iFilters RP-3500 Carbon Block Filter Cartridge — 0.5 Micron, 1000 GPD, Frescapure 3500 Compatible

Upgrade your home's water filtration with the iFilters RP-3500 carbon block cartridge. Specifically designed to replace the Royal Prestige Frescapure 3500 and similar models, it offers a seamless fit and consistent filtration performance for everyday use. From the first morning coffee to the last rinse of the day, this cartridge works to maintain water that looks and tastes fresher, with fewer off notes and a cleaner mouthfeel.

Built with high purity coconut shell activated carbon, the RP-3500 delivers filtration without added chemicals or fillers. Its advanced 0.5 micron filtration targets a broad spectrum of common contaminants, helping reduce substances that can affect taste, odor, and clarity. With a daily capacity up to 1,000 gallons, it supports a busy household without frequent cartridge changes, making it a practical choice for family kitchens, homes with guests, or home offices.

What you gain

• Reduced lead and other heavy metals that can influence flavor and safety of tap water
• Lower levels of cysts and sediment for clearer, brighter water in every glass
• Smaller particulates and VOCs that can cause off tastes or odors in beverages
• Better chlorine reduction for a crisper finish in beverages, ice, and shower water

In everyday use, you may notice water that feels softer on the tongue and tastes more consistent across different sources, whether you’re brewing coffee, making tea, or filling a pitcher for the family. The coconut shell carbon filtration is designed to work naturally with your water supply, avoiding additives while maintaining strong filtration performance.

Easy installation and maintenance

• Tool-free replacement — swap the cartridge without extra tools, reducing downtime
• Designed for a secure, snug fit with compatible Frescapure 3500 models, ensuring reliable filtration
• Replace on a roughly 12-month schedule based on water quality and usage

To get the most from your RP-3500, simply remove the old cartridge and install the new one, then run a short flush to clear any loose carbon particles. You’ll likely notice immediate improvements in taste and clarity as the system stabilizes.

Specifications at a glance

• Filtration: 0.5 micron coconut shell activated carbon
• Capacity: up to 1,000 gallons per day
• Compatibility: Frescapure 3500 and WF0451 models
• Materials: high purity carbon for filtration without additives