Most Common Pool Filter Parts That Need Replacing: DE, Sand, and Cartridge Filters

Pool filters are vital for maintaining clean, healthy water in your swimming pool. Over time, the components in your filter can wear out due to regular use, water chemistry, and environmental factors. Knowing which parts require regular replacement ensures your filter runs efficiently, prolongs its lifespan, and keeps your pool crystal clear.

In this guide, we’ll explore the most common parts that need replacing for DE filters, sand filters, and cartridge filters. We’ll also discuss how often these replacements are necessary, why they’re important, and provide links to trusted products available in-store or online.

Why Replace Pool Filter Parts?

Replacing pool filter parts is essential because worn-out components can:

• Decrease filtration efficiency
• Increase energy consumption
• Cause water clarity and balance issues
• Lead to costly repairs if left unaddressed

By understanding the most commonly replaced parts and their maintenance schedules, you can avoid these issues and keep your pool in top condition.

DE Pool Filters: Common Replacement Parts

Key Parts to Replace in a DE Filter

• Filter Grids or Grid Assembly
  Why Replace: DE filter grids can become clogged, torn, or brittle over time due to high-pressure cleaning or chemical exposure.
  How Often: Replace every 5–8 years, or sooner if damaged.
  Pentair FNS Plus DE Filter Grid Pack
• Manifold Assembly
  Why Replace: The manifold directs water flow inside the filter. Cracks or damage can disrupt filtration.
  How Often: Inspect annually; replace as needed.
  Pentair FNS Plus Manifold
• Gaskets and O-Rings
  Why Replace: These seals prevent leaks. Over time, they can crack or lose elasticity.
  How Often: Replace every 1–2 years or during maintenance.
  Pentair Tank O-Ring Kit
• Backwash Valve
  Why Replace: Worn valves can result in inefficient backwashing or leaks.
  How Often: Replace every 3–5 years or as needed.
  Pentair Slide Backwash Valve

Sand Pool Filters: Common Replacement Parts

Key Parts to Replace in a Sand Filter

• Laterals
  Why Replace: Laterals can crack or clog, reducing water flow and filtration efficiency.
  How Often: Inspect during sand changes; replace every 5–7 years or as needed.
  Pentair Sand Filter Lateral
• Multiport Valve
  Why Replace: This valve directs water flow for filtering, backwashing, and rinsing. Leaks or stiffness signal replacement.
  How Often: Replace every 5–10 years or if damaged.
  Pentair Multiport Valve
• Tank O-Rings
  Why Replace: Worn O-rings can lead to leaks and reduced efficiency.
  How Often: Inspect annually; replace if cracked or worn.
  Pentair Tank O-Ring Kit

Cartridge Pool Filters: Common Replacement Parts

Key Parts to Replace in a Cartridge Filter

• Filter Cartridges
  Why Replace: Cartridges become clogged and less effective with use. Regular replacement ensures proper filtration.
  How Often: Replace every 1–2 years, depending on usage and water conditions.
  Pentair Clean & Clear Cartridge
• Pressure Gauges
  Why Replace: A malfunctioning gauge can misread pressure, leading to improper filter maintenance.
  How Often: Replace every 1–2 years or when faulty.
  Pentair Pressure Gauge

Find Pool Filter Parts at Aqua Pool Supply

At Aqua Pool Supply, we offer a wide range of pool filter parts for DE, sand, and cartridge filters. Whether you’re in Phoenix, AZ, Scottsdale, AZ, or Las Vegas, NV, our team is here to help you find the parts you need to keep your pool in perfect condition.