Pentair WC9-3 O-Ring Replacement for Select Sta-Rite Pool/ Spa Cartridge Filters

Ensure a tight, leak-free seal for your filtration system with the Pentair WC9-3 O-Ring Replacement, a high-quality cartridge filter o ring designed for long-lasting performance in pool and spa environments. Built for reliability, this replacement O-ring helps maintain proper pressure while preventing water and air leaks that can reduce filtration efficiency.

Wide Compatibility

• Compatible with Sta-Rite Posi-Flo II pool and spa cartridge filters
• Fits models PTM50, PTM70, PTM100, and PTM135 series
• Also fits Sta-Rite pool and spa filter separation tank assemblies
• Ideal for routine maintenance and system repairs

Hassle-Free Installation

• Easy to replace with no special tools required
• Creates a secure, watertight seal
• Helps prevent water leaks, air intrusion, and pressure loss
• Supports smooth and efficient pool or spa operation

Durable & Reliable Construction

Manufactured from stable, flexible material, this filter element cartridge with o-ring is built to withstand constant water exposure, pressure changes, and regular use. Its durable design ensures consistent sealing performance and extended service life.

Key Features

• Flexible and super durable material
• Reliable O-ring replacement for cartridge filters
• Helps prevent water and air leaks
• Compatible with pool and spa cartridge filter systems
• Fits Sta-Rite pool and spa filters

Product Specifications

• Category: Filters
• Part Number: WC9-3
• Type: O-Ring
• Color: Black

Upgrade or replace your worn seal with confidence using the Pentair WC9-3 cartridge filter o ring, a dependable choice for maintaining optimal pool and spa filtration performance.