iSpring WF150K review
iSpring WF150K Whole House Central Water Filtration System with Smart Valve
By Tom Calder
A self-cleaning central tank: a smart valve backwashes the media on a schedule, so it handles high flow (26 gpm peak) and lasts 5 to 10 years. It needs a drain and, iSpring says, ideally a licensed plumber. Its certification wording contradicts itself and we found no listing, so we rate it on what it is, not what it claims.
- Best for
- Large homes that want a self-flushing tank
- Skip it if
- You don't have a drain near the main line
as of Nov 14, 2026, 5:36 PM ET · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.We earn a commission if you buy through the retailer links on this page. It doesn't change our verdict. How we make money →
Researched, not used. We haven't used this product. This review is built from the maker's specifications, owner reports and our own sizing.
What we like
- Backwashes itself: no cartridges
- Up to 26 gpm peak
- 5 to 10 years of media
Worth knowing
- Needs a drain line and serious plumbing
- 130 lb tank, over 5 ft tall
- No certification listing found
ⓘ As an Amazon Associate, PreparedStates earns from qualifying purchases. We may earn a commission when you buy through our links. When two products are close, commission can decide which one we pick. A clearly better product always wins. Amazon prices come from Amazon's own product data and can change at any time.
Who shouldn't buy this
Don't buy it if you don't have a drain near the main line: a non-backwashing tank like the A. O. Smith needs none.
Key specs
| Type | Backwashing catalytic carbon tank |
| Certification (certifier's listing) | None found; maker page wording contradicts itself |
| Flow (maker) | Up to 26 gpm peak |
| Filter life (maker) | 10 years (2-3 bath), 5 years (4-5 bath) |
| Connection | 3/4 in or 1 in NPT (page inconsistent) |
This is a Researched review: we haven't used this product. We check every specification against at least two independent sources, re-check the US price on a schedule where we can track it automatically, and say plainly who it isn't for. Commissions never change a rating.
If this isn’t the one
Best for A 10-year carbon tank for city water
as of Nov 14, 2026, 5:36 PM ET · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.
Best for Bigger homes that want high flow and a UV stage
as of Nov 14, 2026, 5:36 PM ET · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.Best for Sized-to-the-house carbon tank, bought from the maker
See the comparison →