3
1st Check
Ordering Code
Kit No.
Size
in.
mm
7016330
ARK 2000B CK4
1
⁄
2
15
7016331
ARK 2000B CK1
3
⁄
4
20
7016332
ARK 2000B M3 CK1
3
⁄
4
20
7016333
ARK 2000B CK4
1
25
7016334
ARK 2000B CK1
1
1
⁄
4
– 1
1
⁄
2
32-40
7016335
ARK 2000B CK1
2
50
2nd Check
Ordering Code
Kit No.
Size
in.
mm
7016330
ARK 2000B CK4
1
⁄
2
15
7016337
ARK 2000B CK2
3
⁄
4
20
7016338
ARK 2000B M3 CK2
3
⁄
4
20
7016333
ARK 2000B CK4
1
25
7016340
ARK 2000B CK2
1
1
⁄
4
– 1
1
⁄
2
32-40
7016341
ARK 2000B CK2
2
50
Kit includes:
Seat, Seat O-ring, Disc assembly, Spring, Check cage and Cover
O-ring.
Cover Kit
Ordering Code
Kit No.
Size
in.
mm
7016342
ARK 2000B C
1
⁄
2
15
7016343
ARK 2000B C
3
⁄
4
20
7016344
ARK 2000B M3 C
3
⁄
4
20
7016345
ARK 2000B C
1
25
7016346
ARK 2000B C
1
1
⁄
4
– 1
1
⁄
2
32-40
7016347
ARK 2000B C
2
50
Kit includes:
Cover and Cover O-ring.
Complete Rubber Parts
Ordering Code
Kit No.
Size
in.
mm
7016348
ARK 2000B RT
1
⁄
2
15
7016349
ARK 2000B RT
3
⁄
4
20
7016350
ARK 2000B M3 RT
3
⁄
4
20
7016351
ARK 2000B RT
1
25
7016352
ARK 2000B RT
1
1
⁄
4
– 1
1
⁄
2
32-40
7016353
ARK 2000B RT
2
50
Kit includes:
Cover O-ring, Two seat discs and Two seat O-rings.
Servicing the First and Second Check Valves
NOTE: Before servicing be certain water is turned off or shutoff valves are closed
1. After removing the cover, remove the retainer for the body bore. The check valve
modules can now be removed from the valve by hand or with a screwdriver.
Note: For Series 2000B sizes
1
⁄
2
" – 2", the seats and springs of the first and second
check modules are not interchangeable. The heavier spring and smaller diameter seat
belong with the first check module.
2. The check seats are attached to the cage with a bayonet type locking
arrangement. Holding the cage in one hand, push the seat inward and rotate
clockwise against the cage. The seat, cage, spring and disc assembly are now
individual components.
3. The disc assembly may now be cleaned and reassembled or, depending on its
condition, it may be discarded and replaced with a new assembly from the repair
kit. O-rings should be cleaned or replaced as necessary.
4. Reassemble the check valve module in the reverse order. Check modules are
installed in the valve body with the seats facing the valve inlet. The modules must
be securely in place before the retainer can be replaced. On the
3
⁄
4
" – 1" size, this
retainer may have to be tilted slightly into place. Replace cover.
Maintenance Instructions
Replacement Parts
Check Assembly
3
/
4
" (20mm) M3
O-rings
Check Cage
Spring
Disc
Seat
Seat
Cover
Cover
O-ring
Retainer
Body
First Check
Second Check
Seat
O-ring
Disc
Assembly
Spring
Check
Cage
Cover
Cover
O-ring
Retainer
Body
First Check
Second Check
1" 2000B (25mm)
When ordering, specify Ordering Code Number, Kit Number and Valve Size.
Series 2000B Sizes
1
⁄
2
" – 1" (15-25mm)
RPISA2000B.qxd 1/12/09 11:29 AM Page 3
