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In-Line Water Filters


  • What filter should be used to add an in-line water filter to a Sub-Zero?
  • Where do I order a replacement in-line water filter?
  • How do I know if there is an in-line water filter installed on a Sub-Zero?
  • Who should add an in-line water filter?
  • How do I know when to replace an in-line water filter?
  • How do I replace an in-line water filter?
  • Can you retrofit a water filtration system on models without filtration?
  • Do Sub-Zero units have a water filtration system add-on?


Sub-Zero does not support nor sell in-line water filters.

  • Contact a local plumber to discuss options for installing an in-line water filter.
  • Sub-Zero does not have a water filtration system available for models without a water filtration system.
  • In-line filters can have different locations depending on the home, and where the plumber installed the filter.
    • Possible locations include under the unit, in an adjacent cabinet, under the sink, or in the basement.
  • Customers should check local hardware or home improvement stores for replacements.
  • At minumum, in-line water filters must provide a constant water pressure of 20 psi (1.4 bar) to 100 psi (6.9 bar) to the Sub-Zero at all times.
    • Depending on the model, water pressure ranges are either 20-100 psi or 35-120 psi.

Refer to the product Installation Guide for further installation information, including unit psi requirements.

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