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Powerful Filtration for Inground Pools
Inground pools require high-capacity filtration systems that can handle larger water volumes and more frequent use. Whether you’re upgrading your current setup or installing a new system, Doheny’s offers a wide selection of inground pool filters designed for performance, durability, and crystal-clear water.
Why Inground Pools Need Specialized Filters
Inground pools often have more complex plumbing, higher flow rates, and larger surface areas than above ground pools. That means they need filters that can:
- Handle higher gallons-per-minute (GPM) flow rates
- Trap fine particles and debris efficiently
- Operate reliably under pressure
- Support long-term, low-maintenance performance
From large sand and cartridge filters to high-efficiency DE systems, we carry filters that meet the demands of any inground pool.
Types of Inground Pool Filters
We offer three main types of filters for inground pools: sand filters, cartridge filters, and DE (diatomaceous earth) filters. Each has its own strengths depending on your pool’s needs.
Inground Sand Filters
Sand filters are a popular choice for inground pools due to their durability and ease of use. They use specially graded sand to trap particles down to 20 microns. These systems are ideal for pool owners who want a reliable, low-maintenance solution.
Ideal Use Cases: Low maintenance setups/budget conscious owners
- Doheny’s Sand Filters & Filter Systems
- Hayward Inground Sand Filter
- Pentair Sand Filters & Filter Systems
Inground Cartridge Filters
Cartridge filters offer filtration down to 5–7 microns and are great for maintaining consistently clean water. They don’t require backwashing, which helps conserve water. Simply remove and rinse the cartridge as needed.
Ideal Use Cases: Easy Maintenance/Water Conservation
Top Picks:
- Doheny’s Cartridge Filters & Filter Systems
- Hayward Cartridge Filters & Filter Systems
- Pentair Cartridge Filters & Filter Systems
Shop Inground Cartridge Filters →
Inground DE (Diatomaceous Earth) Filters
DE filters provide the highest level of filtration—down to 3-5 microns. These systems use a fine DE powder to coat internal grids, capturing even the smallest particles. They’re ideal for pool owners who want the clearest water possible.
Ideal Use Cases: Filtering the finest debris, premium performance
Top Picks:
Choosing the Right Filter Size
The right filter size depends on your pool’s volume and pump flow rate. As a general guide:
- Small inground pools (10,000–15,000 gallons): 100–150 sq ft cartridge or 22" sand filter
- Medium pools (15,000–25,000 gallons): 150–300 sq ft cartridge or 24–27" sand filter
- Large pools (25,000+ gallons): 300+ sq ft cartridge or 30"+ sand filter or DE system
Need help sizing your filter? Call our experts at 800-574-7665 for personalized recommendations. *It is perfectly fine to buy larger filtration systems for smaller pools. More water turnover equals more filtration equals less hassle and more fun.
Filter Accessories & Maintenance Supplies
Keep your inground filter system running at peak performance with:
- Filter media (sand, DE powder, alternative DE)
- Replacement cartridges
- Multiport valves for sand and DE systems
- Filter cleaners and maintenance kits
Shop Filter Media →
Shop Replacement Cartridges →
Frequently Asked Questions
Can I use an above ground filter on an inground pool?
It’s not recommended. Inground filters are built for higher flow rates and larger volumes. Always choose a filter rated for inground use.
How often should I clean or replace my inground pool filter?
Cartridge filters: Rinse every few weeks, replace cartridge every 2–3 years
Sand filters: Backwash as needed or every 1–2 weeks, replace sand as needed or every 5–7 years
DE filters: Backwash and recharge as needed, clean grids 1–2 times per year
What’s the easiest filter to maintain?
Cartridge filters are the easiest—just rinse the cartridge with a hose. No backwashing required.
Filters Guides
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Are you looking for the right pool filter to keep your swimming pool sparkling clean? With so many different types of pool filters available, choosing the right one can be overwhelming to say the least. But don’t stress; this handy pool filter buying guide will help you decide which swimming pool filter is the right one for you. After all, a good pool filter is an essential part of a clean, healthy pool.
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