709DCDA 709DCDA 2½ ”-10”2½ ”-10”

Modification OverviewModification Overview Production began in 1979 and is current.Production began in 1979 and is current.

Lead free (LF) version was introduced in 2010.Lead free (LF) version was introduced in 2010.

Bypass for the 709DCDA: Bypass for the 709DCDA: 1979-1991 (3/4” 709)1979-1991 (3/4” 709) 1991-1993 (3/4” 007M1)1991-1993 (3/4” 007M1) 1993-1998 (3/4” 007M3)1993-1998 (3/4” 007M3) 1998-Current (1/2” 007)1998-Current (1/2” 007)

Check Cover RemovalCheck Cover Removal Cover is o-ring sealed.Cover is o-ring sealed. Loosen bolts ½”. Loosen bolts ½”.

Spring load is now Spring load is now released from the released from the cover and retained by cover and retained by the check the check subassembly.subassembly.

Verify spring load Verify spring load before removing all before removing all the bolts.the bolts.

Check Valve RemovalCheck Valve Removal Center stem guided Center stem guided

check assembly.check assembly. Disc & spring Disc & spring

subassembly.subassembly. Slide subassembly Slide subassembly

straight out of seat straight out of seat and body. and body.

Check Seat RemovalCheck Seat Removal * 21/2-3” Seats removed * 21/2-3” Seats removed

by ¼ turn twist.by ¼ turn twist. 4”-10” Seats secured 4”-10” Seats secured

by two retaining wires. by two retaining wires. Each wire 10” long.Each wire 10” long.

Pull one wire Pull one wire clockwise / one wire clockwise / one wire counter clockwise.counter clockwise.

Seats are o-ring sealed Seats are o-ring sealed and pull straight out of and pull straight out of body.body.

Check Disc ReplacementCheck Disc Replacement Remove retaining nut Remove retaining nut

for sizes 21/2”-4”.for sizes 21/2”-4”. Remove allen head Remove allen head

screws in retainer screws in retainer plate for sizes 6”-10”.plate for sizes 6”-10”.