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Looking for a refillable filter cartridge for 4x40" housings? This is it. These refillable cartridges fit the 4x40" housings from many different manufacturers. Fill with our virgin bulk DI resin to save big on your filter cost.
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We currently ship within the US, with more countries coming soon.
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🇺🇸 Ship from USA · On Agora since 2025
$67.91