlyThink of corroding pipe that narrows, or buildup. A plumber looks at the pipe.
Check the main shutoff first. A valve that is only partly open cuts flow to the whole house, and it is quick to check. How to shut off the water to your house shows where it is.
Causes
What can cut the pressure, from simple to larger
The list runs from the cheapest thing to check to the biggest job. Low pressure is a symptom, and the page it points to depends on the cause.
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Clogged aerator or shower headOne fixture
Grit and mineral buildup can clog the small screens at the end of a faucet or shower head. North Dakota State University Extension says hardness leaves a whitish buildup on faucet and shower-head ends. Fixture repair is covered on faucet and shower repair.
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A partly closed valveFixture or house
A fixture stop or the main shutoff that is not fully open restricts flow.
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The pressure regulatorWhole house
A pressure-reducing valve, or PRV, can wear out and let pressure run low, high or uneven. See below.
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Old or corroded pipeWhole house
Steel pipe can narrow from the inside as it corrodes, so flow drops at many fixtures. Whole-house repiping
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A leakWhole house
Water escaping before it reaches the taps lowers what arrives. Leak detection
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The water service lineOutside
The line from the property line into the house is the customer's, which may include the curb stop and water meter. A damaged line can cut flow. Water service line replacement
Pressure low or too high at the whole house? Call now to connect with a local plumber for help with water pressure problems in Greeley.
Call (970) 633-4799Measuring it
The pressure gauge test
A plumber, or you, can screw a household pressure gauge onto an outdoor hose faucet or a laundry connection. The needle shows the pressure in the house, and watching it while water runs elsewhere shows whether it holds.
This page gives no numbers. What counts as too low or too high depends on the fixtures and on code, so bring the reading to a plumber and ask what it means for your house.
Too high
Pressure that is too high
High pressure is harder to notice than low, because nothing looks wrong at first.
Signs people link to it
- Banging pipes when a tap or appliance shuts off, known as water hammer
- Faucets and toilet fill valves that wear out or drip
- A spray from taps that feels harsh
What a plumber may check
- The PRV, and whether it is working
- Whether heated water has nowhere to go, known as thermal expansion, so an expansion tank may be discussed
- Water hammer devices, for banging pipes
Whether a given pressure is harmful depends on the number, and this page gives none. A plumber can read a gauge and say.
The regulator
What a pressure-reducing valve does
A PRV sits on the supply line near where water enters the house, in houses that have one. It takes the pressure coming in and lowers it to a steadier level for the pipes and fixtures.
When one fails, pressure can climb, fall or swing from one minute to the next. Replacing a PRV is plumber's work: it sits on the main supply, and the water has to be shut off while it is swapped.
Is it the city?
When the cause may be outside your property
If neighbors have the same trouble, or it began after work on the street, the cause may be on the city's side of the line. The City of Greeley owns the main to the property line.
This page makes no claim about water pressure in Greeley. To ask, contact the City of Greeley Water and Sewer department, a city department.
Tell the plumber
- Which fixtures are affected, and whether it is hot, cold or both
- Whether it came on suddenly or slowly
- Whether the main shutoff is fully open
- Any gauge reading you took
- Recent plumbing work, or work on the street
FAQ
Low water pressure in Greeley: common questions
Why is the water pressure low in my whole house?
Common causes are a main shutoff that is only partly open, a failing pressure regulator, corroded pipe, a leak, or a problem on the water service line. The quick test above helps sort which one. A plumber confirms it.
Why is it low at only one faucet?
Usually the problem is at that fixture: a clogged aerator or shower head, a partly closed stop valve, or a worn part inside. Cleaning an aerator is the simplest thing to check.
What is a PRV, and can it fail?
A pressure-reducing valve lowers the pressure coming into the house to a steadier level. It can wear out, and when it does, pressure can run low, high or uneven. Replacing it is a plumber's job.
Is high water pressure harmful?
It can wear on fixtures and pipes, and it can make pipes bang. Whether a given pressure is a problem depends on the number, and this page gives none. A plumber can measure it with a gauge.
Is low pressure the city's problem?
It can be. The City of Greeley owns the main to the property line, and the customer owns the line from there into the house. If neighbors share the problem, ask the city's Water and Sewer department.
How is a pressure problem evaluated on site?
A plumber checks the pressure with a gauge, compares one fixture against the whole house, and looks at the shutoff valves, any pressure-reducing valve and the lines behind the weak flow, then explains the cause.
Call about the water pressure
Say which fixtures are affected, whether it is hot or cold, and when it started.
Reviewed October 2026