1 / 7iSpring WGB31B 3-Stage Whole House Water Filter
The iSpring WGB31B is a three-stage whole-house water filter with a sediment cartridge and two carbon block filters. Its listed 15 gpm flow rate and 1-inch NPT connections suit buyers seeking sediment, chlorine, taste, and odor reduction throughout the home. It does not reduce water hardness or total dissolved solids, so it is not a softener or a TDS-removal system.
At a glance
- Three-stage arrangement uses one sediment filter and two carbon block filters.
- Manufacturer claims reduction of up to 99% of chlorine, along with sediment, taste, and odor reduction.
- Listed capacity is up to 50000 gallons or 12 months, depending on water use and quality.
- Built-in pressure-release buttons are intended to make cartridge changes easier.
- Manufacturer states the system retains minerals and does not reduce TDS.
Often bought together
Pros and cons
Pros
- Three filtration stages include sediment and carbon block media for a broad set of stated taste, odor, chlorine, and particulate concerns.
- A listed maximum flow rate of 15 gpm and 1-inch female NPT connections provide useful installation and flow details for whole-house planning.
- Filter replacement is supported by built-in pressure-release buttons.
Cons
- This system does not reduce water hardness or total dissolved solids, so those needs require separate treatment.
Technical specifications
16 specifications| Brand | iSpring |
|---|---|
| Model | WGB31B |
| Stages | 3-Stage |
|---|---|
| Purification method | Carbon Block, Sedimentation |
| Maximum flow rate | 15 gpm |
| Capacity | 50000 gallons |
| Filter life cycle | 12 months |
| Inlet/outlet | 1 inch Female NPT |
|---|---|
| Installation type | Wall Mount |
| Minimum working pressure | 25 psi |
|---|---|
| Maximum working pressure | 80 psi |
| Operating temperature | 40-100 ºF |
| pH range | 6 - 9 |
| Dimensions listed | 24.5"L x 8"W x 18"H |
|---|---|
| Weight listed | 27.2 pounds |
| Material listed | Plastic, PP (Polypropylene), PE (Polyethylene), Steel |
|---|
What to know before buying
- The stated 50000-gallon capacity and 12-month filter life are conditional on water use and quality. The manufacturer advises indoor installation in a ventilated area away from direct sunlight and heat, with outdoor use requiring protection from weather and frost. Its listed pH, pressure, and temperature ranges should be checked against the installation site.
What’s in the box
Included- System
- Filters
- Wrench
- Manual
Who is it for?
A good fit for
- Homes, apartments, or vacation properties needing whole-house sediment and carbon filtration.
- Buyers whose priorities include chlorine, taste, or odor reduction and whose plumbing can accommodate 1-inch female NPT connections.
- Installations where the specified working pressure and water temperature fall within the listed ranges.
Less suited to
- People needing water softening or total dissolved solids removal from this unit alone.
- Buyers who need independently verified contaminant-reduction performance or a water-treatment certification, neither of which is supplied here.
Customer reviews on Amazon
- 5 stars
74% 74% - 4 stars
18% 18% - 3 stars
4% 4% - 2 stars
0% 0% - 1 star
4% 4%
Customer feedback reports improved perceived water quality, cleaner taste, reduced chemical smells, and better shower experiences. These reports align with the system’s stated sediment and carbon filtration aims, but they do not establish PFAS reduction for this model, which is not claimed in the supplied product specifications. Aggregate ratings are generally favorable but include a small share of low ratings, and do not explain individual experiences.
Positive themes
- Customer feedback describes improved water quality and taste.
- Feedback reports reduced chemical smells and better shower experiences.
Frequently asked questions
Does the WGB31B soften hard water?
No. The listing says this system does not reduce hardness. A separate water softener may be needed for hard water.
Does it remove total dissolved solids?
No. The manufacturer states that it retains minerals and does not reduce TDS.
How often do the filters need replacing?
The listing gives a filter life of 12 months or capacity of 50000 gallons, depending on water use and quality.
What are the connection and flow specifications?
The listing specifies 1 inch Female NPT inlet and outlet connections and a maximum flow rate of 15 gpm.
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