Reliable water isn’t a luxury in the country—it’s the lifeline of your home. When pressure drops to a trickle and the shower runs cold, pipe size and fittings suddenly matter as much as pump horsepower. I’ve answered those panicked calls for three decades. A perfectly sized Myers Predator Plus submersible can still disappoint if the discharge line is undersized, the check valve is cheap, or the pitless adapter leaks air. Small mistakes cost big—higher amperage draw, premature motor wear, and frustrating pressure swings.
On a frosty morning outside Bozeman, Montana, the Koehlani family learned this the hard way. Jonah Koehlani (41), a high school science teacher, and his spouse, Marisol (39), a remote bookkeeper, live with their kids—Rafa (11) and Lani (8)—on 6 acres. Their 265-foot private well ran a competitor pump for four years. When that older Goulds unit began short-cycling, a contractor swapped only the pump and left 3/4-inch poly in place with a bargain check valve. Three months later, the pump overheated, pressure tank chattered, and the house went dry. Jonah dragged jugs from a neighbor in sleet while we assessed the system. The fix wasn’t just a new pump—it was pipe friction, fittings, and flow discipline.
In this list, I’ll show you how to pair your Myers Predator Plus with the right: pipe diameter to control TDH, pitless adapter for freeze-proof reliability, check valves that prevent water hammer, pressure tank sizing to curb cycling, 2-wire vs 3-wire decisions, staging and BEP alignment, union placement for serviceability, drop pipe materials for longevity, pressure switch and tank tee layout, discharge manifolds for irrigation, filtration without starving the pump, and winterization strategies. Whether you’re a DIY rural homeowner or a licensed contractor on a tight schedule, these choices turn a great pump into a great system.
Awards and proof points matter here, too. Myers Pumps—backed by Pentair—bring 80%+ hydraulic efficiency near the Best Efficiency Point (BEP), Pentek XE high-thrust motors with thermal overload protection and lightning protection, and a rock-solid 3-year warranty that beats the 12–18 months I still see around the industry. Add 300 series stainless steel construction and field serviceable, threaded assembly design, and you’ve got a platform worth building your plumbing around. At PSAM, we keep the support practical: same-day shipping on in-stock units, pump curves, and my “Rick’s Picks” accessory bundles that prevent call-backs.
Let’s optimize your Myers system—once, right, and built to last.
#1. Choose the Right Discharge Size – 1-1/4" NPT, TDH Control, and Pump Curve Alignment
Friction loss is the hidden thief of pressure and flow; undersized pipe pushes your Myers motor harder, raises amperage, and steals years off service life.
Most residential submersible well pump installations start on a 1-1/4" NPT discharge size. Your pipe run—downhole drop pipe and horizontal line into the basement—must keep friction loss under control so the system operates near the pump’s BEP (best efficiency point). On a 1 HP Predator Plus Series at 10 GPM, 1-inch pipe can easily add 10–20 feet of extra TDH (total dynamic head) across a long run. That shifts the pump right on the pump curve, reducing efficiency and raising heat. Upsizing to 1-1/4-inch or even 1-1/2-inch on long horizontal distances keeps TDH honest, pressure steady, and energy bills down.
For context, Jonah and Marisol Koehlani’s well used long 3/4-inch poly across a 90-foot trench. We upsized to 1-1/4-inch CTS PE4710 and saw a clean 8–10 PSI gain at the tank tee with the Myers 1 HP set at 250 feet.
Pipe Diameter vs Flow Velocity
High velocity chews up fittings and triggers noise. Keep water speed under 5 ft/s for noise control and under 8 ft/s to protect fittings. At 10 GPM:
- 3/4-inch pipe can exceed 7–8 ft/s—too fast for longevity. 1-1/4-inch sits near 3–4 ft/s—ideal for quiet, efficient service. This alone reduces cycling stress and protects your Pentek XE motor.
Using Pump Curves to Pick Diameter
Start with your target GPM and static head. Add friction loss from a pipe chart and fittings. Choose a pipe size that keeps friction under 10–15% of your static head. An extra 30–40 feet of head from friction shifts many systems out of BEP; better diameter puts you back in the sweet spot.
Transition Fittings Done Right
When stepping from 1-1/4-inch down to fixtures, do it after the pressure tank using a proper tank tee and full-port fittings. Avoid choked transitions mid-run. It’s amazing how one 3/4-inch elbow at the wrong spot undermines performance.
Key takeaway: Let the pump breathe—size pipe for the curve, not the trench cost.
#2. Drop Pipe Materials That Last – 300 Series Stainless Connections, PE4710 Poly, or Schedule 120 PVC
Down the well, your drop pipe is mission-critical; it must handle torque, tensile load, and water chemistry without introducing leaks or clogging.
I prefer high-density PE4710 poly in cold climates for flexibility and freeze resilience. Use true stainless insert barbs (not plated) with dual stainless clamps per side. In hot regions or very deep sets, Schedule 120 PVC offers rigidity and lower stretch but needs torque management and precise PSAM myers pump threading. Regardless of pipe type, the threaded top coupling that meets your Myers discharge should be 300 series stainless steel—the same corrosion-resistant standard used in Myers components.
Jonah’s first install used mixed metal fittings that pitted in two winters. When we standardized to stainless barbs and couplings, plus a torque arrestor and safety rope, the string stayed straight and serviceable.
PE4710 Poly: The Workhorse
- Excellent cold-weather performance Handles expansion/contraction without cracking Requires quality stainless barbs and proper clamp torque Ideal for 1/2–1.5 HP residential sets up to ~300 feet
Schedule 120 PVC: The Rigid Option
- Superior tensile capacity for deep sets Threaded joints need thread sealant compatible with PVC Use a cable guard every 10–20 feet to prevent wire rub Keep alignment straight to avoid side loading at the pump discharge
Stainless Everywhere It Counts
At the top end, use stainless check valves and intake screen interfaces. Avoid cast or plated mystery metal. Myers’ 300 series stainless steel ethos is your cue: match the pump’s quality up the line.
Key takeaway: Your drop pipe is your lifeline—choose materials that match the pump’s life expectancy.
#3. Pitless Adapter and Well Seal Choices – Freeze Protection, Leak-Free Transitions, and 1-1/4" Throughputs
A leaky pitless adapter costs you more than water—you also lose prime pressure, burn energy, and short-cycle the system.
In freezing climates, a quality pitless adapter with full 1-1/4" NPT throughput preserves the flow the Predator Plus Series can deliver. Poorly cast pitless units trap turbulence and add head loss; precision-machined units maintain bore and alignment. The wellhead deserves a proper well cap or well seal that keeps bugs and dust out, and wiring secure.
On the Koehlani property, the old pitless had a step-down internal bore. Swapping to a full-flow stainless pitless shaved 4–5 PSI of loss at 10 GPM, observable at the tank tee.
Full-Flow Matters
A true full-bore pitless prevents hidden bottlenecks. Look for CNC-machined bodies, EPDM seals, and stainless fasteners. Cheap pitless? Expect misalignment, drip leaks, and weird pressure swings.
Seal Integrity and Wiring Protection
Your well seal or cap must clamp cables without cuts. Add a proper wire splice kit—heat-shrink, resin, and adhesive-lined. Electrical reliability starts here.
Service Access
Choose pitless adapters designed for easy pull with a pull pipe. Your Myers pump’s threaded assembly invites field service; match that with hardware that won’t fight you during a winter pull.
Key takeaway: A premium pitless is a one-time buy that prevents a lifetime of nuisance leaks.
#4. Check Valve Strategy – Preventing Water Hammer, Backspin, and Motor Strain
Few choices impact pump life like smart check valve placement. Done badly, you get water hammer and thrust loading; done right, the system runs silent and calm.
I recommend a quality stainless or bronze check at the pump discharge—skip plastic checks that stick. Myers’ internal check is robust, but on deeper sets or long risers, add one external check at 25–30 feet above the pump and one topside after the pitless. More is not better; too many checks can trap air and cause hammer.
The Koehlanis originally had a single bargain check topside. It chattered, backspun the motor, and spiked the amps on every start. Upgrading to two stainless spring checks—one downhole, one inside—eliminated the noise and protected the Pentek XE motor.
Spring vs Swing Checks
Spring checks offer crisp closure, less hammer, and better vertical performance. Swing checks can work horizontally but are slower to close and more prone to chatter.
Placement and Access
Keep the topside check downstream of the pressure tank? No—install it before the tank tee so the pressure tank sees line pressure and air isn’t trapped between checks. Service unions near the topside check are a life saver.
Air Entrainment and Hammer
Avoid stacking checks in odd places. Limit to 2–3 total. Verify close times and spring orientation for vertical runs.
Key takeaway: Use two smart checks, not five cheap ones. Silence and longevity follow.
#5. Pressure Tank Sizing and Tank Tee Layout – Killing Short Cycling and Stabilizing Pressure
Your pressure tank and tank tee layout determine cycling frequency. Short cycling cooks motors and contact points faster than any other mistake I see.
Aim for a drawdown that limits cycling to under 6–10 starts per hour. For a typical 1 HP deep well pump supplying 10 GPM, a 44–86 gallon tank works well depending on usage profile. At 40/60 PSI, a 62-gallon tank offers roughly 18 gallons of drawdown—plenty to keep the Pentek XE cool between starts.
When we upsized the Koehlanis’ tank from 20 gallons to 62 gallons and set a proper 38 PSI precharge, short cycling disappeared. Laundry and showers stopped “yo-yoing.”
Tank Tee Essentials
Use a full-port tank tee with integrated gauge port, drain, and relief valve port. Keep the check valve before the tee. Add a full-port ball valve upstream for service isolation.
Pressure Switch Positioning
Mount the pressure switch on the tank tee or nearby manifold to avoid sensing lag. Use a short, clean 1/4-inch nipple; long spaghetti tubing causes delayed response and chatter.
Precharge and Calibration
Set tank precharge 2 PSI below cut-in. Verify with a reliable gauge, tank empty. With 40/60, set 38 PSI. Recheck annually.
Key takeaway: Size the tank for your starts per hour target; protect the motor with calm, measured cycles.
#6. 2-Wire vs 3-Wire Configurations – Simplicity, Control Boxes, and Installation Cost
Control strategy affects installation cost and service simplicity. With Myers, you have flexible 2-wire configuration and 3-wire configuration options.
A 2-wire well pump (actually two wires plus ground) keeps the start components in the motor—clean, simple, fast installs. A 3-wire well pump uses an external control box, which can simplify diagnosis and part swaps at the surface. For most residential wells to 300 feet and 1–1.5 HP, 2-wire is the budget-friendly, reliable pick.
The Koehlanis chose 2-wire for their 1 HP Predator Plus. It kept parts count low and cut install time. With proper surge protection, the Pentek XE motor starts smoothly and stays cool.
When 3-Wire Makes Sense
- Deep sets with heavy starting load Preference for surface-accessible capacitors and relays Contractors who standardize on external control components
When 2-Wire Wins
- Straightforward residential installs Lower upfront cost and fewer points of failure Clean electrical layout with fewer penetrations
Surge and Lightning Protection
Regardless of configuration, add proper surge protection and grounding. The lightning protection built into Pentek XE helps, but a clean panel setup is good insurance.
Key takeaway: With Myers flexibility, pick the wiring strategy that fits your service philosophy and budget.
#7. Fittings that Protect Flow – Full-Port Valves, Long-Radius Bends, and Union Strategy
Choked fittings and sharp turns steal flow, generate turbulence, and make even a premium pump look mediocre.
Use full-port ball valves on main lines, long-radius elbows on tight transitions, and unions exactly where you’ll need to disassemble. Avoid multi-turn stop valves and narrow-bodied valves on primary runs. Every restriction adds TDH you didn’t plan for.
We replaced the Koehlanis’ narrow stop valve with a full-port ball valve and two long-sweep 90s. The pressure rise was immediate and the basement got quieter.
Union Placement (Rick’s Rule)
- One union before the tank tee One before the filtration manifold One before any branch to irrigation or outbuildings You’ll thank yourself on service day.
Keep the Bore Consistent
Match the internal diameter of valves and tees to your main line size. A 1-1/4-inch line with a 1-inch valve is a false economy.
Teflon Tape vs Dope
Use PTFE tape plus a compatible thread sealant on stainless and brass. Avoid over-torquing stainless threads; galling is real. Clean, aligned threads prevent micro-leaks.
Key takeaway: Smooth fittings make smooth systems—design for flow, not for the bin of random parts.
#8. Filtration Without Starving the Pump – Sediment, Iron, and Cartridges That Preserve GPM
Filtration is vital, but the wrong filter starves your pump and pushes it off the curve. Choose housing size and cartridge type by flow demand and water chemistry.
Start with a proper water test. If you’re dealing with sand or grit, install a spin-down sediment filter upstream of cartridges to protect engineered composite impellers and self-lubricating impellers in the Teflon-impregnated staging. For iron, consider an iron reduction system with adequate backwash rate, not a tiny cartridge that plugs weekly.
We set the Koehlanis up with a spin-down prefilter and a big 4.5 x 20-inch sediment cartridge. Their Myers 1 HP at ~10 GPM cruises through, and the kids can run the shower and dishwasher without a pressure sag.
Correct Filter Sizing
- 10-inch housings are for point-of-use, not whole-house at 10–12 GPM 20-inch big-blue style or larger for main line Verify pressure drop at rated flow (target <5 PSI) </ul> Backwash Rates Matter Iron and manganese systems need 7–12 GPM backwash depending on media. Ensure your pump and line sizing can deliver backwash or choose appropriate media. Protect the Pump, Not Just the Fixtures Filtration upstream of the tank protects valves and the tank tee. If heavy iron is present, locate filters where you can drain and service without a mess. Key takeaway: Right-sized filtration preserves pump efficiency and household sanity. #9. Irrigation and Branch Manifolds – Separate Loads, Balanced Flows, and BEP-Friendly Distribution Household water and irrigation shouldn’t fight for the same undersized branch. Build a manifold that respects your pump’s curve and total system GPM rating. For a Myers 1–1.5 HP supplying 10–15 GPM, route irrigation through a separate line with its own valve and pressure regulation. If you need 20+ GPM for zones, consider a dedicated booster pump pulling from a storage tank—don’t ask a residential multi-stage pump to do two jobs poorly. On the Koehlani property, we added a separate 1-inch irrigation branch post-tank. Lawn zones now run without starving showers, and the pressure switch cycles reasonably. Zone Sizing and Flow Limits Design zones to stay within 80% of the pump’s comfortable continuous flow—avoid running the pump far right on the curve for long durations. That keeps hydraulic efficiency high and surface pressure stable. Manifold Components Use full-port valves, gauges, and unions for service. Label each zone valve. Keep sweeps generous to reduce turbulence. Pressure Regulation Sprinklers and drip have different needs. Regulate each as required. Make the pump’s life easier by presenting stable downstream pressure. Key takeaway: A thoughtful manifold turns one pump into a well-behaved, multi-duty system. #10. Competitor Reality Check: Why Pipe and Fittings Expose the Differences – Myers vs Goulds vs Grundfos Material and motor technology shine or stumble once you start pushing water through real plumbing, not lab manifolds. Here’s what field data shows. Technical performance analysis: Myers’ 300 series stainless steel shell, discharge bowl, and shaft resist corrosive water far better than cast-iron-laden alternatives. The Pentek XE motor delivers strong starting torque with lower heat rise, supporting the pump’s 80%+ efficiency when held near BEP via proper pipe sizing. In contrast, Goulds Pumps models that rely on cast iron components can suffer corrosion in acidic or mineral-rich wells, impacting stage clearance and efficiency over time. Grundfos often steers toward 3-wire configuration and more complex control systems; while capable, they raise install cost and add failure nodes in the field. Real-world differences: Field-serviceable threaded assembly on Myers means you can swap stages or address wear without replacing the entire unit. When paired with full-bore pitless adapters, 1-1/4-inch mains, and full-port fittings, Myers systems keep amp draw down and pressure steady. Goulds units in challenged water sometimes show rust scale accumulation and progressive loss of head. Grundfos systems with external controls add boxes and wiring that complicate rural service calls and inflate costs. Value proposition: For rural homes dependent on a single system, Myers’ stainless build, Pentair-backed R&D, and 3-year coverage make a compelling reliability case—worth every single penny. #11. Field-Serviceability and Access – Unions, Rope, Cable Guards, and Pull-Friendly Layouts Planning for service day is how you save tomorrow’s Saturday. Myers’ field serviceable design invites smart access choices. Install a safety rope rated for the pump’s weight; tie it to a secure well cap anchor. Use cable guards every 10–20 feet to prevent wire rub along the casing. Place unions strategically at the tank tee, filter manifold, and irrigation branch. Label valves. Document set depth and static level at the panel. For the Koehlanis, we left a laminated set sheet: pump model, set at 250 feet, static at 120 feet, 1-1/4" CTS PE4710, and surge protection details. When something needs attention in five years, no guesswork. Pull Pipe and Pitless Keep a dedicated pull pipe for the pitless. Don’t improvise. A smooth pull protects the drop pipe and wiring. Wire Splice Kit Quality Use heat-shrink, adhesive-lined splices—no crimp and electrical tape specials. Moisture intrusion kills motors. Labeling and Gauges Install a reliable liquid-filled gauge. Add a second test port downstream of filtration. Data helps you see problems before they become emergencies. Key takeaway: The easiest system to fix is the one you planned to fix. #12. The Stainless Advantage Under Pressure Cycles – Myers vs Red Lion (Thermoplastic) in the Real World Pressure cycling, thermal expansion, and grit separate real submersibles from catalog copy. Stainless earns its keep day after day. Technical performance analysis: Myers employs 300 series stainless steel shells and critical wetted parts, plus engineered composite impellers within Teflon-impregnated staging. This combination resists abrasion and maintains clearances. By contrast, Red Lion models using thermoplastic housings can deform or crack under repeated hot-cold cycles and dynamic pressure loads. With solid 80%+ efficiency near BEP and the Pentek XE motor’s protective features, Myers keeps heat generation in check, protecting windings and seals. Real-world application differences: In rural installs with fluctuating use—showers, laundry, irrigation starts—stainless bodies keep their shape. Thermoplastic shells have shown micro-cracks at threaded interfaces or stress points, leading to leaks and early retirements. Myers’ 3-year warranty exceeds what you typically see on budget lines, reflecting the expected 8–15 year service window with proper care. Value proposition: Stainless construction, higher efficiency, and service-friendly design reduce lifetime costs and emergency calls—worth every single penny. FAQ: Myers Pump Pipe and Fitting Choices, Answered by Rick 1) How do I determine the correct horsepower for my well depth and household water demand? Start with your static water level, set depth, and total dynamic head (TDH), then match your flow target. A 1 HP submersible in the Predator Plus Series typically supports 8–12 GPM up to roughly 300 feet of head. Add friction from your chosen pipe size and fittings to static lift and service pressure (convert PSI to feet: PSI x 2.31). For a 265-foot well drawing 10 GPM through 1-1/4-inch mains, a 1 HP often hits BEP. Families with irrigation or large homes may need 1.5 HP. Use the Myers pump curve to confirm that your operating point sits near the curve’s flat sweet spot. My recommendation: call PSAM with your depth, target GPM, and line length; we’ll map TDH and point you to 1/2, 3/4, 1, 1.5, or 2 HP as needed. 2) What GPM flow rate does a typical household need and how do multi-stage impellers affect pressure? A standard rural home runs nicely at 8–12 GPM. Larger homes or irrigation zones can require 12–20 GPM. The multi-stage pump architecture in Myers stacks impellers vertically, converting motor energy into progressively higher pressure, enabling deeper lifts at practical GPM. At a given horsepower, higher staging delivers more head at a slightly lower max flow, which is perfect for deeper wells. Look at the stages and match them to your TDH target on the pump curve. With Myers, you’ll see options that deliver 7–8 GPM at deeper heads or 15–20 GPM at shallower heads—pick the staging that meets your reality. 3) How does the Myers Predator Plus Series achieve 80% hydraulic efficiency compared to competitors? Efficiency comes from tightly matched engineered composite impellers, Teflon-impregnated staging that self-lubricates, and optimized hydraulics that minimize recirculation and slip. Pair that with the Pentek XE motor—high-thrust design, efficient windings, and thermal overload protection—and you get low heat rise and stable amp draw near BEP. Maintaining efficiency requires correct pipe diameter, full-port fittings, and minimized elbows to avoid friction that drags the operating point away from the curve’s sweet spot. In practice, homeowners see up to 10–20% lower energy cost compared to mismatched systems. 4) Why is 300 series stainless steel superior to cast iron for submersible well pumps? Submerged components live in oxygen-poor, mineral-heavy water. 300 series stainless steel resists corrosion in acidic or high-iron conditions, maintaining surface finish and mechanical integrity. Cast iron corrodes, builds scale, and can seize impellers or foul wear rings over time. Stainless protects threads, couplings, and the discharge bowl—places where leaks and misalignment love to start. Myers commits to stainless in critical components—shell, discharge bowl, shaft, coupling, wear ring, and suction screen—giving you durable geometry that stays in spec for the long haul. 5) How do Teflon-impregnated self-lubricating impellers resist sand and grit damage? Grit acts like sandpaper. In the Predator Plus Series, self-lubricating impellers and Teflon-impregnated staging reduce friction and heat, so abrasive particles do less harm. The materials also recover from minor contact events without galling. While no pump loves sand, Myers’ staging buys you time and reduces wear rate compared to standard composites. Add smart filtration—a spin-down ahead of cartridges—and keep flow velocities reasonable. The combination protects clearances and maintains head. 6) What makes the Pentek XE high-thrust motor more efficient than standard well pump motors? The Pentek XE motor is engineered for high starting torque and continuous duty with controlled heat rise. Efficient windings, thermal overload protection, and integrated lightning protection keep the motor safe under real-world power quirks. High thrust bearings handle vertical loads from multi-stage pumps better, reducing axial wear. Efficient starts and lower operating amps translate to less heat, longer life, and consistent performance—especially when your plumbing keeps the pump near its curve sweet spot. 7) Can I install a Myers submersible pump myself or do I need a licensed contractor? Competent DIYers with electrical and plumbing experience can install a submersible, especially a Myers 2-wire well pump setup. You’ll need the right tools, a wire splice kit, torque arrestor, pitless adapter, and safe lifting methods. That said, many states require licensed work for well and electrical connections. Contractors bring pull rigs, sealing know-how, and code compliance. My rule: if your set is deeper than 150 feet or you’re unsure about wire sizing, hire a pro. Either way, PSAM can supply the complete kit and the spec guidance. 8) What’s the difference between 2-wire and 3-wire well pump configurations? A 2-wire configuration houses start components in the motor—fewer parts, cleaner install. A 3-wire configuration uses an external control box for the start capacitor and relay. 2-wire is typically lower cost and easier for most residential applications up to 1–1.5 HP. 3-wire can simplify future capacitor replacements and is preferred by some contractors for diagnostic clarity. Myers offers both, so you can align with your service philosophy. Protect either with panel surge protection. 9) How long should I expect a Myers Predator Plus pump to last with proper maintenance? Expect 8–15 years in normal residential service, extending to 20–30 years with excellent care—correct sizing, right pipe diameter, clean filtration, calm cycling (few starts per hour), and lightning protection. The 3-year warranty reflects this confidence. Keep an eye on pressure trends, cycle counts, and water quality. If pressure sags over time, check filters and gauges plumbingsupplyandmore.com before blaming the pump. 10) What maintenance tasks extend well pump lifespan and how often should they be performed?
- Check tank precharge annually; set 2 PSI below cut-in. Inspect and replace sediment filters every 3–6 months or as pressure drop dictates. Test pressure switch function yearly; replace pitted contacts. Inspect well cap, conduit seals, and pitless adapter for leaks each season. Verify surge protection indicators after storms. Log static water level periodically to spot aquifer changes. These steps keep your Myers operating at spec and prevent nuisance failures.