Here’s how to tell just by looking at it!
Your pool filter is one of the most important components for keeping your water clean and safe, but many homeowners don’t know which type they have. Knowing makes a big difference when it comes to maintenance and water quality.
Here’s a quick guide to identify your filter just by its shape and valves:
DE Filter (Diatomaceous Earth)
Common in residential pools for its high filtration efficiency
Tall, vertical tank often looks like a large capsule
May have a multiport valve or a bump handle on top
Requires adding DE powder after cleaning or backwashing
If your filter needs powder after cleaning, it’s a DE filter. They’re great for capturing fine particles but need regular attention.
Cartridge Filter
Also very common in residential pools low maintenance and energy-efficient
Tall, slim, vertical cylinder
No multiport valve just a drain plug and pressure gauge
Opens with a clamp band around the middle
If there’s no backwash valve, and you rinse it with a hose, it’s a cartridge filter.
Sand Filter
Most often found in commercial pools, but some older home pools use them too
Large round tank—like a barrel
Has a multiport valve on top or side with settings like “Filter,” “Backwash,” “Rinse”
Includes a sight glass and pressure gauge
If you have a valve with multiple settings and a wide body tank, it’s likely a sand filter.
Still not sure? Take a quick photo and send it to us we’ll help you identify it.
At ACORB POOLS we inspect your filter during every weekly service and let you know if it needs cleaning or replacement.
Serving Katy, Sugar Land & Fort Bend
