SDC-25-4025 Hydronix Comparable Tier1 Replacement Whole House Water Filter

Price $16.99
Availability: In stock
Fits 40 x 2.5 inch housings
  • Ideal for commercial applications
  • Replace O-ring when replacing the filter every 6 months to help prevent leaking and optimize performance
  • Provides greater dirt holding capabilities, versus string wound filters
  • Polypropylene media Impedes bacteria growth
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The SDC-25-4025 Hydronix Comparable Tier1 Whole House Sediment Water Filter is a replacement whole house sediment cartridge designed to reduce sediment and dirt. Capable of retaining more dirt and contaminants than string wound filters, this spun wound media is also helpful due to its property of being resistant to bacterial growth. With an actual size at 40 x 2.5 inches and its high dirt holding capacity this filter is ideal for commercial applications. The filter should be exchanged every 6 months to maintain optimal performance or sooner if you notice slower flow rates due to the filter being clogged up with contaminants. We recommend replacing the O-ring with the filter as it will help create a new tight seal and prevent leaking. Trust the experts at Tier1 to meet your water filtration needs. Tier1 is ready to protect every drop.

Experience the Tier1 Difference

Tier1 manufactures high-quality filtration and household products. We take creating and maintaining a healthy home seriously. Products must undergo rigorous testing and meet demanding quality expectations in order to earn the Tier1 badge. Every purchase is backed by the Tier1® Guarantee:

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Package Qty 1
Used In Brands Hydronix, Tier1
Manufacturer's Id P25-40
UPC 799932619878
Advertised Size (in) 40 x 2-1/2
Actual Size (in) 40 inches (length) x 2-1/2 inches (outside diameter)
Actual Size (cm) 101.6 x 6.35
Media Spun Wound Polypropylene
Primary Filter Media Polypropylene
Filter Life (months) 6 months
Micron Rating (Nominal) 25
Operating Temperature (°F) 40 - 145
Operating Temperature (°C) 4.4 - 62.8
Flow Rate (gpm) 20
Flow Rate (lpm) 75.7082
Warranty Guarantee Unconditional Product Guarantee for Life of the Product
Primary Filter Media Polypropylene

Reduced Contaminants

The TIER1-P25-40 reduces the following contaminants:

  • Dirt
  • Particles
  • Sediment

The TIER1-P25-40 is comparable with the following part numbers



  1. Turn off water supply. Press red pressure-relief button (if present)
  2. Unscrew housing. Remove large o-ring, wipe clean and set aside
  3. Discard used filter cartridge
  4. Wash housing with dish soap and warm water using a nonabrasive sponge or cloth. Rinse thoroughly
  5. Fill 1/3 with water. Add about 1 tablespoon of bleach and scrub to disinfect. Rinse thoroughly
  6. Lubricate o-ring with clean silicone grease. Change o-ring if any damage cuts or degradation are present. Insert o-ring in groove
  7. NOTE: This step is important to ensure a proper housing seal. Make certain the o-ring is seated level in the groove
  8. Insert new filter cartridge
  9. Screw housing onto the cap and hand-tighten. Do not over tighten. Make sure cap standpipe slips into cartridge
  10. Turn on water supply. Press pressure-relief button (if present). Check for leaks before leaving installation

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