Maintenance Schedule
| Task | Frequency |
|---|---|
|
Replace sediment filter cartridge (Stage 1)
The Big Blue housing. Replace the SpiroPure SP-DD-6010-20BB dual-gradient cartridge. Removes sand, rust, silt, and particulates. Replace sooner if flow drops noticeably.
|
Every 1–2 Years |
|
Replace carbon block cartridge (Stage 2 & 3)
If you have a 3-stage housing, replace both carbon block cartridges. These remove chlorine, taste, and odor.
|
Every 6–12 Months |
|
Inspect housing O-rings & sump seals
Check for drips around the housing. Lubricate O-rings with food-grade silicone grease if needed.
|
Annually |
|
Flush housing after cartridge change
Run water for 2–3 minutes after installing new cartridges to flush out carbon fines.
|
Each Cartridge Change |
Filters & Supplies
SpiroPure SP-DD-6010-20BB — Big Blue Sediment Filter
Dual-gradient spun polypropylene · 20" × 4.5" Big Blue cartridge · 60–10 micron (nominal). Fits the Big Blue pre-filter housing on your system. Also replaces SDC-45-2010. Replace every 1–2 years or when flow drops.
Buy at AllFilters.com
SpiroPure SP-WH325 — 3-Stage Whole House Replacement Set
Complete annual replacement set for 3-stage Big Blue systems. Includes sediment, coconut shell carbon block, and dual-gradient sediment cartridges. 4.5" × 20" size. Replace every 12 months. ~$135 for the full set with free shipping.
Buy at AllFilters.com
Filter Wrench (Housing Tool)
Spanner wrench sized for Big Blue filter housings. Makes unscrewing the sump quick and easy without damaging the housing.
Buy at Walmart
How-To Videos
How to Change Pre-Filter Cartridges
Need a Hand?
Our team is available for service calls, tune-ups, and repairs throughout the Houston area.