Yes and no. There are 2 versions of this product on Amazon. One includes Siliphos granules. Siliphos is a descaling agent.

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iSpring WSP-50SL Reusable Whole House Spin Down Sediment Water Filter Softener, Includes Siliphos Helps Prevent Scale and Corrosion, 1" MNPT + 3/4" FNPT, 50 Micron

iSpring WSP-50SL Reusable Whole House Spin Down Sediment Water Filter Softener, Includes Siliphos Helps Prevent Scale and Corrosion, 1" MNPT + 3/4" FNPT, 50 Micron

Q: Where can I buy the replacement siliphos for this filter system?

I don't see any replacement filters for this item. How can I purchase one?

Q: Can this be used as a post filter for an inline water heater?

Hi, Yes you can use the spin down filter as a post filter after an inline water heater but the spin down filter may be best used before the water heater to protect the water heater from sediment buildup. Thank you, iSpring Water Systems LLC

Q: Does it matter what direction this is hooked up?

Yes! If you look on the side of the filter housing at the top you will see an arrow pointing the direction of flow.

Product ID: 48450221

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Details

Material
Brass
Product Dimensions
2"D x 3.5"W x
Item Weight
453 Grams
External Testing Certification
REACH
Product Benefits
Prolongs life

🔄Flushable & reusable design

⚙️50 Micron precision filtration

🛠️Dual-thread easy installation

Frequently Bought Together

iSpring WSP-50SL Reusable Whole House Spin Down Sediment Water Filter Softener, Includes Siliphos Helps Prevent Scale and Corrosion, 1" MNPT + 3/4" FNPT, 50 Micron

iSpring WGB21B 2-Stage Whole House Water Filtration System, with 10" x 4.5" Sediment CTO(Chlorine, Taste, and Odor) Filter, 1" Inlet/Outlet

Description

💧 Elevate your home’s water game with smart sediment defense!

VERSATILE INDOOR READY - Fits standard 1" MNPT + 3/4" FNPT connections, designed for indoor use with reliable pressure tolerance.
FLUSHABLE REUSABLE CARTRIDGE - Reduce maintenance costs and extend the life of downstream filters with effortless cleaning.
PRECISION 50 MICRON FILTRATION - Captures sediment, rust, and sand before finer filters, protecting your whole house system.
SILIPHOS SCALE CORROSION DEFENSE - Innovative Siliphos formula softens water and prevents damaging scale buildup on your plumbing.
TRANSPARENT HOUSING FOR INSTANT MONITORING - See sediment levels at a glance and know exactly when it’s time to flush.

The iSpring WSP-50SL is a durable, brass whole house spin down sediment filter rated at 50 microns, designed to trap large particles like rust and sand before water reaches finer filtration stages. Featuring a flushable and reusable cartridge, it reduces maintenance and prolongs filter life. Integrated Siliphos technology helps prevent scale and corrosion, protecting plumbing fixtures. Easy to install with dual-thread fittings and a clear housing for visual sediment monitoring, it’s optimized for indoor use within 20-100 psi and 40-100°F.

Specifications

Material	Brass
Product Dimensions	2"D x 3.5"W x 9"H
Item Weight	453 Grams
External Testing Certification	REACH
Product Benefits	Prolongs service life of appliances, easy installation and maintenance, removes large sediment particles, prevents scale corrosion with Siliphos
Brand	iSpring
Manufacture Year	2023
Set Name	WSP-50SL 50 Micron
UPC	662425088348
Global Trade Identification Number	00662425088348
Unit Count	1.0 Count
Number of Items	1
Manufacturer	ispring water systems
Part Number	WSP-50SL
Item Weight	16 ounces
Item model number	WSP-SL
Is Discontinued By Manufacturer	No
Size	50 Micron
Color	Brass
Style	Basic
Finish	Brass
Item Package Quantity	1
Number Of Pieces	1
Number of Handles	1
Included Components	Water filtration system, filter cartridge, installation manual, parts
Batteries Included?	No
Batteries Required?	No
Warranty Description	1 year manufacturer

Have a Question? See What Others Asked

Where can I buy the replacement siliphos for this filter system?

does it descale

Can this be used as a post filter for an inline water heater?

Does it matter what direction this is hooked up?

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