4000CIV 21/2”-10”.

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Presentation transcript:

4000CIV 21/2”-10”

Modification Overview Production of the 4000CIV (Watts 909) began in 1998 and is current.

Check Cover Removal Cover is o-ring sealed. Loosen bolts ½”. Spring load is now released from the cover and retained by the check subassembly. Verify spring load before removing all the bolts.

Check Valve Removal Center stem guided check assembly. Disc & spring subassembly. Slide subassembly straight out of seat and body.

Check Seat Removal * 21/2-3” Seats removed by ¼ turn twist. 4”-10” Seats secured by two retaining wires. Each wire 10” long. Pull one wire clockwise / one wire counter clockwise. Seats are o-ring sealed and pull straight out of body.

Check Disc Replacement Remove retaining nut for sizes 21/2”-4”. Remove allen head screws in retainer plate for sizes 6”-10”.

RV Cover Removal RV Cover is sealed by the diaphragm. Loosen cover bolts ½”. Spring load is now released from the cover and retained by the bottom plug assembly. Verify spring load before removing all the bolts.

RV Stem Removal The piston subassembly can be lifted straight up and out of the body. The bottom plug subassembly (4”-10”) contains the spring and does not need to be removed for normal service. * For removal: simply unscrew from outside the RV body.

RV Seat Removal Unless damaged, there is no need to remove the RV seat. RV seat is threaded and o-ring sealed.

RV Rubber Replacement Replace diaphragm. Replace wiper seal and piston o-ring. Apply lubricant to the o-ring. Replace RV disc. * Hold upper guide fin and unscrew pressure plate. Replace disc assembly and stem o-ring.