Expert Pool Filter Repair Services in Phoenix

Keep Your Pool Water Crystal Clear with Professional Filter Repairs

Your pool filter is the heart of your water quality system, working tirelessly to remove debris, dirt, and contaminants from your pool water. When your filter isn't operating correctly, water clarity suffers quickly, chemicals become less effective, and you may face more serious equipment problems. At McCool's Pools, we've been diagnosing and repairing all types of pool filters throughout the Phoenix area since 2005. Our licensed technicians have the expertise to quickly identify filter problems, provide honest assessments, and deliver quality repairs that restore your filtration system to peak performance.

Comprehensive Filter Repair Services

Cartridge Filter Repair

Cartridge filters are popular for their ease of maintenance and efficient filtration, but they can develop problems that require professional attention. We repair or replace torn or damaged filter cartridges, fix leaking tank o-rings and band clamps, address cracked filter housings, repair broken air relief valves, and resolve pressure gauge malfunctions. Our technicians can also upgrade your cartridge filter with higher-quality replacement cartridges that provide better filtration and longer service life between cleanings.

DE (Diatomaceous Earth) Filter Repair

DE filters provide the finest filtration available but require specialized knowledge to repair correctly. We replace torn or damaged filter grids, repair or replace broken manifolds, fix multiport valve leaks and malfunctions, address cracked filter tanks, replace worn backwash valves, and resolve DE bypass issues that allow powder to return to the pool. We also provide complete filter grid replacements when individual repairs are no longer cost-effective, ensuring your DE filter delivers the superior water clarity it was designed to provide.

Sand Filter Repair

Sand filters are durable and low-maintenance, but they're not immune to problems. We repair leaking multiport valves, replace worn spider gaskets and o-rings, fix broken laterals that allow sand to enter the pool, address cracked filter tanks, repair pressure gauge issues, and service backwash valves that won't seal properly. When sand media becomes channeled or depleted, we can also perform complete sand changes to restore filtration efficiency.

Filter Plumbing Repairs

Sometimes the filter itself is fine, but the plumbing connections need attention. We repair leaking union connections, replace cracked or broken pipes and fittings, fix improperly glued joints, address valve leaks and malfunctions, repair compromised pipe supports, and resolve air leaks that affect filter performance. Proper filter plumbing is essential for maintaining correct water flow and pressure through your filtration system.

Get A Free Quote

Common Filter Problems We Fix

Poor Water Clarity

If your pool water remains cloudy despite proper chemical balance, your filter likely isn't removing particles effectively. This can result from torn filter media, channeled sand, clogged cartridges, or internal bypass issues. We diagnose the specific cause and perform the necessary repairs to restore proper filtration and water clarity.

High or Low Filter Pressure

Filter pressure that's too high indicates clogging or flow restrictions, while pressure that's too low suggests air leaks, broken internal components, or bypass problems. Both conditions prevent proper filtration and can damage other pool equipment. Our technicians use pressure diagnostics to pinpoint the problem and perform targeted repairs.

Filter Leaks

Leaking filters waste water, can damage surrounding equipment and structures, and often indicate seal or tank problems that will worsen if ignored. We repair leaks at unions, tank seals, multiport valves, air relief valves, and tank cracks. Many leak repairs are straightforward and affordable when addressed promptly, but become expensive if delayed.

DE or Sand in Pool

If you see DE powder or sand returning to your pool, internal filter components have failed and need replacement. Broken grids, torn cartridges, or damaged laterals allow filter media to bypass the system and enter your pool. We'll identify which components have failed and replace them to stop the bypass and protect your pool equipment from damage.

Multiport Valve Problems

Multiport valves on DE and sand filters can develop leaks, become difficult to turn, or fail to seal properly in different positions. These problems affect filtration efficiency and can waste water during backwashing. We repair or replace multiport valves, spider gaskets, and internal seals to restore proper operation.

Our Filter Repair Process

Thorough Diagnosis

We start every filter repair with a comprehensive assessment of your entire filtration system. This includes checking filter pressure, inspecting all visible components, testing water flow, examining the filter interior when needed, and evaluating the condition of plumbing connections. This thorough approach ensures we identify all problems, not just the obvious ones, and recommend the most cost-effective solution.

Clear Communication

Before performing any repair work, we explain exactly what we've found, why the problem occurred, what repair options you have, and what each option will cost. We provide honest assessments about whether repair or replacement makes the most sense for your situation. There's never any pressure or confusion—just clear information that helps you make the best decision for your pool and budget.

Quality Repairs

When we repair your filter, we use quality replacement parts designed for your specific filter model and type. Our licensed technicians follow manufacturer specifications and industry best practices to ensure repairs are done correctly and will last. We don't cut corners or use inferior parts that will fail prematurely. Every repair is completed to the same high standard we'd want for our own pools.

Performance Testing

After completing filter repairs, we thoroughly test the system to verify everything operates correctly. We check for proper pressure readings, confirm all seals hold without leaks, verify the filter is removing particles effectively, ensure valves operate smoothly in all positions, and test water flow and clarity. We don't consider the job complete until your filter performs as it should.

Repair vs. Replacement: Making the Right Choice

When Repair Makes Sense

Filter repairs are usually the right choice when the filter tank is in good condition, the problem is limited to specific components, the filter is relatively new, repair costs are reasonable compared to replacement, and the filter is properly sized for your pool. Most seal leaks, broken valves, damaged grids or cartridges, and plumbing issues can be repaired cost-effectively, extending your filter's service life for years.

When Replacement is Better

Sometimes replacement makes more financial sense than repair. This is typically true when the filter tank is cracked or severely corroded, multiple major components need replacement, the filter is very old and likely to need additional repairs soon, repair costs approach or exceed replacement cost, or the current filter is undersized for your pool. We'll always be honest about when replacement is the smarter long-term investment.

Upgrade Opportunities

If your filter does need replacement, this creates an opportunity to upgrade to more efficient or easier-to-maintain equipment. We can discuss options like moving from sand to cartridge filtration, upgrading to larger capacity filters for better water clarity, installing modern multiport valves with easier operation, or adding features like pressure gauges with built-in indicators. These upgrades can improve your pool's performance and reduce maintenance requirements.

Why Choose McCool's for Filter Repair

Expert Diagnosis

With nearly two decades of experience, our technicians have seen and repaired virtually every type of filter problem. This experience means we diagnose issues quickly and accurately, saving you time and money. We understand how different filter types operate and what problems commonly affect each type, allowing us to pinpoint issues that less experienced technicians might miss.

All Filter Types and Brands

Whether you have a cartridge, DE, or sand filter, and regardless of the manufacturer, we have the knowledge and parts access to repair it. We work on Pentair, Hayward, Jandy, Sta-Rite, and all other major brands. Our comprehensive parts inventory and supplier relationships mean we can usually complete repairs quickly without delays waiting for special-order components.

Licensed and Experienced

Our repair technicians are fully licensed and have extensive hands-on experience with pool filtration systems. They understand water chemistry, hydraulics, and equipment operation—not just how to swap parts. This expertise ensures repairs are done correctly and problems don't return. You can trust that your filter is in capable, professional hands.

Fair and Transparent Pricing

We provide upfront pricing before starting any repair work, and we honor our quotes. There are no surprise charges or hidden fees. If we discover additional problems during the repair, we discuss them with you and get approval before proceeding. Our goal is to provide quality repairs at fair prices that protect your investment and keep your pool functioning properly.

Warranty on Repairs

We stand behind our repair work with solid warranties on both parts and labor. If a component we've repaired or replaced fails prematurely, we'll make it right. This warranty protection gives you confidence that your filter repair investment is protected and that we're committed to long-term customer satisfaction, not just quick jobs.

Professional Filter Repair When You Need It

Don't let filter problems compromise your pool's water quality or damage other equipment. McCool's Pools provides expert filter repair services for all types and brands of pool filters throughout the Phoenix area. Our licensed technicians will diagnose your filter problem accurately, explain your options clearly, and complete quality repairs that restore proper filtration and water clarity. With nearly two decades of experience and a reputation for honest, reliable service, we're the filter repair experts Phoenix pool owners trust. Contact us today to schedule filter repair service or to discuss whether repair or replacement is the right choice for your situation.

Schedule Filter Repair

newly installed pool filter and pump equipment