Description
Modular cartridge media filter for residential pools and spas, designed to remove debris and suspended particles from pool water. The compact, small-diameter housing fits new or retrofit installations for in-ground and above-ground pools and in-ground hot tubs. Balanced flow and advanced media technology provide higher dirt-loading capacity than comparable sand filters, reducing cleaning frequency and routine maintenance.
Quick Answer: What Is the Sta-rite PLM300?
The Sta-rite PLM300 is a cartridge pool filter: Sta-Rite System 2 PLM 300 sq-ft 150 gpm Modular Cartridge Filter In-Ground/Above Ground Residential. It is brand new, ships in 1-2 business days, and is backed by the Sta-rite manufacturer warranty.
Sta-rite PLM300 Specifications
| Brand | Sta-rite |
|---|---|
| Equipment Type | Cartridge Pool Filter |
| Model Number | PLM300 |
| Cartridge Type | Modular |
| Effective Filtration Area | 300 sq ft |
| Pool Type | In-Ground |
| Commercial or Residential | Residential |
| Product Line | PLM |
| UPC | 022315309838 |
Key Features
- Cartridge media design for efficient particle removal
- Balanced flow design for reduced maintenance
- Shallow pleat cartridge for greater dirt-holding capacity
- Two-piece thermoplastic tank for corrosion resistance
- Compact footprint for new and retrofit installations
How It Works
The filter removes dirt and debris from the water the pump circulates. Cartridge filters trap particles in pleated fabric, sand filters use a bed of media that is cleaned by backwashing, and D.E. (diatomaceous earth) filters coat grids or fingers with D.E. powder for the finest filtration. The filter must be sized for the pump's flow rate and the pool's volume.
How to Choose the Right Cartridge Pool Filter
- Size the filter to the pump flow rate (GPM) and pool volume; most pros oversize the filter for longer cleaning intervals.
- Match port size and valve style (top mount, side mount, multiport or push-pull).
- Compare filter area: square feet for cartridge and D.E. filters, square feet of bed area for sand filters.
- Consider maintenance preferences: cartridges are hosed off, sand and D.E. filters backwash.
- Check whether the tank, valve, media or cartridges are included.
If you are replacing an existing part, the fastest way to confirm compatibility is to match the brand and model number on the old equipment. Send us the model number or a photo of the label and our team will help confirm the PLM300 is the right fit before you order.
Installation and Safety
Install the filter on a level pad after the pump and before the heater and sanitizer. Use the correct pipe size, observe the maximum working pressure, and install the air relief and pressure gauge. Always release pressure before opening a filter tank; a tank or clamp that is opened under pressure can cause serious injury.
Maintenance Tips
- Note the clean starting pressure; clean or backwash when the gauge rises 8-10 psi above it.
- Hose off cartridges regularly and replace them when pleats are damaged or flattened.
- Replace sand every few years and recharge D.E. after every backwash.
- Inspect O-rings and the clamp band for wear.
What's Included
This listing is for the Sta-rite PLM300 as described in the specifications above. Plumbing, wiring, unions and accessories are not included unless they are listed in the product name or specifications.
Built for Homeowners, Pool Pros and Property Managers
- Homeowners: match your existing model number, then reach out if you want a second set of eyes on compatibility before you order.
- Pool service pros and builders: order quickly, track every shipment, and reorder common parts for your routes and builds.
- Property managers and commercial pools: standardize equipment across properties and plan replacements with help from our team.
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Frequently Asked Questions About the Sta-rite PLM300
Which filter type is best?
D.E. filters the finest particles, cartridges offer good filtration without backwashing, and sand is simple and durable. The best choice depends on your pool, water restrictions and maintenance preferences.
How often should I clean my filter?
When pressure rises 8-10 psi over clean pressure, or as the manufacturer recommends.
Can I upsize my filter?
Yes, a larger filter usually improves clarity and extends cleaning intervals, as long as plumbing and space allow.
Is this the genuine Sta-rite part?
Yes. It is brand new Sta-rite equipment (model PLM300) covered by the manufacturer warranty. Warranty terms vary by product and application; see the manufacturer documentation or ask our team.
