Waterlogged Well Tank Replacement in Owings, MD

The Problem

A homeowner in Owings, MD (20736) called us about their well pump running constantly — they could hear it cycling on and off every few minutes, even when no water was being used. The water pressure was inconsistent, surging and dropping throughout the day.

They were concerned the pump was failing and expected to need a full pump replacement.

The Diagnosis

We arrived and immediately checked the pressure tank. Tapping the tank confirmed it was completely waterlogged — solid throughout with no hollow sound in the upper portion. The air valve confirmed zero air pressure.

The pressure gauge was cycling rapidly between 20 PSI and 40 PSI — the pump was short-cycling, turning on every 30–45 seconds to maintain pressure because the waterlogged tank had no ability to store pressurized water.

We checked the pump motor — it was still functional, but the short-cycling had been stressing it. The pump had been installed 6 years prior. Given the short-cycling stress, we recommended replacing the pressure tank immediately and monitoring the pump.

The Solution

We replaced the waterlogged 20-gallon pressure tank with a new 30-gallon tank — slightly larger to provide more drawdown capacity and reduce pump cycling frequency.

We set the pre-charge pressure to 28 PSI (2 PSI below the cut-in pressure of 30 PSI) and verified the pressure switch cut-in and cut-out settings were correct.

After installation, we monitored the system for 30 minutes. The pump was cycling normally — running for 2–3 minutes and then off for 5–7 minutes, a healthy cycle pattern.

The Outcome

The pump cycling stopped immediately after the pressure tank replacement. Water pressure is now consistent throughout the home. The pump has been running normally for 16 months since the repair — no pump replacement was needed.

Key Takeaways

• A waterlogged pressure tank is one of the most common well system problems
• Short-cycling from a waterlogged tank will eventually burn out the pump motor
• Pressure tank replacement is far less expensive than pump replacement
• Always check the pressure tank before assuming the pump has failed
• Proper pre-charge pressure setting is critical for correct tank operation