The Complete Cold Plunge Owner's Checklist (Printable)

The complete cold plunge owner's checklist

Everything you need to build, maintain, and use your cold plunge safely. Print this page or bookmark it — these are the checklists every plunge owner needs.

Pre-build checklist

Before you start building your DIY cold plunge:

• Read the master build guide — DIY Cold Plunge Setup Guide
• Read the safety guide — Cold Plunge Safety
• Check medical clearance — get physician OK if you have any cardiovascular condition
• Choose your vessel — stock tank, chest freezer, or pre-built tub (see comparison)
• Size your chiller — use our chiller guide
• Verify floor can handle 500+ lbs (water + your body weight)
• Verify electrical circuit — 15-amp dedicated circuit with GFCI
• Order all parts — see budget guide for full parts list
• Plan 2 days for build — Saturday for plumbing/wiring, Sunday for testing

Build checklist

During the build:

• Position vessel on level, load-rated surface
• Install bulkhead fittings (drill 1-1/4" holes, seal with food-safe silicone)
• Wait 24 hours for silicone cure
• Add foam board insulation to sides and bottom
• Install insulated cover
• Mount chiller at or below waterline
• Plumb chiller with 3/4" flexible PVC spa hose (never garden hose)
• Install check valve on suction line
• Wire Inkbird ITC-308 (plug into GFCI, plug chiller into "Cooling" outlet)
• Drop temperature probe into water (mid-depth, away from chiller return)
• Mount filter pump on separate loop
• Plumb ozone generator into return line
• Set Inkbird: target temp 50°F, compressor delay 3 min, alarms 55°F/35°F
• Fill with tap water
• Run for 24 hours to verify no leaks
• Test water chemistry with 5-way strips
• Add chlorine residual (1-2 ppm)
• Verify floating thermometer matches Inkbird reading

Pre-session checklist

Before each plunge:

• Verify water temperature with floating thermometer
• Verify water is clear (not cloudy)
• Verify water doesn't smell bad
• Have warm layers ready (robe, beanie, socks)
• Have warm drink ready (tea, broth)
• Have towel laid out
• Phone within reach (charged, emergency contacts set)
• Buddy present (for first 5-10 sessions)
• Drink 16oz of water
• Empty stomach or 2+ hours since eating
• Set timer for planned duration
• Do 2 minutes of pre-entry breathwork

Weekly maintenance checklist

Every week (about 10 minutes total):

• Monday: Test water with 5-way strips. Adjust pH if needed.
• Mon/Wed/Fri: Run ozone generator 30 min (automatic timer)
• Daily: Skim surface debris (if any)
• Sunday: Inspect filter cartridge, hose off if dirty
• Sunday: Verify water temp matches controller reading
• Sunday: Visual inspection of all plumbing for leaks

Monthly maintenance checklist

Once per month:

• Replace filter cartridge
• Vacuum chiller condenser coils (improves efficiency)
• Inspect all power cords for damage
• Test GFCI outlet (press "Test" button, should trip)
• Clean ozone generator injector nozzle
• Lubricate filter pump O-rings with silicone grease
• Inspect tub interior for cracks or biofilm

Quarterly maintenance checklist

Every 3 months:

• Deep clean filter pump housing
• Inspect bulkhead fittings for leaks
• Replace ozone generator tubing (silicone degrades over time)
• Verify chiller performance (cooling time from 60°F to 39°F)
• Review and update your plunge log

Annual maintenance checklist

Once per year:

• Replace ozone cell (output drops to 60-70% after 12-18 months)
• Full drain, deep clean, and refill
• Inspect and re-seal all plumbing connections
• Replace any worn or cracked hoses
• Re-calibrate Inkbird ITC-308 against floating thermometer
• Update your emergency contact list

Drain and refill checklist

Every 4-6 months:

• Turn off and unplug all equipment
• Attach garden hose to drain fitting
• Run hose to safe drain location (sanitary sewer or lawn — never storm drains)
• Open drain valve (20-30 min for 50 gallons)
• Spray interior with 10% bleach solution
• Let sit 10 minutes
• Scrub with microfiber cloth (never abrasive scrubbers)
• Rinse thoroughly
• Inspect bulkhead fittings, re-seal if needed
• Replace filter cartridge
• Close drain valve
• Fill with tap water (4" below rim)
• Run chiller and filter 1 hour to mix
• Test water chemistry
• Adjust pH to 7.2-7.8
• Add chlorine to 1-2 ppm
• Run ozone 30 min to sanitize fresh water

Winter preparation checklist

Before freezing weather:

• Insulate all exposed plumbing (foam pipe insulation)
• Verify filter pump runs continuously during freezing weather
• Place drip tray under chiller for condensation
• Have a drain plan for power outages (know where chiller drain plug is)
• Stock up on warm layers for post-plunge rewarming
• Reduce plunge duration by 30% for winter
• If leaving for 48+ hours during freezing weather: drain the entire system