F21-Series

Part No.

Type

Flow rate

Max. Backwash

F21-STC

Softener timer

≤51 GPM

25 GPM

F21-ITC

Iron Filter timer

≤22 GPM

49 GPM

F21-FTC

Filter timer

≤22 GPM（for sand filter）

49 GPM

≤35 GPM(for carbon filter)

F21-SMM

Softener meter immediate

≤51 GPM

25 GPM

F21-STM

softener meter delayed

≤51 GPM

25 GPM

Inlet/Outlet fittings

1-1/2" NPTF

regeneration

Max. AV

7 W

Supply frequency

Supply voltage

AC 230 V or 120 V or 24 V

Pressure

Temperature

34-110 F / 1-43 C

Peak flow rate @25 PSI drop

Distributor pilot

1.9"OD pipe

Height from top of tank

Mounting base

4"-8 UNEF

Brine line

Drain line

11/16-20 UN