Pentair MasterTemp or Max-E-Therm Not Lighting? How to Tell If the Igniter Is Bad (77707-0054)
If your Pentair MasterTemp or Sta-Rite Max-E-Therm runs its blower but never fires, the igniter is one of the first parts to check. Here is how to test the 77707-0054...
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What Size Hayward H-Series Gas Pool Heater Do You Need? (W3H135FDN vs W3H150FDN vs H400FDN)
A plain guide to sizing a Hayward Universal H-Series gas pool heater. Covers the BTU math, which model fits which pool, gas line requirements, and when to step up to...
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Pool Filter Air Relief Valve Leaking or Stuck? How to Fix It (Replaces Pentair 98209803)
A leaking or clogged air relief valve is one of the cheapest pool filter problems to fix. Here is how to spot a bad valve, what causes it, and how...
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Sand Blowing Back Into Your Pool? Hayward Sand Filter Troubleshooting (W3S270T2)
Sand showing up on your pool floor usually means a cracked lateral, a worn spider gasket, or the wrong grade of media in the tank. Here is how to find...
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IntelliChlor Showing a Flow Error With the Pump Running? How to Test the 520736 Flow Switch
A Pentair IntelliChlor that reports no flow while the pump is clearly running usually has a bad flow switch, not a bad cell. Here is how to test it and...
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Pressure-Side Pool Cleaner Not Moving? How to Tell If the Booster Pump Is Bad (Pentair 360526)
A pressure-side cleaner that sits still or barely crawls is usually a booster pump problem, not a cleaner problem. Here is how to test the pump, what commonly fails, and...
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Pentair Kreepy Krauly Rebel Not Moving? Common Causes and Fixes (360486)
If your Pentair Kreepy Krauly Rebel has stopped moving or keeps stalling in one spot, the cause is usually low suction or worn internal parts. Here is how to check...
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How to Upgrade a Pentair IntelliCenter i5P to i10PS (521873Z)
Adding a spa or running out of relays on a Pentair IntelliCenter i5P? Here is what the i10PS upgrade involves, which part you need, and how the swap works.
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Water Pooling Under Your Hayward Max-Flo? When the SPX2300AA Strainer Housing Needs Replacing
Water under a Hayward Max-Flo pump usually traces back to one of four spots. Here is how to tell when the SPX2300AA strainer housing is the real problem, what causes...
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Hayward AquaTrol Not Making Chlorine? Troubleshooting Guide (W3AQ-TROL-RJ)
Your Hayward AquaTrol is running but the water still tests at zero chlorine. Here are the real reasons an AquaTrol stops generating, how to check each one, and when the...
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Pentair IntelliTouch i5+3 vs. i9+3: Which Personality Kit Do You Need? (521219 vs 521221)
The Pentair IntelliTouch i5+3 (521219) and i9+3 (521221) personality kits do the same job, but they control a different number of circuits. Here is how to pick the right one...
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Pool Pump Basket Cracked or Collapsing? How to Replace a Pentair 355667 Large Pump Basket
A cracked or collapsed pump basket lets debris reach your impeller and can cost you a lot more than the basket did. Here is how to spot a bad Pentair...
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Hayward TriStar or EcoStar Pump Housing Cracked or Leaking? How to Replace the SPX3200A
If water is running out of the pump body itself and not the seal or the lid, the housing is cracked. Here is how to check it, and how the...
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What Size Hayward HeatPro Heat Pump Do You Need? (50K vs 90K vs 140K BTU)
Picking a Hayward HeatPro heat pump comes down to pool size, how warm you want the water, and how fast you want it to get there. Here is a plain...
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Pentair Kreepy Krauly Rebel Not Moving or Losing Suction? Causes and Fixes (360486)
If your Pentair Kreepy Krauly Rebel stops moving or will not climb walls, the cause is usually suction, the hose, or a worn cleaner head. Here is how to check...
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What Size Pentair Clean & Clear Plus Filter Do You Need? (160340 vs 160301 vs 160332)
A plain guide to picking between the 320, 420, and 520 sq ft Pentair Clean & Clear Plus cartridge filters. We cover pool size, pump flow, cleaning frequency, and when...
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