# PiTec Substrate System Nitrate

> MAUNAWAI nitrate protection filter for PiTec under-sink system. Effective protection as additional pre-filter. Upgrade now.

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[https://www.maunawai.com/gb/en/p/buy/pitec-foundation-system-nitrate](https://www.maunawai.com/gb/en/p/buy/pitec-foundation-system-nitrate)