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The Spartan unit utilizes a pair of 150gpd membranes. In general though I would suggest not changing the membranes unless there is a specific cause to. They typically last 3-5 years, or sometimes much longer. They don't really get "used up" by the tds, usually the cause for replacement is that they have become damaged by chlorine from the pre-filters not being changed frequently enough. As long as your vigilant with your pre-filters they should last a very long time.
Recommended Installation for this package*
- Stage One - 20" Purtrex 5 Micron Sediment Filter
- Stage Two - 20" MATRIKX CTO 5 Micron Carbon Block
- Stage Three - 20" MATRIKX CTO 0.6 Micron Carbon Block
- Last Stage - DI Resin
Our filter kits feature some of the most widely used and trusted brands in the world Including GE, KX Technologies and Pentek. The 10” filter size is the industry standard and will fit our systems as well as virtually every brand of RO system that uses similar looking carbon blocks. Most of the filters included in our kits are made in the USA, NSF Certified or WQA Gold Seal Certified and Manufactured using FDA-compliant materials.
*This is our recommended filter arrangement and we have found to be the best combination for the most common installations and water conditions. If you have something unique about your water supply or installation please contact customer service and one of our WQA certified water specialists will be able to assist you. Our onsite chat feature is the quickest way to receive advice but we are available to assist via the phone and email as well.