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Changing FiltersUpdated 12 days ago

Cold Plunge Filter Change Guide | LIT Method

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Cold Plunge Filter Change Guide

Changing your filter on time is the single most important thing you can do to keep your cold plunge running clean, your chiller protected, and your warranty active. This guide covers everything you need to know — how often, how to do it, and what to avoid.

Filter Change Cadence

Your required filter change schedule depends on your use type. Both schedules are warranty requirements — not just recommendations. Only LIT-approved filters purchased through litmethod.com qualify for warranty coverage.

Residential Use
Every 3–4 Weeks
Light use (1–3 plunges per week): replace every 4 weeks. Moderate use (4–7 plunges per week): replace every 3 weeks. When in doubt, change it sooner.
Commercial Use
Every Week
Filters must be replaced every 7 days without exception. The unit must also be fully drained every time the filter is changed — draining and filter replacement always happen together.
Failure to purchase and replace filters through litmethod.com at the required cadence — every 3–4 weeks for residential use or weekly for commercial use — will void your warranty. All replacement filters must be purchased through LIT Method to keep your warranty active.

What You Need Before You Start

Have the following ready before beginning a filter change.

  • A new LIT-approved replacement filter (correct size for your chiller model — see filter shop below).
  • A bucket or drain hose for draining the unit (commercial users).
  • Clean towels or a mat to place under the filter housing.
  • Your chiller model number — found on the label on the side or back of the chiller unit.

Step-by-Step Instructions

Residential Use
01

Power Off the Chiller

Turn the chiller off using the control panel or app before doing anything else. Never change the filter while the chiller is running. Wait 5 minutes after powering off before proceeding.

02

Locate the Filter Housing

The filter housing is located on the side of the chiller unit. It is a cylindrical cap that can be unscrewed by hand. Place a towel underneath before opening to catch any water.

03

Remove the Old Filter

Unscrew the filter housing cap counterclockwise. Pull out the old filter and dispose of it. Do not reuse old filters — they cannot be cleaned and reused.

04

Inspect the Housing

Wipe out the inside of the filter housing with a clean, dry towel. Check for any debris, buildup, or damage. If you notice cracks or unusual residue, contact LIT Method support before proceeding.

05

Insert the New Filter

Insert the new LIT-approved filter into the housing, making sure it is seated correctly and fully inserted. Do not force it — it should slide in smoothly.

06

Replace the Housing Cap

Screw the filter housing cap back on clockwise until hand-tight. Do not overtighten. Check that the cap is fully sealed with no gaps.

07

Power the Chiller Back On

Turn the chiller back on and check for any leaks around the filter housing for the first few minutes of operation. If you notice a leak, power off immediately and reseat the filter cap.

Mark your calendar or set a recurring reminder for your next filter change so you never miss the schedule. Missing the required cadence will void your warranty.
Commercial Use
Commercial units must be fully drained every time the filter is changed. Replacing the filter without draining the unit first will void your warranty.
01

Power Off the Chiller

Turn the chiller off using the control panel or app. Never change the filter while the chiller is running. Wait 5 minutes after powering off before proceeding.

02

Drain the Unit Completely

Connect a drain hose to the drain valve at the base of the tub and direct water to a floor drain or bucket. Open the valve and allow the unit to drain completely before proceeding. Do not skip this step — the unit must be fully drained before the filter is removed.

03

Remove the Old Filter

Locate the filter housing on the side of the chiller unit. Place a towel underneath, then unscrew the housing cap counterclockwise. Remove and dispose of the old filter. Do not reuse.

04

Clean the Filter Housing and Tub Interior

Wipe out the inside of the filter housing with a clean, dry towel. Use this opportunity to wipe down the interior of the tub with an approved cleaning solution. Do not use bleach, abrasive cleaners, or any non-LIT-approved chemicals.

05

Insert the New Filter

Insert a new LIT-approved filter into the housing, making sure it is fully and correctly seated. Replace the housing cap clockwise until hand-tight. Do not overtighten.

06

Refill the Unit

Close the drain valve and refill the tub with clean, fresh water. Ensure the water level meets the minimum fill line before powering on the chiller.

07

Power the Chiller Back On

Turn the chiller back on and monitor for any leaks around the filter housing for the first few minutes of operation. If you notice a leak, power off immediately and reseat the filter cap.

08

Log the Filter Change

Record the date of every filter change and drain. We recommend keeping a maintenance log on-site. This documentation may be requested by LIT Method support in the event of a warranty claim.

Commercial usage guide: 50–70 plunges per week = 1 filter per week. 75–120 plunges per week = 2 filters per week. 120+ plunges per week = 3 filters per week.

Protect Your Warranty

Your filter change habits directly determine whether your warranty remains active. Here is what will void your coverage and what keeps it intact.

Actions That Will Void Your Warranty
  • Using any filter not purchased through litmethod.com or not manufactured by LIT Method.
  • Missing the required filter change cadence — every 3–4 weeks residential, every week commercial.
  • Replacing the filter without fully draining the unit first (commercial use).
  • Leaving stagnant water in the unit between filter changes.
  • Using non-LIT-approved chemicals, cleaners, or water treatments.
  • Running the chiller more than 18 hours per day.
  • Adding ice directly into the tub while the chiller is connected and running.
  • Performing unauthorized repairs or modifications without prior written approval from LIT Method.
What Keeps Your Warranty Active
  • Replacing filters on schedule using only LIT-approved filters purchased through litmethod.com.
  • Fully draining the unit with every filter change (commercial use).
  • Keeping the chiller firmware up to date.
  • Powering the chiller off at night — maximum 18 hours of runtime per day.
  • Maintaining proper water chemistry using only LIT-approved products.
  • Contacting LIT Method support before performing any repairs or modifications.
  • Keeping a maintenance log of all filter changes and drain dates (commercial use).

Shop Replacement Filters

Only LIT-approved filters purchased through litmethod.com maintain your warranty. Check your chiller model label before ordering.

Residential Filters
LIT Purity 10 inch Filter 4 Pack
0.8HP & 1.0HP Chillers
LIT Purity 10" Filter (4 Pack)
$55
Shop Now  LIT Purity 10 inch Filter 4 Pack Subscription
Subscribe & Save
0.8HP & 1.0HP Chillers
LIT Purity 10" Filter (4 Pack) — 90-Day Subscription
$35 / delivery
Subscribe & Save  10 inch Chiller Filters 4 Pack
0.8HP & 1.0HP Chillers
10" Chiller Filters (4 Pack)
$50
Shop Now  5 inch SLIMX Chiller Filter 4 Pack
SLIMX 1HP Chiller Only
5" SLIMX Chiller Filter (4 Pack)
$42
Shop Now 
Commercial Filters
Chiller Filters 8 Pack Commercial
Subscribe & Save
0.8HP & 1.0HP — Commercial
Chiller Filters (8 Pack) — Monthly Subscription
$120 / month
Subscribe  Chiller Filters 12 Pack Commercial Pro
Subscribe & Save
0.8HP & 1.0HP — Commercial Pro
Chiller Filters (12 Pack) — Monthly Subscription
$180 / month
Subscribe 
Not sure which filter fits your chiller? Check your chiller model (0.6HP, 0.8HP, 1.0HP, or SLIMX) on the unit label before ordering. Questions? Call us at (310) 800-1229 or email [email protected].

Questions about your filter or warranty coverage?

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