First: Check Your Pressure Gauge

Before anything else, find your pressure tank (usually in the basement or utility room) and look at the pressure gauge. A healthy well system typically runs between 40–60 PSI, cycling between a cut-in pressure (when the pump turns on) and a cut-out pressure (when it shuts off). Common settings are 30/50 or 40/60.

If the gauge reads normal pressure but you still have low flow at fixtures, the problem is likely downstream — a partially closed valve, a clogged aerator, or a pressure-reducing valve set too low. If the gauge shows low pressure or pressure that drops rapidly when water runs, the problem is in the well system itself.

Cause 1: Waterlogged Pressure Tank

This is the most common cause of pressure problems in Southern Maryland homes. Your pressure tank has a rubber bladder or diaphragm that holds an air charge. When the bladder fails, the tank fills completely with water — there's no air cushion to maintain pressure between pump cycles.

Symptoms: Pressure fluctuates wildly. The pump cycles on and off rapidly (short-cycling). You hear the pump running every few seconds when water is flowing. Pressure drops quickly when you open a faucet.

Fix: Replace the pressure tank. This is a straightforward repair — typically 2–3 hours. A properly sized tank for your home and pump will restore steady pressure and protect your pump from short-cycling damage.

Cause 2: Failing Well Pump

Submersible well pumps have impellers that wear over time, reducing their ability to push water to the surface at adequate pressure. Pumps typically last 10–15 years, though Southern Maryland well water with high iron and sediment can shorten that lifespan.

Symptoms: Pressure is consistently low — not fluctuating, just weak. The pump runs but can't build pressure to the cut-out setting. You may notice the pump running longer than it used to.

Fix: Pull the pump and inspect. Worn impellers can sometimes be replaced, but in most cases a pump that's failing from wear is more cost-effective to replace entirely. We always evaluate the pump, wiring, and well condition before recommending replacement.

Cause 3: Pressure Switch Problems

The pressure switch tells the pump when to turn on and off. If the switch is set too low, corroded, or failing, it may not allow the system to build adequate pressure.

Symptoms: Pump turns on and off at the wrong pressures. Pressure is consistently lower than expected. Pump doesn't turn on when pressure drops.

Fix: Adjust or replace the pressure switch. This is a low-cost repair — but make sure the switch setting matches your pressure tank's pre-charge pressure. Mismatched settings cause short-cycling even with a good tank.

Cause 4: Low Well Yield

Some wells simply don't produce enough water to meet household demand — especially during dry summers when the water table drops. This is called a low-yield or low-production well.

Symptoms: Pressure is fine initially but drops after extended use (shower, laundry, irrigation). The pump runs but pressure falls. Water may sputter or air may come from faucets.

Fix: Options include a constant pressure system (variable speed pump), a storage tank with a booster pump, or in some cases, deepening or replacing the well. We evaluate your well's recovery rate before recommending a solution.

Cause 5: Clogged or Undersized Pipes

In homes with high iron or hard water, scale and iron deposits can build up inside pipes over years — gradually reducing flow. Galvanized steel pipes (common in homes built before 1970) are especially prone to internal corrosion and buildup.

Symptoms: Pressure has declined gradually over years. Flow is reduced at multiple fixtures simultaneously. Older home with galvanized pipes.

Fix: Repiping with copper or PEX, combined with water treatment to prevent future buildup. This is a larger project but often the right long-term solution for older homes.

Cause 6: Clogged Well Screen or Pump Intake

The well screen at the bottom of the well casing prevents sediment from entering the pump. Over time, iron bacteria, mineral deposits, or sediment can clog the screen, restricting water flow to the pump.

Symptoms: Gradual pressure decline. Sediment or discolored water. Pump runs but can't build pressure.

Fix: Pull the pump and inspect the screen. Well rehabilitation (jetting, surging, or chemical treatment) may restore flow. In severe cases, the well may need to be replaced.

When to Call a Plumber

If you're experiencing any of the symptoms above, call Deep Dive Plumbing Maryland at (443) 440-0632. We diagnose well pressure problems with a systematic approach — pressure gauge readings, pump amp draw, tank pre-charge check, and flow testing — before recommending any repair. You'll know exactly what's wrong and what it will cost before we do any work.