Backwashing filter valve · Fleck

Fleck OEM 5600 5600 Backwash Filter Valve

Backwashing filter valve

Updated October 2026

Quick verdict

A sound backwashing filter valve for replacing a failed head on a sound tank.

Strength
Backwashing filter valve.
Trade-off
Programming and injector must match your tank.
Right buyer
Replacing a failed head on a sound tank.
Service flow (maker)
20 GPM
Pipe connection
1 in
Voltage
120v
Material
Glass-reinforced Noryl
Dimensions (seller)
9 x 7.5 x 5 inches
Product weight
3.4 lb
Prices change often; the button shows today's price.

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What it does for your water

The Fleck OEM 5600 5600 Backwash Filter Valve is a backwashing filter valve (Fleck 5600). Its listing gives a service flow of 20 GPM. Connections: 1 in.

A filter head backwashes on a timer and uses no brine; it is used on iron, carbon and sediment tanks.

Program the regeneration time for overnight, when no one is drawing water.

A replacement head must match the tank's thread (most residential tanks use 2.5-inch 8-thread), the distributor tube diameter and the injector size for the tank diameter. Parts that name it are in the valve parts lookup.

From the listing: connections 1 in; model OEM 5600; material Glass-reinforced Noryl; flow 20 GPM.

The listing gives dimensions of 9 x 7.5 x 5 inches and a shipping weight of 3.4 lb.

Is it the right unit for your house?

Choose it when

  • Replacing a failed head on a sound tank
  • Re-heading a softener or filter

Pass on it when

  • Tanks with a different thread or riser size

Where it wins and where it loses

Wins

  • Backwashing filter valve
  • 20 GPM flow
  • Wide parts supply

Loses

  • Programming and injector must match your tank
  • Drain and plumbing work needed

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 numberOEM 5600Retailer
MaterialGlass-reinforced NorylRetailer
Dimensions (seller)9 x 7.5 x 5 inchesRetailer
Pipe connection1 inRetailer
Product weight3.4 lbRetailer
Service flow (maker)20 GPMRetailer
Voltage120vRetailer

Units to weigh against it

Other control valves in the catalog

Every control valves on one grid · All Fleck units we cover

Final verdict

A sound backwashing filter valve for replacing a failed head on a sound tank.

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 Fleck OEM 5600 5600 Backwash Filter Valve for?
The Fleck OEM 5600 5600 Backwash Filter Valve is a backwashing filter valve (Fleck 5600). Its listing gives a service flow of 20 GPM. Connections: 1 in.