1 Year Replacement Cartridges for WP 4V Watts Premier 4 Stage RO System (500109). System sanitizer packet included. These high capacity filters deliver finer filtration and only need to be changed once per year – save time and money compared to the Watts Premier 6 month filters!

The Premiere RP-WP4VROS water filter kit is the preferred replacement filter kit for the Watts WP-4V reverse osmosis system! Our premium filters have a longer filter life which means they only need to be changed once per year (Watts Premier filters need to be replaced every 6 months). The 1 micron grooved sediment filter and 0.5 VOC carbon filter deliver finer filtration too – Watts’ filters are only 5 micron and 1 micron respectively. Plus, we include a packet of system sanitizer which works in 60 seconds to kill 99.9% of harmful bacteria in your RO system.

RP-WP4VROS Annual WP-4V VOC Filter Kit Benefits

• 1 micron premium grooved filter cartridge removes ultra fine sediment, sand, dirt, silt, rust, and other small particles
• 0.5 micron volatile organic compound (VOC) coconut shell carbon block filter reduces chlorine, chloramine, cysts, sand, rust, sediment, and more. Coconut shell carbon block is a sustainable, renewable resource.
• The ideal replacement water filter cartridges for reverse osmosis pre- and post- filtration
• Prevents the premature fouling of your reverse osmosis membrane
• These high capacity water filters only need to be changed once per year – save time and energy compared to the Watts Premier bi-annual filter kit which needs to be replaced every 6 months
• Made in the USA – be sure about where your water filters are made! Don’t settle for low-grade, imported carbon products
• Tested to NSF standards – NSF International, one of the most respected independent certification organizations,  rigorously tests products to comply with all standard requirements
• Protect your health: All reverse osmosis systems should be sanitized at least once a year. The included Sani-System ® packet works in 60 seconds to kill 99.9% of harmful bacteria. This handy, effective packet also eliminates messy measuring and mixing chemicals. It’s the only EPA and NSF approved sanitizer in the industry!

Replacement water filter kit for Watts WP-4V system includes:

• (1) 1 micron advanced, rigid-grooved filter (up to 10+ times the life of other filters with the increased surface area!)
• (1) 0.5 micron volatile organic compound (VOC) coconut shell carbon block filter
• (1) One Sani-System liquid sanitizer packet

Superior alternative to Watts Premier item WP500124

Don’t forget to replace your RO membrane every 2 years!

Here’s the 50GPD upgraded replacement membrane for Premiere and Watts Premier water filtration systems: F110009

It’s important to replace your RO membrane regularly to ensure the system continues to function at its best, and water isn’t wasted…the older the membrane, the more water that’s used during the purification process.

The RO membrane is the core of your reverse osmosis system. It has a pore size of 0.0001 micron and effectively reduces TDS (total dissolved solids) and sodium, as well as contaminants such as aluminum, arsenic, barium, bicarbonate, borate, bromide, cadmium, calcium, chloride, chromate, chromium, copper, cyanide, detergent, ferrocyanide, flouride, herbicides, nitrate, polychlorinated biphenyl (PCBs), perchlorate, phosphate, potassium, radium, selenium, silicate, silver, spores, strontium, sulfate, thiosulfate, zinc and more.