iSpring WSP-50SL Spin Down Sediment Filter
- Material Type: Brass
- Item Weight: 1 pound
- Number Of Items: 1
- Unit Count: 1
Last refreshed Sep 11, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A reasonable first-stage prefilter for protecting a softener or finer filter downstream, with the caveat that the Siliphos scale-inhibitor component is a wear item that needs periodic replacement.
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ASIN: B075ZDWVP9Model: WSP-50SLCategory: Water Softeners
Overview
The WSP-50SL is a 50-micron spin-down sediment prefilter meant to sit ahead of a finer whole-house water filter or softener, catching sediment, rust, sand, and dirt before they reach that downstream equipment.
It connects with 1 in MNPT and 3/4 in FNPT threads on both ends, so it fits into standard whole-house plumbing runs as a first stage, and a garden-hose barb on the flush valve makes it simple to rinse out. It also includes a Siliphos scale inhibitor cartridge, a separate function from the sediment screen that is meant to help reduce scale and corrosion in the plumbing downstream.
- 50-micron flushable spin-down sediment screen
- 1 in MNPT x 3/4 in FNPT double-threaded connections
- Built-in Siliphos scale and corrosion inhibitor
- Garden-hose barb flush valve for easy rinse-out
Who it's for
Homeowners installing or already running a whole-house filter or softener who want to protect that finer equipment from sediment, and reduce its workload, with a reusable first-stage filter ahead of it.
Pros and cons
- Flushable and reusable rather than a disposable cartridge
- Clear housing lets you see sediment buildup directly
- Extends the life of finer filters or a softener installed downstream
- Includes a Siliphos component to help limit scale and corrosion
- Rated for indoor use only, 40-100F and 20-100 psi
- Siliphos component needs replacing every 3-6 months
- Functions as a prefilter, not a standalone softener or full filtration system
Performance notes
The 50-micron screen catches sediment by spinning water through the housing, and it can be flushed clean via the garden-hose barb rather than replaced, which cuts the load on whatever finer filtration or softening sits behind it. The included Siliphos component is consumable, and iSpring recommends replacing it every 3 to 6 months to keep it effective against scale.
Specifications
| Brand | iSpring |
|---|---|
| Model | WSP-50SL |
| Dimensions & fit | |
| Item Weight | 1 pound |
| Item Dimensions D X W X H | 3.5 × 3.5 × 9 inches |
| Construction & materials | |
| Material Type | Brass |
| Included components | |
| Unit Count | 1 |
| Included Components | Water filtration system, filter cartridge, installation manual, parts |
| Warranty & support | |
| Manufacturer Warranty Description | 1 year manufacturer |
| Other details | |
| Number Of Items | 1 |
| Item Type Name | ISpring WSP-50SL Reusable Whole House Spin Down Sediment Water Filter Softener With Siliphos Helps Prevent Scale And Corrosion, 1" MNPT + 3/4" FNPT, 50 Micron |
| Product Benefits | Prolongs service life of appliances, easy installation and maintenance, removes large sediment particles, prevents scale corrosion with Siliphos |
| External Testing Certification | REACH |
| Manufacture Year | 2023 |
| Set Name | WSP-50SL 50 Micron |
Frequently asked questions
What does the iSpring WSP-50SL connect to?
It threads into standard whole-house plumbing with 1 in MNPT and 3/4 in FNPT connections on either end, typically installed as the first stage ahead of a finer filter or softener.
Do I need to replace the WSP-50SL filter screen?
The sediment screen itself is flushable and reusable, but the included Siliphos scale-inhibitor component should be replaced roughly every 3 to 6 months.
Can the WSP-50SL be installed outdoors?
iSpring rates it for indoor use only, within a 40 to 100F and 20 to 100 psi range.