How to Prime a Myers Water Pump Correctly

Water pressure vanished first.

Then the kitchen faucet coughed air.

Then the pump started that ugly dry whine every well owner remembers.

Here’s the part most people don’t realize until they’re standing in a mud room with no water: a pump that “needs priming” often has a different problem underneath it, and ignoring that hidden cause is how a simple Saturday repair turns into a $1,200 to $2,500 emergency replacement. That’s the expensive question we’re going to answer before this is over.

A few months ago, Elena Broussard, a 41-year-old school bus mechanic outside Opelousas, Louisiana, called me after her 92-foot private well lost pressure for the third time in one season. Her house was still running an above-ground 3/4 HP jet pump feeding a 32-gallon pressure tank, and the old budget unit she inherited—a Flotec that had already needed one seal repair—would lose prime after every power interruption. She thought the fix was “just add water and restart it.”

Sometimes it is.

Usually it isn’t.

When Elena started comparing instructions, she also saw why many owners with chronic prime-loss problems eventually move to a properly sized Myers well pump instead of pouring water into the same failing setup every few weeks. And that distinction matters, because submersible well pumps and jet pumps do not prime the same way.

This guide walks you through the right sequence: identify the pump type, fill the housing correctly, purge trapped air, restart safely, and diagnose the reason the system lost prime in the first place. Because when your family depends on a residential well pump, the goal isn’t merely getting water back for ten minutes.

It’s getting dependable water back for years.

#1. Confirm Whether Priming Is Even Required — Jet Pump vs. Submersible Well Pump Changes Everything

Priming is the act of filling a pump housing and suction line with water so the pump can create the vacuum needed to lift water. It applies to most jet pumps and other above-ground suction pumps, but it does not apply the same way to a deep well submersible unit already installed below the water line.

That’s the mistake that burns time.

And sometimes burns motors.

A Jet Pump Must Be Water-Filled Before It Can Lift

If your pump is mounted in a basement, pump house, crawl space, or on a slab beside the well, you’re usually dealing with a shallow well pump, convertible jet pump, or another surface-mounted design. These units rely on a suction side. Air in that suction line breaks the vacuum. No vacuum means no water lift.

A typical surface jet pump may need 1 to 2 gallons of water added through the priming port before startup. If the well is more than about 25 feet to water level, a shallow-well jet design is already at its practical lifting limit, which is one reason prime-loss becomes chronic on older rural systems.

How do I know when my well pump is failing? If a jet pump runs continuously, spits air at fixtures, loses pressure after sitting idle, or needs repeated repriming, you’re not looking at normal behavior. You’re looking at a leak, bad foot valve, dropping water level, or internal wear.

A Submersible Pump Doesn’t Get “Primed” the Same Way

A submersible pump replacement in a drilled well is already underwater. That means the pump itself does not need manual priming through a fill plug like a jet pump does. If a homeowner says their submersible “lost prime,” what they usually mean is plumbingsupplyandmore.com the system lost pressure, the check valve failed, the pressure tank waterlogged, or the pump isn’t delivering flow.

That’s exactly what Elena thought at first. Her neighbor told her to “prime the well pump,” but her real issue was an above-ground jet assembly pulling air through a tiny suction-side leak.

This is also where buyers get tripped up when comparing systems. Myers Predator Plus pumps sold through PSAM pair Made in USA 300 Series stainless steel construction with a 36-month warranty for rural homeowners and licensed well contractors. In the field, that kind of pump is often matched with an Amtrol or Flexcon tank and a Square D pressure switch, because the whole system has to work as one.

#2. Kill Power and Inspect the System First — Pressure Switch, Foot Valve, and Air Leaks Decide Whether Priming Will Work

Priming should never be the first thing you do with the power on. The correct first step is isolating electrical power and inspecting the suction side so you’re not masking the failure that caused the prime loss.

This is where good troubleshooting saves you hours.

And sometimes saves a motor.

Start With Power Off and Pressure Bled Down

Shut off the breaker. Verify the pump is dead. Open a nearby faucet and bleed system pressure to 0 psi before removing any priming plug. On a standard home system with a 40/60 pressure switch, you may still have trapped pressure in the housing or line if the faucet isn’t fully relieving it.

Look for obvious clues: damp threads, rust tracks around fittings, mineral crust, or a suction line that has been bumped out of alignment. A pinhole air leak that never drips water outward can still leak enough air inward to make a pump refuse prime.

Elena had a brass plug with old thread sealant barely hanging on. That alone wasn’t her full problem, but it was part of it.

Inspect the Foot Valve, Check Valve, and Suction Pipe

On any jet-pump well water system, a failed foot valve is one of the most common reasons for prime loss. The foot valve is supposed to hold water in the suction line when the pump shuts off. If it leaks down overnight, the line drains back into the well and the pump starts dry.

What causes a well pump to short cycle and lose pressure? Short cycling usually comes from a waterlogged pressure tank, clogged pressure sensing port, or pressure switch misadjustment. Prime loss is different; it points more often to suction leaks, a bad foot valve, or declining well recovery.

If the system loses prime after every outage, suspect the foot valve first. If it loses prime only after several days idle, suspect a slower leak at a threaded union, check valve, or tank tee connection.

#3. Fill the Pump Housing Completely — Air Pockets in the Suction Line Are What Defeat Most Priming Attempts

Correct priming means filling both the pump casing and as much of the suction line as possible with water until trapped air stops escaping. A half-filled casing is not a primed pump; it’s a delayed failure.

That difference matters more than most owners think.

Use the Priming Port and Fill Until Water Stays at the Top

Remove the priming plug and pour clean water into the casing slowly. Don’t rush it. On many private well pump setups, the first gallon disappears quickly because it’s filling an empty suction line. Keep adding water until the level holds near the top of the port.

A funnel helps. So does patience.

If water keeps dropping indefinitely, that’s a strong sign the line is draining back through a leaking foot valve or a suction-side breach. On a healthy shallow-well setup, you should eventually see the fill level stabilize.

For most small residential jet systems, expect to add 1 to 3 gallons before the housing and line are adequately flooded.

Cycle Fill and Wait to Purge Hidden Air

After the first fill, wait 2 to 3 minutes. Then top it off again. That pause lets air migrate up through elbows and restrictions where it otherwise gets trapped. On longer lateral runs, you may need two or three fill cycles before the pump is actually ready.

What is the difference between a jet pump and a submersible pump? A jet pump lifts water by vacuum and atmospheric pressure, which is why suction integrity matters so much. A submersible pushes water upward from below, making it far less vulnerable to prime loss and one reason many rural owners upgrade when the old surface system becomes unreliable.

Elena’s first priming attempt failed because she filled the housing once, reinstalled the plug, and restarted too soon. The second attempt worked better—but only after we corrected the leaking connection that was sneaking air back in.

#4. Restart in the Right Sequence — Pressure Gauge Response Tells You in 30 Seconds What the Pump Is Really Doing

A properly primed pump should begin Plumbing Supply and More myers pump moving water and building pressure within seconds, not minutes. The pressure gauge, sound of the motor, and discharge behavior tell you whether the pump has caught prime or is still churning air.

Listen closely here.

The pump always tells the truth.

Open a Faucet Slightly During Startup

After reinstalling the priming plug and restoring power, leave one faucet cracked open downstream. That gives trapped air a place to escape and reduces the chance of air-locking the system. On a healthy jet pump, you should see sputtering first, then a steadier stream, followed by gauge movement toward cut-out pressure.

Most residential systems should climb from 0 psi toward 40 psi in well under a minute if the pump and suction line are sound. A pump that screams, hums, or runs without pressure gain is not primed yet—or not capable of priming because of an underlying defect.

Read the Gauge Like a Diagnostic Tool

A gauge that jumps quickly to 10 or 15 psi and stalls often points to partial suction, restricted flow, or an air leak. A gauge that rises, then falls back to zero after shutoff often suggests water draining backward through the foot valve or an internal check valve issue.

What does GPM mean for well pump selection? GPM rating means gallons per minute—the amount of water a pump can deliver at a given TDH (total dynamic head). A typical rural home plumbing setup needs about 8 to 12 GPM for normal household use, while larger homes, irrigation, or livestock lines can push demand much higher.

When Elena’s pump finally caught, her gauge rose to 52 psi, held steady, and the line stopped spitting air. Good sign. But the fact that it had needed repeated priming told us the repair wasn’t finished just because the shower worked again.

#5. If the Pump Won’t Hold Prime, Stop Repriming and Find the Root Cause — Leaks, Worn Impellers, and Low Well Recovery Are the Real Problems

A pump that won’t hold prime has a system fault, not a personality flaw. Repeated repriming is a temporary workaround, and every dry start adds heat, seal wear, and motor stress that shortens service life.

That’s how cheap pump ownership gets expensive.

Common Prime-Loss Causes You Can Verify Fast

Start with the simplest causes: leaking suction fittings, cracked unions, weak threaded assembly joints, a failing foot valve, or a suction line pitched in a way that traps air. Then consider deeper causes such as a falling static water level, worn jet assembly, or internal impeller damage.

How long should a submersible well pump last? A professional-grade unit often gives 8 to 15 years of service in normal residential use, and exceptionally well-matched systems can push 20 to 30 years. Budget models in difficult water conditions often cycle out in 3 to 5 years, especially where grit, sand, or off-curve operation are constant.

That lifespan gap is why many homeowners stop spending money on repeated jet-pump rescue attempts once the pattern becomes obvious.

Where Comparison Actually Matters in the Real World

I’ve seen Flotec units give acceptable service on light-duty jobs, but repeated prime-loss on older rural suction systems exposes every weakness fast. Plastic-heavy housings and lower-duty internals may survive on paper, yet sandy water, long suction runs, and summer heat cycles are brutal teachers. On the other side, some older Goulds jet pumps are mechanically solid but still struggle when acidic water and corroded fittings turn the suction side into a leak hunt. And while Franklin Electric has a strong reputation in deep-well equipment, many homeowners comparing repairs discover they’re really asking the wrong question: not “How do I prime this again?” but “Why am I still depending on a system design that keeps losing suction in the first place?”

That’s where a stainless, properly sized submersible upgrade often wins the cost argument. If you’re reprimeing a pump every few weeks, paying for seal kits, and living with erratic pressure, the premium solution is usually worth every single penny.

The Position Experienced Installers Take

If you’re tired of reprimeing the same well system every season, a stainless Predator Plus platform with an 80%+ hydraulic efficiency, 3-year warranty, and 250- to 490-foot head range is the kind of upgrade seasoned installers recommend without hesitation.

That’s not brochure talk.

That’s callback prevention.

#6. What Every Rural Homeowner Should Verify Before Buying a Replacement Well Pump — A Field-Tested Selection Framework

Choosing a replacement pump starts with objective criteria, not brand stickers or horsepower guesses. The best pump for your well is the one that matches water chemistry, depth, demand, control setup, and service expectations as a complete system.

This is the filter I use before I recommend any submersible well pump.

1. Construction Material Comes First

Look for 300 Series stainless steel or another corrosion-resistant all-wet-end material if your water has iron, acidity, or mineral load. Cast iron can survive in some installations, but it is less forgiving in aggressive water; thermoplastic resists corrosion but may not handle abuse, heat cycling, and long-term structural stress the same way.

2. Motor Protection and Efficiency Matter More Than Most Buyers Realize

A motor with thermal overload protection and strong hydraulic design can reduce annual operating cost by up to 20% when running near the best efficiency point (BEP). That matters on a pump that may cycle for years. It also matters during brownouts, hot weather, and marginal voltage conditions common in rural service areas.

3. Match HP and GPM to Real Well Data

Don’t guess. Use static water level, pumping level, vertical lift, pipe friction, and household demand to calculate TDH and required GPM rating. A 1/2 HP pump may be fine for a short-lift cabin, while a 1 HP or 1.5 HP unit may be needed once you push into deeper settings or multiple-bathroom demand.

4. Impeller Durability Is Critical in Sandy Wells

If your aquifer carries fines, choose engineered composite impellers or other grit-tolerant staging. Sand wear destroys efficiency long before total failure. That’s why self-lubricating designs tend to outlast bargain hardware in coastal plain and alluvial wells.

5. Warranty and Field Serviceability Affect Total Ownership Cost

A 3-year warranty has real value when a pump is installed hundreds of feet downhole. So does a design that qualified contractors can service without dealer-only bottlenecks. Emergency pull-and-replace labor is expensive even when the part itself isn’t.

6. Verify 2-Wire vs. 3-Wire Compatibility Before Ordering

A 2-wire well pump simplifies installation and eliminates a separate external control box in many applications. A 3-wire well pump can offer service advantages in some setups, but it adds components that can fail and may add $200 to $400 in replacement parts and labor over time if the existing controls are outdated.

A Real-World Comparison Buyers Should Understand

This is also where the premium-versus-budget discussion gets practical. Some homeowners jump to the cheapest replacement after a prime-loss crisis, then get surprised when the new pump is mismatched to the well and starts short cycling within a year. I’ve seen bargain systems pull high amperage, run off-curve, and wear themselves down simply because nobody calculated TDH correctly. By contrast, contractor-grade packages built around a durable pump, a correctly charged pressure tank, and a properly set pressure switch behave differently: smoother starts, steadier pressure, fewer nuisance callbacks, and longer motor life. Whether the supporting components come from Pentair, Amtrol, or Square D, the lesson is the same—the pump is only as reliable as the system around it.

Elena ultimately stopped throwing time at the old suction system and moved to a 10 GPM, 1 HP downhole setup after the next outage proved the prime-loss cycle wasn’t ending. In the first year, her household pressure stabilized, her pump starts dropped noticeably, and her power use on the water circuit fell by roughly 14%.

#7. Prime Correctly, but Upgrade Intelligently — The Right Repair Depends on Whether You Have a Priming Problem or a Pump Problem

Priming is a procedure, not a cure. If your pump lost prime because of a one-time drain-back event, proper filling and restart may solve it; if it keeps happening, the system is telling you to repair or replace something deeper.

And that’s the part you can’t afford to ignore.

When Repriming Makes Sense

Repriming is reasonable after draining the system for service, replacing a pressure switch, resealing a priming plug, or restoring water to a jet pump that sat empty. It can also work after replacing a bad foot valve or suction fitting, assuming the rest of the pump is mechanically sound.

If the unit catches, reaches cut-out pressure, and holds prime for weeks or months, you fixed a real fault—not just the symptom.

When It’s Time to Stop Pouring Water In

If the pump keeps losing suction, runs hot, fails to build full pressure, or serves a well deeper than the surface pump design can reliably handle, stop treating it like a priming issue. It’s a system-design issue. Repeated dry starts damage seals, bearings, and motor windings. And every time you gamble on “one more restart,” you raise the chance of a no-water emergency at the worst possible hour.

That was Elena’s lesson, and it’s one I see all over rural properties. The most expensive pump is the one you buy three times.

The best outcome is boring water service.

Steady pressure.

No panic.

No buckets.

Frequently Asked Questions

How do I determine the correct horsepower for my well depth and household water demand?

Start with total dynamic head, not guesswork. Most homes need roughly 8 to 12 GPM, and horsepower depends on how far the pump must lift water plus friction losses. A shallow setup may run well on 1/2 HP, while deeper residential wells commonly need 3/4 HP to 1.5 HP.

Measure static water level, pump setting depth, elevation from the wellhead to the pressure tank, and pipe length and diameter. Then add pressure requirement— 40 psi equals about 92 feet of head—to get a working TDH number. From there, use a pump curve instead of a label. A family of four with two bathrooms may be comfortable at 10 GPM, but a house with irrigation, livestock hydrants, or back-to-back showers may need more flow reserve. Oversizing isn’t harmless; it can increase cycling and wear. Undersizing leaves you with weak pressure and long run times. Good sizing is about balancing demand, depth, and efficiency, not buying the largest motor you can afford.

What GPM flow rate does a typical rural household need from a submersible well pump?

A typical rural household is usually well served by 8 to 12 GPM, assuming ordinary fixture use and a properly sized pressure tank. Larger homes, irrigation zones, or livestock watering can push demand into the 15 to 20 GPM range.

The right answer depends on simultaneous use, not the number of faucets in the house. One shower may use 2.0 to 2.5 GPM, a washing machine may draw 3 to 5 GPM, and an outside hose can easily add another 5 GPM. If two or three of those loads hit at once, a low-capacity pump can’t keep up without draining stored tank volume quickly. That’s why pump selection should be paired with tank sizing and pressure settings. Many homeowners blame the pump when the real issue is a tank too small for the demand pattern or a pressure switch set outside what the pump curve can support efficiently.

Why doesn’t a submersible pump usually need priming like a jet pump does?

A submersible pump sits below the water level in the well, so its hydraulics stay flooded during normal operation. A jet pump sits above ground and must pull water upward through a suction line, which means air leaks and drain-back can break prime.

That design difference is huge in the field. A submersible pushes water instead of trying to lift it by vacuum, so it avoids the suction limitations that plague older above-ground systems. When owners say a submersible “lost prime,” they usually mean loss of pressure, a failed check valve, pressure tank trouble, or declining well yield. With a jet pump, priming can be part of normal service after repairs. With a submersible, “priming” is rarely the right diagnostic path and often distracts from the actual fault.

Why is 300 Series stainless steel superior to cast iron for well pump construction?

300 Series stainless steel offers strong corrosion resistance, especially in mineral-rich or mildly acidic water, and it holds up better over time in submerged service. That means less internal rust, less seizure risk, and more predictable long-term performance.

In real wells, water chemistry decides a lot of your maintenance budget. Cast iron can perform well in stable water conditions, but it is more vulnerable to corrosion products and rough internal surfaces as the years pass. That added roughness can affect hydraulic efficiency and serviceability. Stainless components also tend to tolerate seasonal idle periods better, which matters on cabins and low-use rural properties. The material alone doesn’t guarantee a great pump, but in equal-quality designs, stainless wet-end construction usually gives the owner a better shot at long service life.

How do self-lubricating impellers help in sandy or gritty water conditions?

Self-lubricating impeller materials reduce friction and resist abrasion better than many standard components, which helps the pump maintain performance when fine sand or grit is present. They don’t make a pump sand-proof, but they do slow the wear that causes flow loss and premature failure.

Abrasive fines attack impeller edges, diffusers, bearings, and close-clearance surfaces. Once those edges wear, the pump can still run but move less water, draw power less efficiently, and take longer to build pressure. That’s why sandy wells often show “weak pressure” before total motor failure. Composite and low-friction staging materials are valuable because they absorb abuse better than brittle or rougher surfaces. The best strategy is still prevention—proper well development, correct pump setting height off the bottom, and avoiding oversized flow that stirs sediment—but durable staging buys you time and reliability.

Can I install a submersible well pump myself, or should I hire a contractor?

A mechanically skilled homeowner can sometimes replace a shallow system or light submersible setup, but many drilled-well replacements are safer and smarter with a qualified contractor. Pulling drop pipe, handling wire splices, and setting pump depth incorrectly can turn a repair into a fishing job.

The deciding factors are depth, weight, wiring complexity, and local code. A 100-foot assembly with poly pipe is one thing; a 300-foot system with steel drop pipe, torque arrestors, splices, and a pitless adapter is another. You also need to match voltage, wire gauge, pump curve, pressure settings, and tank precharge. A bad splice or wrong depth setting can cost more than the labor you were trying to save. If you can’t safely pull the assembly, test amperage, verify recovery rate, and disinfect the system afterward, hiring out is usually the cheaper decision in the long run.

What is the difference between 2-wire and 3-wire well pump configurations?

A 2-wire well pump has the starting components built into the motor and usually requires no separate above-ground control box. A 3-wire system uses an external control box, which can simplify some diagnostics but adds parts and wiring.

For homeowners, 2-wire configuration often means a cleaner installation and fewer wall-mounted components to fail. For some contractors, 3-wire configuration offers service advantages because start capacitors and relays are accessible without pulling the pump. Neither is automatically better in every application. What matters is compatibility with the motor, depth, load profile, and the controls already in place. If you’re replacing a pump only, verify whether the existing setup expects an external control box before ordering, because a mismatch can turn a simple swap into a wiring headache.

What accessories do I need besides the pump for a complete well system installation?

A complete installation usually requires more than the pump itself: drop pipe, wire, a wire splice kit, check valve if specified, pitless adapter or well seal, pressure tank, pressure switch, fittings, and often a safety rope or cable guards depending on the setup.

That list changes with the well type and local practice. Some systems also need a new tank tee, pressure gauge, relief valve, sediment protection, or updated breaker sizing. If you’re reusing old components, inspect them honestly. A new pump tied to a failing pressure switch or undersized tank can still perform badly. This is why complete system planning matters more than single-part shopping. Owners often spend heavily on the pump, then try to save money with aging fittings and controls that were already near the end of life.

How long should a quality well pump last with proper maintenance?

A quality professional-grade well pump commonly lasts 8 to 15 years, and in well-matched, clean-water conditions it can run much longer. Service life depends on cycling frequency, water quality, depth, heat, and whether the pump operates near its intended efficiency range.

The pump’s environment matters as much as its nameplate. Frequent short cycling from a bad pressure tank can kill a good motor early. Sand abrasion can wear impellers long before bearings fail. Low-voltage conditions and lightning events can end a pump instantly even if the hydraulics are still sound. Annual checks of pressure settings, tank precharge, amperage draw, and sediment symptoms can catch those issues before they become emergencies. In rural service calls, the longest-lasting pumps are rarely just “better built”; they’re usually better matched and better protected.

What maintenance tasks extend well pump lifespan the most?

The most effective maintenance is preventing rapid cycling, voltage stress, and abrasive wear. Check pressure tank precharge annually, verify switch operation, watch for sediment, and investigate any new air sputtering, pressure drop, or unusual pump run time right away.

For jet pumps, inspect priming plugs, suction fittings, and foot-valve performance whenever pressure behavior changes. For submersible systems, pay attention to pressure fluctuations, rising electric consumption, or longer fill times at fixtures and hose bibs. If you have sandy water, add filtration or address the well source before the pump pays the price. And after any well service, sanitize the system properly. Good maintenance isn’t glamorous, but it’s how you turn a pump that “should have lasted” into one that actually does.

Conclusion

Priming a water pump correctly is mostly about doing the simple things in the right order: identify the pump type, shut power off, fill the housing completely, purge air patiently, and restart with the gauge in view. But the bigger lesson is this: if the system keeps losing prime, your real job is diagnosis, not repetition.

That’s where homeowners get ahead.

A one-time priming event is maintenance.

A recurring priming event is evidence.

And if that evidence points to a tired suction system, poor materials, the wrong pump curve, or a well configuration better suited to a submersible design, you’re better served by solving the whole problem than by carrying another bucket to the priming port.

Author Bio

Darius Okafor is a certified pump system inspector with 13 years of field experience across the Driftless Area of western Wisconsin and southeast Minnesota. He has audited more than 600 rural water systems, with a specialty in low-yield wells, pressure instability, and failure analysis after improper pump sizing.