Quick diagnostic: when did the pressure drop start?
If the pressure drop is recent (within days or weeks), it is usually mechanical. A failed pressure regulator, a clogged aerator, a partially closed shutoff valve, or a leak somewhere in the system. These are the easier fixes.
If the pressure drop has been gradual over months or years, it is usually buildup. Mineral scale from Florida hard water inside the supply lines, sediment in the water heater (which affects hot pressure specifically), or corroded galvanized pipe in pre-1970 homes. These fixes are bigger.
Knowing which timeline you are on cuts the diagnostic work in half before a plumber even shows up.
Cause 1: Failed pressure regulator (PRV)
Your home should have a pressure-reducing valve where the main water line enters. It steps the municipal supply pressure (60 to 80 PSI from the street in most Orlando neighborhoods) down to a safe house pressure (50 to 60 PSI). PRVs fail over 8 to 15 years, especially in hard-water areas.
A failing PRV usually drops pressure suddenly and across the whole house. Hot and cold both. Sometimes the failure goes the other way (pressure climbs uncontrollably and bursts a water heater relief valve), but more often the failure shows as low pressure everywhere.
Replacement runs $250 to $550 depending on brand and access. The job takes about an hour. The new PRV gets adjusted with a pressure gauge on a hose bib to verify the right output.
Cause 2: Aerators and showerheads clogged with calcium
Florida hard water (calcium and magnesium from the regional aquifer) deposits inside aerators and showerhead nozzles. You will notice the pressure at one specific fixture is bad while the rest of the house is fine.
Unscrew the aerator. Soak it in white vinegar for 30 minutes. Scrub with an old toothbrush. Rinse and reinstall. Same procedure for showerheads, except sometimes the entire head needs replacement if the buildup is severe.
If every fixture is dropping pressure together, this is not the cause. It is something further upstream.
Cause 3: Hot-water-only pressure drop = water heater sediment
If only the hot side has low pressure (cold water at every fixture is fine), the problem is at the water heater. Florida tank water heaters accumulate mineral sediment at the bottom over 8 to 12 years. The sediment partially blocks the hot-water outlet.
Flushing the tank can help if the sediment is recent. Drain the tank, run cold water through it for a few minutes, and refill. If the tank is more than 10 years old, full replacement usually makes more sense than fighting the sediment.
An anode rod check at the same visit is worth doing. A spent anode rod accelerates tank-bottom corrosion and shortens lifespan.
Cause 4: Hidden leak somewhere in the system
A leak you cannot see will gradually reduce pressure as water bypasses the fixtures. Slab leaks (Orlando-specific concern due to slab-on-grade construction) are the worst case. Wall leaks, attic-line leaks, and underground irrigation cross-connections are all possible.
Quick check: turn off every fixture and appliance in the house. Read the water meter, wait 30 minutes, read it again. If it moved, there is a leak somewhere. The next step is acoustic leak detection or thermal imaging to find the exact spot.
A slab leak diagnostic in Orlando runs $250 to $450 for the detection visit. Repair varies from $1,500 to $4,000 depending on whether the slab needs to be broken or whether the line can be re-routed through the attic.
Cause 5: Old galvanized supply pipes (pre-1970 homes)
If your Orlando home was built before 1970, the original supply lines may be galvanized steel. Galvanized pipes rust internally over decades, reducing the working diameter of a 3/4-inch pipe to less than 1/2 inch. Pressure drops gradually, often over years.
There is no good repair for galvanized supply once the buildup is significant. The pipe is corroding from the inside. The fix is a whole-house repipe in PEX or copper.
If you have a pre-1970 Orlando home and the pressure has gotten gradually worse, this is the most likely cause. A camera through the existing line confirms it.
Cause 6: Partially closed main shutoff or meter valve
Sometimes the simplest cause. The main shutoff valve at your house, or the curb valve at the meter, was partially closed by a previous repair and never fully reopened. The whole house gets lower-than-normal pressure as a result.
Walk to your main shutoff. Verify it is fully open (handle parallel to the pipe for a ball valve, fully counterclockwise for a gate valve). If you have a curb valve at the meter, the utility may need to verify it is open all the way. Free fix when it works.
FAQs
Buy a hose bib pressure gauge for $10 to $15 at any hardware store. Screw it onto an exterior hose bib, open the bib, and read the gauge. Normal range is 50 to 60 PSI. Below 40 PSI is low. Above 80 PSI is high enough to risk damage to fixtures and water heaters.
Municipal demand on the water system. Peak demand mornings and evenings (when most households are doing dishes, showers, laundry) can drop the supply-side pressure noticeably. This is normal. If the drop is 10 PSI or less, no action needed. If it's larger, the cause may be at your home rather than the utility.
Sometimes. If the pressure drop is caused by mineral scale buildup in your fixtures and supply lines, a softener prevents further accumulation but does not reverse what is already there. Replacing already-clogged aerators and showerheads, then adding a softener, is the typical sequence.
No, Orlando's municipal supply is normal for Florida — typically 55 to 75 PSI at the street, depending on elevation. Lake Mary and Lake Nona can run slightly higher due to topography. Pressure problems inside Orlando homes are almost always something at the house, not at the utility.
Yes. The most serious cause is a slab leak or a hidden pipe failure inside walls. If your pressure dropped suddenly and you cannot find an obvious cause, get a leak detection done before the damage gets larger. The earlier slab leaks are found, the cheaper the repair.
Bottom line
Most Greater Orlando plumbing problems have a typical cause and a typical fix. The right diagnosis up front saves money on the back end. If anything in this post matches what you are dealing with, a phone call with a licensed local plumber is the fastest path from question to answer. The phone quote is free, and we tell you straight whether your situation needs same-day attention, next-business-day service, or something you can handle yourself with a few minutes of work.
We work all of Greater Orlando across Orange, Seminole, Volusia, Lake, Osceola, and Polk counties. Same-day response for most calls. Around-the-clock dispatch for emergencies. Florida-licensed plumbers, permit-pulled work, firm prices before any work starts. Call (407) 964-8940 to talk to someone now.
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