RICHMOND GUIDE
Low water pressure in a Richmond house
One weak faucet is often a screen. Every cold faucet at once is a different conversation.
One fixture, or the whole house
Pressure complaints get expensive when every faucet is replaced to cure a clogged screen. Unscrew the aerator, rinse it, and put it back. Do the same with a showerhead that you can remove without a fight. If that one fixture recovers, stop. If the tub, the lavatory, and the kitchen are all weak, you are past a screen.
Write the pattern. Cold only, hot only, or both. Upstairs only, or the whole house. Sudden, or a fade over years. A sudden drop after someone turned a valve is not the same story as a Fan rowhouse that has been tired at the hall bath for a decade. The second story often belongs with the older supply guide: galvanized steel narrows from the inside.
Rusty water when a tap first opens, then clearer water, fits that narrowing. Chronically weak hot water at one fixture can too. Those clues are a reason to ask for a written plan. They are not a reason to start cutting lines yourself, and they are not a reason to sand a fitting. Leave suspect coatings alone.
Valves that were left half shut
A main that almost closed and then spun can fail to open all the way. The house still has water. It just has less of it. Before you accept a repipe speech, look at the shutoff you or a plumber touched last. The shutoff guide shows how to test a valve without snapping the stem. If the handle was recently exercised, put it fully open and test the fixtures again.
Stops under sinks do the same trick on a smaller scale. A stop that was bumped during a faucet install can leave one lavatory weak while the rest of the bath is fine. Look there before you open a wall. If the stop weeps when you move it, stop moving it. That is how a pressure complaint becomes a leak.
A pressure regulator, where a house has one, can fail in the closed direction. Not every Richmond house has one, and this page will not tell you to adjust a screw you cannot identify. If you see a bell-shaped device on the main and the whole house faded together, mention it. Do not crank it to see what happens. Higher pressure makes a small leak a larger one.
Heaters, scale, and reports
Hot-only weakness can be the heater rather than the street. Sediment, a failed dip tube, or a mixing valve can cut the hot stream while the cold kitchen tap is fine. The heater guide is explicit that Richmond's utility publishes water-quality reports and that this site does not print a hardness figure. If a quote blames scale, ask what they saw in the tank and compare it with the current report, not a forum post.
A heater that is at the end of its life can still be a pressure story and a leak story at once. Rust at the base is not low pressure. Do not let a weak shower talk you into ignoring a wet pan. Name both symptoms. They may be one visit or two. The scope should say.
Electric heaters that short an element sometimes run lukewarm rather than weak. Lukewarm everywhere is a heat problem. A thin stream is a flow problem. Say which one you have. The words change the parts on the truck.
Leaks that steal pressure
A supply leak can drop pressure and raise usage at the same time. If the stream faded and a ceiling stain appeared, treat the stain as the lead fact. The leak page covers the meter test and why you should not open plaster to chase a ring that may have traveled along a joist. In a rowhouse, ask whether the neighbor's ceiling is wet too. A party wall can make their leak look like your pressure.
A running toilet can waste a surprising amount of water without looking dramatic. Dye in the tank, no flush, color in the bowl: the flapper is the thief. Fix that and recheck the meter before you authorize a search for a hidden break. A hidden leak and a bad flapper can exist together. Remove the obvious one first.
Irrigation, where a house has it, can run on a schedule you forgot. A zone that will not shut will mimic a pressure loss and a usage jump. Confirm it is off before you blame the indoor supply. This is more common on some county lots than in a tight city rowhouse. Say which house you have.
What a useful visit looks like
Tell the plumber the pattern in one breath: which fixtures, hot or cold, sudden or slow, and what changed the day it started. Mention any valve that was turned. Mention rust. Mention whether the street seemed affected. That is enough to keep the first hour from being a faucet catalog.
Ask what they will test before they recommend a repipe or a new heater. Aerator, stops, main position, meter movement, and a look at exposed pipe are a reasonable sequence. A quote that skips them and jumps to a whole-house number deserves the questions on the quote page. Access, plaster, and haul-away still change that number even when the diagnosis is right.
If the whole block is weak, call the utility and say so. If only your house changed after a repair, the cause is likely on your side of the meter. Either way, do not open a finished wall because a single shower feels thin. Prove the pattern first. The repair, if you need one, should name the pipe it is actually for.
QUICK ANSWERS
Pressure questions
Why is only one faucet weak?
Start with the aerator or showerhead screen. Mineral grit and debris collect there. If rinsing the screen restores the stream, the house supply was not the problem. If every fixture on that line is weak, the screen was a distraction.
What if hot water is weak and cold is fine?
That pattern points at the hot side: a failing heater dip tube, a clogged hot line, or old galvanized pipe that has narrowed. It is not a reason to replace every faucet. Read the heater notes before you assume the tank must go.
Can a half-closed main cause this?
Yes. A gate valve that was turned and not opened fully will starve the house. Check the main before you buy fixtures, especially if the change started after a repair or a shutoff test.
Is rusty water the same as low pressure?
They often travel together on galvanized supply. Rust when a tap first opens, plus pressure that fades as a second faucet opens, is a reason to ask for a written plan. It is not a reason to scrape the pipe yourself.
Could the whole block be affected?
If neighbors on the same main lost pressure at the same time, call the utility before you open walls. If only your house changed, the cause is more likely on your side of the meter.
Sources (checked October 6, 2026)
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