Product Overview

The Pentair System:2 PLM300 Modular Media Filter | PLM300 is a high-capacity residential pool and spa filter designed to deliver strong filtration performance with a compact equipment-pad footprint.

Featuring 300 square feet of effective filtration area, the PLM300 provides excellent dirt-holding capacity and extended filter cycles for larger residential swimming pools. Its modular media design combines the convenience of cartridge-style filtration with a durable, easy-to-service tank configuration.

The System:2 PLM series is designed for both in-ground and above-ground pool applications and does not require a backwash valve. This helps conserve water while simplifying routine filter maintenance.

Key Features

Genuine Pentair / Sta-Rite System:2 filter

Model PLM300

300 sq. ft. effective filtration area

High-capacity modular media filtration

Designed for residential pools and spas

Suitable for in-ground and above-ground pools

No backwash valve required

Large dirt-holding capacity

Compact equipment-pad footprint

Durable thermoplastic tank construction

Easy-access modular filter element

Designed for efficient water circulation

Compatible with properly sized variable-speed pool pumps

Professional installation recommended

Benefits

High-Capacity 300 Sq. Ft. Filtration: The PLM300 provides a substantial 300 square feet of filter surface area, making it a strong choice for larger residential pools or systems that benefit from longer filtration cycles.

A larger filter area can help:

• Increase dirt-holding capacity
• Reduce cleaning frequency
• Maintain more consistent system flow
• Support longer filtration cycles
• Reduce overall filter maintenance

Actual cleaning frequency will vary depending on pool usage, debris load, environmental conditions, and circulation schedule.

Modular Media Design: Instead of using sand or diatomaceous earth, the System:2 PLM300 uses a removable modular filtration element.

Pool water passes through the media, where suspended dirt and debris are captured before filtered water returns to the pool.

When servicing is required, the element can be removed and thoroughly cleaned without the need for routine backwashing.

This makes the PLM300 an attractive option for customers who want efficient filtration while reducing water loss associated with conventional backwash systems.

Compact Equipment-Pad Installation: One of the advantages of the System:2 design is its relatively narrow tank footprint compared with many high-capacity filters.

This makes the PLM300 suitable for equipment pads where horizontal space is limited while still providing a large filtration area.

Adequate vertical and surrounding service clearance should always be provided so the tank can be opened and the filter element removed during maintenance.

Specifications

Warranty & Compatibility

Important Safety Notice

Pool filters operate under pressure. Always shut off the circulation pump and completely relieve internal pressure before opening or servicing the filter.

Inspect the tank, O-ring, clamps, plumbing connections, and filter element during routine maintenance.

Never attempt to open a pressurized pool filter.

Professional installation is recommended to ensure proper plumbing, hydraulic sizing, equipment clearance, and safe operation.

Customer-Facing Q&A

Q: How large is the PLM300?
A: The PLM300 provides 300 square feet of effective filtration area.

Q: Is this a cartridge filter?
A: It uses a modular cartridge-style media element, allowing it to operate without sand or D.E. powder.

Q: Does the PLM300 require backwashing?
A: No. The System:2 PLM series does not require a traditional backwash valve. The internal media element is removed and cleaned when necessary.

Q: Can this filter be used with a variable-speed pump?
A: Yes. The PLM300 can be paired with a properly sized variable-speed pool pump when the complete plumbing and circulation system are correctly designed.

Q: Is it suitable for an in-ground pool?
A: Yes. The System:2 PLM300 is suitable for residential in-ground pool applications and can also be used in compatible above-ground installations.