How Well Depth Affects Water Pressure and Pump Selection
Your Well’s Depth Determines More Than You Think
When homeowners think about their well, they rarely think about depth. But well depth is one of the single most important factors in determining which pump your system needs, how much pressure the pump can deliver, how much energy the system uses, and how long the equipment will last. Understanding the relationship between depth and performance helps you make better decisions about your water system.
How Depth Affects Pump Requirements
Every foot of depth that your pump has to push water upward requires additional energy. This is measured in terms of head pressure — the amount of force needed to lift water from the pump to the surface and through your plumbing to the highest fixture in your home.
A shallow well of 25 to 50 feet requires a relatively modest pump to deliver adequate pressure. A deep well of 200 feet or more requires a significantly more powerful pump to overcome the weight of the water column. If a pump is undersized for the well’s depth, it will struggle to deliver adequate pressure, run continuously, and burn out prematurely. If it is oversized, it will cycle too frequently and waste energy.
This is why proper pump sizing is not something to guess at. It requires knowing the exact well depth, the static water level, the drawdown rate, and the household’s peak demand — and matching those numbers to a pump with the right specifications.
Submersible Pumps vs. Jet Pumps: A Depth Decision
The type of pump your system uses is largely determined by well depth. Jet pumps are mounted above ground and use suction to pull water up from the well. They work well for shallow wells—generally under 25 feet for a single-line jet pump and up to about 70 feet for a two-line configuration. Beyond that depth, the physics of suction make jet pumps impractical.
Submersible pumps, on the other hand, are installed deep inside the well and push water upward rather than pulling it. They are effective at virtually any residential well depth and are the standard choice for wells deeper than 25 feet. Submersible pump installations are also more efficient, quieter, and longer-lasting than jet pumps because they don’t have to fight gravity from above ground.
At Witzer Wells, we install Grundfos SQ submersible pumps because they offer an excellent balance of efficiency, durability, and performance for the wells we service in Bucks County—most of which are deep enough to benefit from a submersible system. In addition to pump installation, we also provide expert Water Pressure Tank Installation to ensure your entire water system operates smoothly, maintains consistent pressure, and delivers reliable performance throughout your home.
How Depth Affects Water Pressure at the Faucet
The deeper your well, the more the pump has to work to deliver water at adequate pressure to your fixtures. But depth alone does not determine your water pressure — the pressure tank and pressure switch play equally important roles. A properly sized pump paired with a correctly calibrated pressure tank and switch will deliver consistent pressure regardless of well depth.
Problems arise when these components are mismatched. A pump that is rated for a 100-foot well installed in a 250-foot well cannot deliver the pressure it is rated for. A pressure tank that is too small for the pump’s output will cause the system to cycle excessively. A pressure switch set to the wrong range will cause the pump to turn on and off at inappropriate pressure levels.
This is why professional installation and system balancing matter so much. The pump, tank, and switch need to be selected and calibrated as a coordinated system, not as individual parts.
What Bucks County Homeowners Should Know About Local Well Depths
Well depths in Bucks County vary significantly depending on location and geology. Some areas of Holland, Doylestown, and Warminster have wells in the 100 to 200 foot range, while other areas may have shallower or deeper wells. The depth of your well affects not just your pump selection but also your maintenance needs, your energy costs, and the types of problems you are most likely to encounter.
If you do not know the depth of your well, a professional well inspection can provide this information along with a complete assessment of your system’s performance and condition.
Matching Equipment to Your Well
At Witzer Wells, every installation begins with understanding your specific well. We measure depth, evaluate yield, assess water quality, and calculate your household’s demand before recommending equipment. We then install a Grundfos pump and Well-Rite pressure tank that are sized and calibrated specifically for your well and your home.
This tailored approach is what separates a system that performs reliably for 20 years from one that struggles from day one. Your well is unique, and your equipment should be matched to it.
Ready to Get Started?
Contact Witzer Wells today for a free consultation. Call us at (215) 794-3181 or visit to schedule service.
Frequently Asked Questions
How does well depth impact pump selection
Well depth is one of the most important factors when selecting a pump. Shallow wells under about 25 feet typically use jet pumps, while deeper wells require submersible pumps that can efficiently push water to the surface. Deeper wells need more powerful pumps to maintain proper water pressure.
What is the ideal water pressure for a well system
Most residential well systems operate best at a pressure range of 40 to 60 PSI. This level provides consistent water flow for household use such as showers, faucets, and appliances without overworking the pump system.
How do you choose the right pump size for your well
Choosing the right pump size depends on well depth, water demand, and well yield. Most homes require around 8 to 12 gallons per minute. It is important to match the pump capacity to your well’s production to avoid overworking the system or running out of water.
Why is matching pump size to well depth important
Matching pump size to well depth ensures efficient performance and long system life. A pump that is too small may not deliver enough pressure, while an oversized pump can waste energy and cause excessive cycling, leading to wear and damage over time.