FreshWater Clean Screen Pre-Filter

• 1 × FreshWater Clean Screen Pre-Filter — hose-end filter with standard garden hose threading on both ends
• Use instructions — printed on the packaging or filter housing

You'll need a standard garden hose to attach the pre-filter during fill operations. Many owners keep a dedicated hose for spa fills so the filter stays attached between uses, ready for the next fresh fill.

• Filters metals before they reach the spa — iron, copper, manganese, and other trace metals that cause staining and water discoloration
• Removes organic contaminants and tannins — decayed plant matter, dissolved organics from groundwater
• Catches sediment and sand — physical particles that would otherwise enter the spa and clog the spa's main filter
• 5,000 gallon capacity — approximately 10 complete fills for a 500-gallon spa, or 5–6 fills for a 1,000-gallon swim spa
• Standard garden hose connection — attaches to any standard 3/4" hose threading
• No silver ions — universally compatible with chlorine, bromine, biguanide, salt, ozone, and mineral sanitizer programs
• Reduces sanitizer chemistry burden — less contamination in means less chemistry needed to fix it
• May extend water life — cleaner fill water means lower Total Dissolved Solids (TDS) accumulation, which can stretch the time between drain-and-refill cycles
• Genuine Watkins Wellness — designed for the same spas Hot Spring and Caldera build

The Clean Screen Pre-Filter is a two-stage filtration cartridge housed in a sealed cylindrical body that screws inline with a garden hose. As water flows from your hose through the filter and into the spa, it passes through filtration media that captures contaminants by both physical and chemical mechanisms:

• Physical filtration — captures particulates, sand, sediment, and large organic debris that simply can't pass through the filter media
• Chemical reduction — proprietary media binds dissolved metals (iron, copper, manganese) and certain organic compounds, removing them from the water as it flows through

The capacity rating — 5,000 gallons — reflects the filter media's binding capacity. Once those binding sites are saturated with captured contaminants, the filter begins to lose effectiveness. At that point, replace it with a new unit.

Why this matters more than most owners realize: every contaminant that enters your spa during fill becomes part of your water chemistry. Trace iron will oxidize when chlorine is added, producing brown staining on the spa shell. Trace copper will produce blue-green tints. Sediment will clog your spa's main filter and force more frequent cleanings. Tannins will discolor water and consume sanitizer. By filtering at the source, you eliminate these problems before they ever start — which translates to less chemistry, fewer adjustments, and a spa that runs cleaner with less effort.

Pro Tip: The Clean Screen is most valuable on salt-system spas because the year-long fill cycle gives any introduced contamination a full year to cause problems. Chlorine-program spas typically refill every 3-4 months, so contamination has less time to accumulate damage. Salt owners filling without a Clean Screen are essentially committing to whatever's in their tap water for a year.

When to Use the Clean Screen

• Every fresh fill — the primary use case
• Every top-off operation when adding more than a few gallons to compensate for evaporation
• Especially every fill on well water — non-negotiable for well-water spas
• Especially every fill on a salt-system spa — year-long fill cycles benefit most from clean starting water

Installation and Use

1. Connect the Clean Screen to your garden hose using the standard 3/4" threaded fittings. Either end of the pre-filter can connect to the hose, but verify the arrow direction printed on the housing matches your water flow direction.
2. Connect the outlet end to a second hose section or directly to the spa fill location. Many owners run the filter at the hose-end so it's positioned right where the water exits into the spa.
3. Turn on the water gradually — full pressure on a new filter can push fines through; gradual ramp-up gives the filter media time to settle.
4. Fill the spa as normal. The pre-filter is doing its job invisibly during the fill.
5. Turn off the water when the spa is full.
6. Disconnect if you're storing the filter between fills, or leave attached to a dedicated spa hose for next time.
7. Track gallons filtered — keep a mental count (or write it on the filter with a marker) so you know when to replace.

Tracking Filter Life

• 5,000 gallon total capacity across the filter's lifespan
• One 500-gallon spa fill ≈ 500 gallons — gives you ~10 fills per filter
• One 1,000-gallon swim spa fill ≈ 1,000 gallons — gives you ~5 fills per filter
• Top-off operations add up — a typical hot tub uses 10-50 gallons per top-off, so factor those in

Signs the Filter Needs Replacement

• You've hit the 5,000-gallon mark in tracked use
• Flow rate drops noticeably when filling — clogged media restricts water flow
• Water exiting the filter looks off-color or has visible particulates
• Two or more years have passed since the filter was first opened, even if not heavily used — over time, media can lose effectiveness

Storage Between Fills

• Drain the filter after each use by holding it vertically and letting residual water drain out both ends
• Store in a cool, dry location away from direct sunlight
• Protect from freezing — water trapped inside the filter can damage the media and housing if it freezes and expands
• Keep both end caps clean — debris on hose threads can cross-contaminate the filter inlet

Pro Tip: Filling a hot tub takes longer with a pre-filter — water flow is restricted as it passes through the filtration media. Plan for an extra hour or two for a full spa fill versus filling without a pre-filter. The added time is the cost of dramatically cleaner starting water — and it's the easiest investment you'll ever make in water quality.

• Brand: FreshWater® (Watkins Wellness)
• Manufacturer Part Number / SKU: 80102 (current) / 76028 (legacy packaging)
• Form: Inline hose-end cartridge filter
• Connection: Standard 3/4" garden hose threading on both ends
• Capacity: 5,000 gallons total
• Approximate Uses: ~10 fills for a 500-gallon spa; ~5 fills for a 1,000-gallon swim spa
• Filters Out: Organic contaminants, tannins, metals (iron, copper, manganese), sand, sediment, and other particulates
• Does NOT Filter: Phosphates, calcium hardness, dissolved salt, ammonia
• Silver Ions: Not present — fully compatible with biguanide and all other sanitizer programs
• Sanitizer Compatibility: Universal — chlorine, bromine, biguanide, ozone, FreshWater Salt, ACE, Ag+, MPS programs
• Spa Compatibility: All residential hot tubs, spas, swim spas, and cold plunge tubs regardless of brand
• Storage: Cool, dry location; drain after use; protect from freezing
• Discount Eligibility: MAP-protected — not eligible for general discount codes (sold at manufacturer-set pricing)
• Hazmat Classification: Non-hazmat — eligible for mail return per standard policy
• Country of Origin: Manufactured for Watkins Wellness, USA

The Clean Screen Pre-Filter is universally compatible — it works with any garden hose and any residential hot tub or spa, regardless of brand or sanitizer system.

Water Sources

• Municipal water — removes residual chlorine, occasional iron/copper from aging plumbing, and chemical taste
• Well water — most valuable application; well water contamination varies enormously and is the most common cause of brown-stained spa shells
• Treated water from softeners — supplemental filtration for households on water softeners
• Any standard 3/4" garden hose threading

Spa Types

• All residential hot tubs and spas — Hot Spring, Caldera, Freeflow, Sundance, Bullfrog, Jacuzzi, Marquis, Master Spas, Cal Spas, and every other major brand
• Swim spas — larger volumes consume the filter capacity faster (5–6 fills vs. 10)
• Inflatable and portable spas — even more important here, since portable spas have less margin for contaminated water
• Cold plunge tubs

Sanitizer Systems

The Clean Screen does NOT contain silver ions or any sanitizer chemistry, which makes it compatible with every water care program:

• Chlorine — all forms
• Bromine — all forms
• Biguanide (Soft Soak / Baqua Spa) — silver-ion pre-filters would interfere with biguanide; this one won't
• Ozone systems
• FreshWater® Salt System and Hot Spring® ACE® systems
• FreshWater® Ag+ Silver Ion programs
• MPS-based programs

What It Doesn't Filter

• Phosphates — test with FreshWater Phosphate Test Strips and use a phosphate remover product separately
• Hardness (calcium) — use FreshWater Vanishing Act Calcium Remover to lower calcium hardness after fill
• Salt or salinity — naturally salty fill water would still need to be addressed with appropriate dilution
• Already-contaminated spa water — this is a pre-filter for fill operations only, not an inline filter for the running spa

Works Alongside

• FreshWater Vanishing Act Calcium Remover — addresses calcium hardness after fill (the Clean Screen handles metals; Vanishing Act handles calcium)
• FreshWater 5-Way Test Strips — test fill water quality and confirm the pre-filter is doing its job
• FreshWater Phosphate Test Strips — for the contamination Clean Screen doesn't filter
• FreshWater Stain & Scale Defense — second line of defense; sequesters anything that gets past the pre-filter
• FreshWater Concentrated Chlorinating Granules — start-up chlorination after a clean fill