Whole-house softener · AFWFilters

AFWFilters Fleck 5600SXT 1.5 cu ft Water Softener

softener for up to 4 people at 15 gpg

Updated October 2026

Quick verdict

A sensible whole-house softener for up to 4 people on 15 gpg water.

Strength
14 GPM service flow.
Trade-off
Requires a drain line and power.
Right buyer
Up to 4 people on 15 gpg water.
Resin volume
1.5 cu ft
Service flow (maker)
14 GPM
Control valve
Fleck 5600SXT
Crosslink
10
Pipe connection
1" npt
Material
Polyethylene
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What it does for your water

The AFWFilters Fleck 5600SXT 1.5 cu ft Water Softener is a whole-house softener on a Fleck 5600SXT control valve. Its listing gives a service flow of 14 GPM.

Run at an efficient salt setting, its 1.5 cu ft of resin gives about 36,000 grains per regeneration rather than the full rating: enough for up to 4 people on 15 grains-per-gallon water regenerating weekly, or 2 on 25 grains per gallon. Size it to your own water.

The Fleck 5600SXT head is one of the most widely serviced valves; seal kits, pistons, boards and meters that name it are in the valve parts lookup.

The listing also gives features listed AFWFilters Premium Softener; mounting Freestanding; connections 1" npt; power AC; capacity stated as 1.5 cu ft; model 5600 SXT.

The listing gives dimensions of 10 in (L) x 10 in (W) x 62 in (H), a shipping weight of 130 lb and complete system in the box.

Warranty, per the listing: 5 year.

Is it the right unit for your house?

Choose it when

  • Up to 4 people on 15 gpg water
  • Replacing an older softener

Pass on it when

  • More than 2 people on 25 gpg water
  • Iron above about 5 ppm without an iron filter

Where it wins and where it loses

Wins

  • 14 GPM service flow
  • Fleck 5600SXT valve
  • 1.5 cu ft of resin

Loses

  • Requires a drain line and power
  • Softened water carries added sodium unless you use potassium chloride

Limits to know about

  • Figures are the maker's or seller's own; check fit and capacity against your water test and your equipment's manual.

Maker's figures

Every figure below comes from the source shown in brackets. Where the maker doesn't state something, we say so instead of estimating.

Model number5600 SXTRetailer
Features (seller)AFWFilters Premium SoftenerRetailer
Dimensions (seller)10"L x 10"W x 62"HRetailer
MaterialPolyethyleneRetailer
Mounting / installationFreestandingRetailer
MethodIon ExchangeRetailer
Service flow (maker)14 GPMRetailer
Product weight130 lbRetailer
Model namePentair WS48-56sxt10 Fleck water softenerRetailer
Warranty5 yearRetailer
Resin volume1.5 cu ftRetailer
Pipe connection1" nptRetailer
Control valveFleck 5600SXTRetailer
Crosslink10Retailer

Units to weigh against it

Other water softeners in the catalog

Every water softeners on one grid · All AFWFilters units we cover

Final verdict

A sensible whole-house softener for up to 4 people on 15 gpg water.

Where to buy

Our links open this exact model's product page. Prices and stock change; check what's included before you order.

Prices change often; the button shows today's price.

Each button opens this exact model. We may earn a commission on tracked links; it never changes what we publish. Disclosure

Questions buyers ask

What is the AFWFilters Fleck 5600SXT 1.5 cu ft Water Softener for?
The AFWFilters Fleck 5600SXT 1.5 cu ft Water Softener is a whole-house softener on a Fleck 5600SXT control valve. Its listing gives a service flow of 14 GPM.