Pentair Spa/Pool Replacement Filter Cartridge (R173435)

Type:	Filters
Mfr	Pentair Pool Products
Mfg Part #	R173435
Hzn Part #	_R173435
Replaces:	403351
Top Style:	Open
Top Dimension:	2-1/8"
Bottom Style:	Open
Bottom Dimension:	2-1/8"
Length:	20-1/8"
Square Feet:	75
Outside Diameter:	5"
Works With:	Rainbow/Pentair Dynamic RCF, Dynamic RTL

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TAGS: filters, pentairpool

Details

(DISCONTINUED BY MANUFACTURER)

SEE REPLACEMENT PART: OBSOLETE

Pentair Spa/Pool Replacement Filter Cartridge (R173435) is a replacement spa or pool filter cartridge from Pentair Pool Products designed to help restore clean water flow through compatible filtration systems. It is suited for maintenance replacements where the cartridge model, cross-reference number, length, diameter, end-cap style, and core design need to match the existing filter. Use part number R173435 when matching this item to an existing component, owner’s manual, parts diagram, or service record. A fresh cartridge can improve circulation, reduce strain on the pump, and help keep water clearer when paired with proper cleaning and chemistry.

Before ordering, compare all printed cartridge codes and physical dimensions to the filter being replaced. Many cartridges look similar, but small differences in end caps, thread style, opening size, or overall length can affect fit. Replace worn, collapsed, cracked, or heavily soiled cartridges promptly to maintain efficient filtration.

Genuine or listed Pentair Pool Products replacement option for Filters applications
Compare cartridge length, diameter, end caps, core, and cross-reference numbers before ordering
Useful for repair, rebuild, routine maintenance, or replacement service
Compare size, voltage, color, connection type, and model details before ordering
Professional installation is recommended whenever electrical, gas, pressure, or code-sensitive work is involved

Pentair Pool Products – Pool Pumps, Filters, Heaters, Automation Systems and Parts

Who is Pentair Pool Products?

Pentair Pool Products is a global leader in pool and spa equipment, known for innovative, high-performance solutions used in residential and commercial pools. With decades of industry leadership, Pentair has built a reputation for engineering excellence, reliability, and energy-efficient technology. Their equipment is widely trusted by pool professionals and homeowners for maintaining clean, safe, and efficient pool systems.

What products does Pentair Pool Products specialize in?

Pentair specializes in a full range of pool and spa equipment, including pool pumps, filters, heaters, automation systems, cleaners, lighting, valves, and replacement parts. Their product lineup features industry-leading technologies such as variable speed pumps, cartridge and sand filtration systems, gas heaters, salt chlorine generators, and smart pool automation controls. These products are designed to optimize water circulation, filtration, and overall system performance.

Why choose Pentair Pool Products parts for your pool or spa?

Pentair products are known for durability, energy efficiency, and advanced technology. Their equipment is engineered to reduce energy consumption, improve water quality, and extend the lifespan of pool systems. Pool owners and professionals choose Pentair for reliable, high-performance solutions that simplify maintenance and lower operating costs.

How do you identify and choose the correct Pentair Pool Products part?

To select the correct Pentair part, it’s important to match your equipment model, part number, and system specifications such as horsepower, filter type, or connection size. Reviewing product manuals and compatibility ensures proper fit and performance. Choosing the right part helps maintain system efficiency and prevents costly issues.

Need help finding the right Pentair Pool Products part?

At Bath & Spa Parts Online, we carry a wide selection of Pentair Pool Products pool, spa, and bath parts ready to ship. Can’t find what you need? Contact our Product Specialists at 800-918-9143, use the live chat, or visit our Contact Us page. For installation guides, part diagrams, and troubleshooting resources, visit the Bath & Spa Parts Online Knowledge Base for expert support.