The shower went cold, the pressure dropped to a trickle, then nothing. No sink, no toilets, no washing machine—and a family staring down an urgent, after-hours well call. If your water system depends on a submersible well pump, a single misstep with check valve placement can cause short cycling, water hammer, or premature motor failure. I’ve seen it too many times: a reliable pump hamstrung by two dollars’ worth of fittings installed in the wrong spot.
Two weeks ago, I got a call from a new family on the edge of Jasper County, Missouri. Miguel and Amaya Alvarado (38 and 36), a high school math teacher and a nurse, live with their kids—Luca (9) and Camila (6)—on five acres outside Carthage. Their 185-foot well with a 1 HP, 230V pump had been acting up: long waits for pressure recovery, loud bangs at the tank tee, and middle-of-the-night cycling. Their previous Red Lion submersible lasted barely three years before the impellers chewed themselves to bits. This time, with a new Myers Pumps upgrade already planned, the check valve layout pushed their system into trouble.
For any rural household, reliable water isn’t optional. It’s showers before work, clean dishes, animal waterers that don’t freeze up, and sprinklers that reach the garden beds. This list focuses on the exact do’s and don’ts of check valve placement with a Myers Predator Plus Series install. Here’s what we’ll cover: why you need a single primary valve at the pump discharge; how to space any auxiliary valves; how elevation and static head change the rules; the right way to pipe to your pressure tank and avoid water hammer; how long vertical drop pipe runs affect TDH; and when the built-in internal check valve inside many Myers models is enough.
Let’s nail down your configuration, save your motor from abuse, and stop that midnight cycling for good.
#1. One Primary Check Valve at the Pump Discharge – Pair Myers Predator Plus With a Positive Seal at the Source
Your first line of defense against backflow and cycling is a single, rock-solid check valve right at the pump discharge, ideally within 1-2 feet of the outlet. Put it correctly, and your pump rests between cycles; put it wrong, and you’ll chase ghost leaks and hammer for months.
At the heart of a properly designed Myers system is the Predator Plus Series, built from 300 series stainless steel with threaded assembly for field service. Many Predator Plus submersibles include an internal check valve, engineered to seal reliably under submergence. In deep wells, or when retrofitting a mixed-brand system, I still recommend an external, spring-loaded poppet valve right at the pump discharge. This arrangement keeps the water column stable and prevents reversal on shutoff. Use a high-quality valve with corrosion-resistant internals; install arrow toward flow, threads sealed, and torque to spec. When you stop reverse flow right at the motor, you protect bearings and thrust surfaces—cheap insurance for a high-value assembly.
Miguel and Amaya’s old layout placed the only check valve 38 feet above the pump. That gap let the column run backward at shutoff, then slam shut—hello, water hammer. The new install: a Myers Predator Plus 1 HP with external discharge valve and clean vertical lift. Night-and-day difference.
Pump Discharge Best Practice
Put the primary check valve within 1-2 feet of the pump discharge. This keeps static load off the impellers and the Pentek XE motor at rest between calls. In vertical installations with long columns, that close-proximity seal eliminates reverse flow and the pressure wave that hammers fittings. Use stainless or brass-bodied valves, never plastic.
Respect the Built-In Valve—But Verify
A Predator Plus with an internal check valve can be sufficient in many 100-200 ft wells. For older wells with mineral scale or grit, I add a second valve at the discharge to share sealing duty. Test by shutting off the pressure tank supply and watching pressure drop. If it holds steady, the system is tight.
Key takeaway: A positive-sealing check at the discharge is non-negotiable. Start here and 80% of cycling issues vanish.
#2. Don’t Stack Multiple Check Valves Near the Tank – One at the Pump, One at the Tank Tee (Max), Properly Spaced
It’s tempting to pepper the line with check valves “just to be safe.” In practice, clusters of valves near the house trap pressure, confuse diagnostics, and create water hammer. Use one at the pump, and—if needed—one at the house. No more.
My go-to rule with Myers Pumps in standard residential systems: one primary at the pump discharge, and optionally one at the tank tee in the basement or crawl. Keep them far apart—ideally the full rise of the drop pipe—to avoid deadheading sections of pipe and erratic pressure readings. If you place multiple checks within a few feet of each other, trapped columns will expand and contract, ticking your switch on and off. Over time, that abuses contactors and invites nuisance cycling.
With the Alvarados’ new layout, we put a sealed check at the pump and a single inline valve on the horizontal run just before the tank tee. The moment we removed the extra “mystery” basement valve installed by a previous owner, the hammer disappeared.
House-Side Valve Location
If your well line enters near the pressure tank, install the house-side check immediately before the tank tee on the main line. Keep it accessible and oriented properly. This ensures the tank sees the line pressure continuously without isolated pockets.
Spacing and Elevation
If there’s 100+ feet of vertical lift, a discharge valve at the pump and a single house valve provide excellent control. More than two valves invite chatter. Use the height difference as your “spacer”—it stabilizes columns naturally.
Key takeaway: Two check valves are plenty for 95% of homes. More isn’t better—it’s louder and harder to diagnose.
#3. Respect TDH and Pipe Rise – Check Valve Rules Shift With Column Weight and Static Level
Total Dynamic Head ( TDH) determines real-world system behavior. As TDH climbs, the reverse-force at shutoff grows, and slamming becomes costlier. Correct valve position changes with elevation, friction loss, and pump staging.
A Predator Plus Series 1 HP at 185 feet (like the Alvarados) is comfortable on head, but friction adds up at elbows and the pitless adapter. The right check valve strategy manages both column weight and friction-induced reverse motion. I prefer a high-quality discharge valve and one at the house. For steeper wells—say 250 feet and above—I’ll sometimes use a mid-column valve at roughly 80-100 feet above the pump, but only if the house-side valve is eliminated. Never place mid-column and house-side checks together; you’ll trap a vertical slug and cause bounce.
After we corrected the Alvarados’ check strategy, their GPM rating stabilized at fixtures, and the system stopped wheezing on restart.
Friction, Fittings, and Flow
Long runs of 1” or 1-1/4” poly or PVC impact TDH. Add bends, unions, and a pitless adapter, and your dynamic load rises. Check valves see that load at shutoff—so choose spring-loaded units that seal without slamming. Avoid rubber-flapper styles for deep wells.
Pipe Diameter and Column Stability
Upsizing the line from 1” to 1-1/4” where feasible cuts velocity, which softens closures. Pair that with a discharge-side check to minimize reverse acceleration. Result: fewer pressure waves, longer component life.
Key takeaway: Match check valve plan to TDH. Deeper wells mean stricter placement and better-quality valves.
#4. Quiet the Hammer – Use the Tank Tee Wisely and Control Velocity Into the Pressure Tank
Water hammer isn’t “just annoying.” It loosens electrical connections, fatigues solder joints, and beats up your pressure switch. Good check valve placement tames it; the right piping at the tank tee finishes the job.
At the home, route your well line straight to the tank tee with minimal elbows. If you’re using a house-side check valve, set it before the tee so the pressure tank senses true line pressure and feeds the system smoothly on draw. Combine this with a short rise to fixtures, and the Pentek XE motor sees fewer rapid restarts. For the Alvarados, we mounted the first 90-degree elbow a full 12 inches past the tee, used full-port valves for throttling, and installed the gauge on the tee for reliable readings. Hammer gone. Switch life extended.
When your pump shuts off, a properly placed check prevents column backspin. The tank then releases water quietly without jerking the line. It’s small work that pays big.
Pressure Switch and Tee Orientation
Mount the pressure switch on a clean, vibration-free section of the tank tee. With a check before the tee, your switch sees the same pressure your tank sees. No deadlegs, no trapped air, and no false triggers.
Velocity Control Near the Tank
If you’re seeing spikes, consider a short length of larger-diameter pipe near the tee to slow velocity. Lower feet-per-second equals quieter closures at valves and fixtures. Pair with a high-quality house-side check for best behavior.
Key takeaway: The tank tee is where sound installs win. Make it straight, measured, and pressure-true.
#5. Use Myers’ Internal Check Valve Wisely – When It’s Enough and When to Add External Support
Many Myers Pumps in the Predator Plus Series include an internal check valve, precision-fit to the pump’s discharge. In 100–150-foot wells with clean water, that single valve is often enough. Add a second only if your run includes long horizontal distances, elevation swings, or intermittent hammer.
Internal checks are engineered to close quickly without slam, matched to the threaded assembly and discharge bowl. Pair plumbingsupplyandmore.com that with the 3-year warranty backing and you’ve got a robust baseline. My field rule: in shallow-to-mid wells with straight shots and tidy head calculations, trust the internal check. In deeper or more complex installs, add a spring-loaded external check at the pump discharge to share the load.
The Alvarados’ new setup kept Myers’ internal valve and added a stainless external one at the discharge. That combination held pressure perfectly and ended their overnight cycling streaks.
Evaluating Pressure Hold
Close the main valve feeding the house and watch the gauge. Pressure should hold within a few PSI over 30 minutes. If it falls quickly, suspect either the check valve or a house-side leak. Don’t guess—test.
Clean Water vs. Sand/Grit
In wells with fine sand, the internal check can gum over time. That’s where an external upgrade pays off. Myers’ design handles grit better than most, but any valve benefits from clean flow and proper filtration.
Key takeaway: Internal checks are excellent in many cases. Add an external only when the system complexity or water quality calls for it.
#6. Do Not Put a Check Valve Between the Tank and the House – Let the Tank Breathe the System
I’ve seen it: a homeowner chases low pressure and pops another check valve after the pressure tank “to hold pressure.” That mistake isolates the tank, prevents proper pressure equalization, and hammers faucets and appliances.
From the tank tee forward, your house needs free, unimpeded flow. Check valves belong on the well line before the tee and, if needed, at the pump discharge. Never put them between the tee and your distribution. You’ll trap pressure in the tank, confuse the switch, and kick the submersible well pump on and off in sprints. The Alvarados had exactly this: a hidden check tucked behind a water heater. We pulled it and the whole system calmed down.
When in doubt, simplify. Pumps want steady-state conditions, not checkers on the board.
Diagnosing a Rogue Valve
Close fixture valves and monitor line pressure. If the tank gauge reads steady but faucets sputter or lose pressure quickly, suspect an out-of-place check after the tee. Trace the line and remove it.
Code and Inspection Notes
Most jurisdictions prohibit backflow devices after the tank unless it’s a code-required assembly for cross-connection control. Those are not substitutes for well-side check valves and carry different functions.
Key takeaway: Keep checks on the well side of the tee. The house side should flow freely.
#7. Comparison Reality Check – Why Myers’ Stainless Build and Smart Valve Strategy Outlasts Budget and Mid-Range Brands
In real installs, material and motor pairings dictate how well a check-valved system behaves. Myers’ 300 series stainless steel housings resist corrosion at the valve joints and threads, keeping seals true. Pair that with the Pentek XE motor—built for high-thrust, efficient starts—and your check valves don’t get shocked by harsh torque spikes. Contrast this with budget submersibles that use thermoplastics and lower-tolerance bearings. Their checks work overtime to mask motor bounce and start-stop chatter.
Practically, a stiff, precision assembly makes each close of the check valve predictable. The Predator Plus’ tight tolerances mean fewer micro-leaks, so the system holds pressure overnight without “mystery” half-PSI drops that trip the switch at 2 a.m. The Alvarados’ previous Red Lion pump fought those tiny reversals constantly; after upgrading to Myers, the 45/65 switch settings hold rock solid, with restarts only when someone actually uses water.
For rural homes where uptime is life, a stainless Predator Plus with proper valve placement is simply steadier, gentler on wiring, and quieter in the basement—worth every single penny.
Why Construction Matters at the Valve
A stainless discharge bowl and threads keep the check valve square and sealed long term. Plastic seats deform; stainless holds alignment. That alignment is the difference between no cycling and night cycling.
Efficient Starts Reduce Slamming
The Pentek XE motor comes up to speed smoothly, so the check valve sees a clean pressure ramp, not a spike. That protects seals and extends life on both valves and switch contacts.
Key takeaway: Put better hardware behind smart valve placement and the whole system stabilizes.
#8. Contractor vs DIY – When to Call PSAM for a Myers Kit and Hands-On Sizing Help
Check valve placement lives or dies on accurate TDH and flow numbers. If you’re not comfortable measuring static level, counting elbows, and reading a pump curve, call us at PSAM. We’ll spec a Predator Plus Series package that includes the right check strategy, pipe, and fittings matched to your well.
We sized the Alvarados at 1 HP based on 185 ft set depth, 12 gpm household peak, and conservative friction loss through a single pitless adapter and gentle house-side layout. Their new Myers holds 10–12 gpm at fixtures without outrunning the aquifer, and the 3-year warranty coverage gives them peace of mind. We shipped same day, and they were back showering by dinner.
DIYers can do it—just don’t guess at valve count or location. One at the pump discharge, one at the tank tee if needed, none after the tee. Simple, proven, quiet.
Rick’s Checklist for DIY Installs
- Confirm static level and set depth; calculate TDH. Choose the right HP and staging from the Predator Plus pump curve. Plan for a discharge-side check and optional house-side check; no doubles near the tee. Use quality stainless/brass components and correct thread sealants.
When Professional Help Pays
If your water has grit, the well is over 220 feet, or you’ve had repeated hammer, let us size it. We’ll match a 2-wire well pump or control scheme to your layout and set your check valves right the first time.
Key takeaway: Get the plan right, install once, and enjoy quiet, durable service.
Detailed Competitor Comparisons
In the real world, check valve strategy is only as good as the pump it supports. Here’s where Myers distinguishes itself in ways that matter.
Comparison 1 – Materials, Motors, and Valve Behavior (Myers vs Franklin Electric) Franklin Electric builds solid equipment, but many of their submersibles rely on proprietary control boxes and dealer channels. Myers packages a high-thrust, efficient design with the Pentek XE motor and field-friendly serviceability. On the water side, 300 series stainless steel construction keeps the valve threads true, preventing seeping at the check that leads to cycling. Hydraulic efficiency at the Predator Plus’ BEP means fewer starts per day at the pressure tank, protecting the switch and valves. In installs where I’ve replaced comparable Franklin models with a Myers https://www.plumbingsupplyandmore.com/submersible-well-pump-rustler-series-1-stage-1-2-hp-8-gpm.html Predator Plus, the check valve closure becomes notably quieter thanks to the smoother motor ramp and tighter discharge alignment. Translation: fewer callbacks and longer switch life.
For homeowners, that means simpler installs, less dependence on dealer-only parts, and a pump that maintains pressure overnight without “twitch restarts.” Add PSAM’s parts support, and the total package is worth every single penny.
Comparison 2 – Durability and Hammer Control (Myers vs Red Lion) Red Lion’s thermoplastic housings and lighter components struggle under long vertical columns and frequent pressure cycling. In practice, I’ve seen plastic seats deform slightly at the discharge, which forces the check valve to absorb harsh reversals. The Predator Plus’ stainless bowl threads and rigid body minimize micro-movement at shutdown, so the check valve closes consistently without chattering. Couple that with a properly placed discharge-side valve and, if needed, a single house-side valve, and hammer noise fades. Where Red Lion systems I’ve serviced often last 3–5 years with nuisance cycling, a Myers configuration routinely delivers 8–15 years, especially when paired with clean water and a right-sized GPM rating.
When you depend on your well daily, replacing valves and pumps every few years is false economy. A quiet, stainless Myers build with smart check placement is worth every single penny.
FAQ: Myers Pump Check Valves, Sizing, and Long-Term Reliability
1) How do I determine the correct horsepower for my well depth and household water demand?
Start with your TDH: add vertical lift from water level to discharge pressure, plus friction loss from fittings and pipe. Then size horsepower from the Myers Predator Plus pump curve that meets your target GPM rating at that TDH. For example, a 1 HP Predator Plus typically handles a 180–220 ft set depth at 8–12 gpm for a typical 2–3 bath home. If you irrigate or fill troughs, consider stepping to 1.5 HP or staging up. Rick’s rule: choose the smallest HP that reliably meets peak demand at your TDH—oversizing can short-cycle the pressure tank. At PSAM, we’ll gather static water level, set depth, pipe size, and fixture count to dial it in. For the Alvarados’ 185 ft well, a 1 HP matched their daily use perfectly with headroom for the garden spigots.
2) What GPM flow rate does a typical household need and how do multi-stage impellers affect pressure?
Most single-family homes are comfortable at 8–12 gpm. Showers, dishwasher, and laundry can overlap without starved fixtures. Multi-stage designs in the Predator Plus Series stack impellers to build pressure efficiently, so you hit your gpm target without stressing the motor. More stages don’t mean more water—they mean the pump sustains pressure at higher heads. For a two-bath ranch at 150–200 ft, a 10 gpm rated pump is plenty. For homes with irrigation, consider a 12–15 gpm target or a dedicated booster. Myers’ staging keeps pressure steady so check valves close gently at shutoff, reducing water hammer.
3) How does the Myers Predator Plus Series achieve 80% hydraulic efficiency compared to competitors?
Two keys: precision-tuned impeller geometry and tight tolerances in a 300 series stainless steel body. The Pentek XE motor delivers torque efficiently to the stack, minimizing slip and heat. In field installs, that means fewer starts per day, cooler operation, and gentler check valve closures. At or near the pump’s BEP, you’ll save up to 20% in running costs over less efficient builds. Efficiency also stabilizes pressure so the valve isn’t constantly flirting with closure, which extends valve and switch life. In my jobs, Predator Plus units consistently hold overnight pressure with minimal drift.
4) Why is 300 series stainless steel superior to cast iron for submersible well pumps?
Submerged metal fights corrosion constantly. 300 series stainless steel resists pitting, thread galling, and mineral adhesion far better than cast iron. That matters where check valves thread into the discharge bowl—threads stay square and leak-free longer. It also matters for maintaining alignment of the impeller stack and the threaded assembly during service. Stainless doesn’t swell or flake rust that can foul an internal check valve seat. Result: clean seals, quieter closures, and a pump that maintains factory performance longer, especially in water with aggressive pH or mineral content.
5) How do Teflon-impregnated self-lubricating impellers resist sand and grit damage?
Myers’ engineered composite impellers with Teflon additives keep a lubricious boundary at the wear surfaces. Grit that would score metal or cheaper plastics tends to slide with less cutting action. That reduces axial load and keeps clearances tight. Tight clearances mean the pump holds pressure efficiently, so the check valve sees a predictable shutoff. In mild sand conditions, I pair this with a screened intake and a discharge-side stainless check; the combination maintains flow without abrasive chatter at closure. Field note: the Alvarados’ new Predator Plus shrugged off their fine silt that had eaten the last pump’s stages.
6) What makes the Pentek XE high-thrust motor more efficient than standard well pump motors?
The Pentek XE motor delivers higher thrust capacity and better electrical efficiency under load, with thermal protection built in. On start, it reaches speed smoothly, reducing the pressure spike that can bang a check valve shut. Under steady state, lower watt draw reduces heat, which protects windings and prolongs bearing life. Efficient starts and runs translate to fewer nuisance trips at the pressure tank and longer switch contact life. In my experience, that smoother electrical profile is the unsung hero in quiet, long-lived valve behavior.
7) Can I install a Myers submersible pump myself or do I need a licensed contractor?
Plenty of capable DIYers install successfully with PSAM guidance. You’ll need to handle drop, align the pitless adapter, make waterproof splices, and set the check valve correctly. If your well is over 200 feet, water has grit, or the electrical run is long, consider a licensed pro. Either way, we’ll size the pump, verify the GPM rating and TDH, and specify exactly where to place your valve(s). The Alvarados handled their house-side piping themselves; a local contractor pulled and set the pump. Smooth partnership, great result.
8) What’s the difference between 2-wire and 3-wire well pump configurations?
A 2-wire well pump has internal start components and simplifies installation—fewer connections and typically lower upfront cost. A 3-wire variant uses an external control box and can be advantageous for serviceability in certain scenarios. Myers offers both, with the Predator Plus line delivering reliable starts either way. For most residential installs up to 1.5 HP, 2-wire is my first pick due to simplicity and fewer enclosure points. Regardless of configuration, check valve placement rules don’t change: discharge-side first, optional house-side second, no valves after the tank tee.
9) How long should I expect a Myers Predator Plus pump to last with proper maintenance?
With correct sizing, clean electrical supply, and smart valve placement, expect 8–15 years. I’ve seen well-cared-for units pass 20 years. Maintenance includes annual pressure checks, periodic tank air charge verification, inspection of the house-side check valve, and water quality testing for sand and minerals. The 3-year warranty gives you a strong starting window. Most premature failures I’m called to fix come down to mis-sized pumps, poor valve placement, or electrical issues—not the pump itself.
10) What maintenance tasks extend well pump lifespan and how often should they be performed?
- Annually: Verify tank pre-charge (2 PSI below cut-in), test system for overnight pressure hold, and inspect the house-side check valve operation. Every 2–3 years: Check wiring connections, examine the pitless adapter seal, and sample water for sand/iron. After any hammer event: Inspect fittings and support your vertical run to prevent flex. Replace suspect valves early. These simple steps protect impellers, motors, and valves—cheap compared to a pull-and-replace.
11) How does Myers’ 3-year warranty compare to competitors and what does it cover?
The Myers 3-year warranty beats many brands that stick to 12–18 months. It covers defects in materials and workmanship, including performance issues tied to manufacturing. It doesn’t cover abuse—like running dry or freezing—but with proper configuration, that’s rarely a concern. The longer coverage aligns with the Predator Plus’ engineering: 300 series stainless steel, robust staging, and top-tier motor assemblies. The Alvarados appreciated that runway and the PSAM support that comes with it.
12) What’s the total cost of ownership over 10 years: Myers vs budget pump brands?
Run the math. A budget pump might be $300–$500 cheaper up front. But if it lasts 3–5 years, you’ll likely buy two or three in a decade—plus pay for at least one emergency install. Add higher energy costs from lower efficiency and the check valve turbulence that beats up your switch. A Predator Plus running near BEP with smart valve placement can cut operating costs 15–20% and avoid mid-decade replacements. With PSAM’s sizing help, faster shipping, and better hardware, a Myers system pays back with quieter operation, fewer service calls, and true longevity.
Conclusion: Simple Check Valve Rules. Premium Myers Hardware. Reliable Water, Every Day.
Here’s the short list you can trust:
- Put one high-quality check valve at or within 1–2 feet of the pump discharge. Add a single, optional house-side valve before the pressure tank tee—never after the tee. Avoid stacking checks near each other; space them (pump and house) or don’t use the house-side at all. Size from TDH and the pump curve, then let the Predator Plus Series do its job efficiently. Use 300 series stainless steel and a Pentek XE motor for quiet starts and predictable valve closures.
Miguel and Amaya Alvarado went from nightly cycling and hammer to quiet, steady water—and a system they trust. With PSAM’s field-tested guidance and Myers’ engineering, you’ll do the job once, do it right, and enjoy the kind of reliability that’s worth every single penny.