Nature2 M35 Replacement Mineral Cartridge | W28155
Nature2
SKU: W28155
Nature2 W28155 Replacement Mineral Cartridge
Part Number: W28155
Description
The Nature2 W28155 mineral cartridge is designed for use with Nature2 M-Series (M25) in-ground mineral sanitizing systems for pools sized up to 25,000 gallons. This cartridge utilizes copper and silver minerals to assist in controlling bacteria and algae, reduce chlorine demand, and help provide clearer, softer water.
Compatibility & Fitment
- Designed for pools 5,000 to 25,000 gallons when used with a compatible Nature2 M-Series vessel.
- Direct replacement for previous models labeled “Type M-25”.
- Intended for in-ground installations; not for above-ground systems unless explicitly specified.
Features & Specifications
- Mineral sanitizing cartridge containing copper and silver.
- Typical service life: up to six months (one swimming season) under proper operating conditions.
- Marked “W28155” and fits into the M-Series vessel used in Nature2 systems.
Installation Notes
Before installing, ensure the pool water is balanced (pH, alkalinity, calcium hardness). Turn off pump and isolate filtration system. Remove the old cartridge from the mineral vessel, insert the W28155, secure and re-start circulation. Monitor free chlorine to verify reduced demand—typically about 50% less chlorine is required when mineral system is functioning correctly.
Maintenance Tip
Regularly check the pool water every week for chlorine residual, mineral cartridge condition and general water clarity. Replace the cartridge at the six-month mark or sooner if water clarity or sanitizer levels deteriorate. Using the proper mineral cartridge helps extend the swim season with lower chemical use and improved swimmer comfort.
SKU: W28155
Questions about returns? View our return policy.
Hours Of Operation:
Monday - Friday: 7:00 am to 5:00 pm Phoenix Time
Saturday: 8:00 am to 2:00 pm
Sunday: Closed
- We do not ship on Saturday or Sunday.
- Orders totaling more than $300 will require signature confirmation upon delivery.
- We process and prepare orders for shipment within 1 business day. Please note that many other pool supply retailers require 3–5 days of handling time before shipping.
- Orders placed after 1:00 pm Phoenix Time may not be eligible for same-day shipment.
- Expedited shipping options are available at checkout.
Return Policy:
- Products that are received damaged will receive a refund in store credit.
- Most products are eligible for return within 30 days of receipt, except where noted below.
- To initiate a return, please complete an RMA form prior to sending your item back.
- Original shipping costs are non-refundable and will be deducted from the return credit.
- Items returned missing accessories or original packaging, or that are not in the same condition as received, may be subject to a restocking fee of up to 100% depending on the condition of the item upon return.
- Some returns will be charged an automatic 15% restocking fee.
- We are unable to issue refunds for items that have been damaged or rendered inoperable due to installer error.
- Please complete the return form to receive your RMA number and return shipping label.
- Chemical products are not eligible for return under any circumstances.
- The Pentair Colorsync 618031 is not eligible for return.
- Pool cleaners are not eligible for return.
- Opened seals and o-rings are not eligible for return.
- Capacitors are not eligible for return.
- Plastic popup tools are not eligible for return.
- Automation components and circuit boards are not eligible for return.
- If a light is returned due to a reported malfunction and is found to be fully operational upon testing, return shipping costs and a restocking fee will be deducted from the refund.
- Orders refused at the time of delivery will be subject to the original shipping costs being deducted from the refund.
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