Instructions / Assembly
2
or
3
4
4a
5
6
7
7
8
9
10
11
21
12
13
14
15
15
18
1. AS or AS-T Air Separator
2. 9D Backflow Preventer
3. BD,SW,SS Boiler Drain Valves
4. 1156F-A or 1156F, B1156F,
N256, 1450F, T145B Boiler
Fill Valves 4a 911S Combination
S1156F Fill Valve and
9D Backflow Preventer
5. CV/CVY Bronze Check Valve
6. ET/ETX Expansion Tank
7. 2000, 2000S Flow Checks
8. P3 Flow Control Valve
9. GVS/GV Gate or GLV Globe Valves
10. 1170, 70A, N170-M2 Mixing Valves
11. RPV or PB56 Purge Valves
12. 3L, 53L Pressure Relief Valves
13. 374A, 174A, 740 Hot Water Boiler
Safety Relief Valves
14. T&P Test Plug
15. B-6000 Ball Valve
16. FV-4M1 Float Vent Valve
17. DuoVent Automatic Float Vent Valve
18. U5B, 25AUB Water Pressure
Reducing Valves
19. SCV
1
⁄8” or
1
⁄4” Service Check Valves
20. SCV
1
⁄2” Service Check Valve
21. DPTG Temperature/Pressure Gauge
Watts Specialty Items for Hydronic Heating Systems
4
2
6
6
16
17
19
20
1
1 AS-T
Alternate Fill Valve Piping
A
AS
C
B
D
D1
E
AS-T
B
E
C
A
MODEL SIZE DIMENSIONS WEIGHTS
A B C D D1 E
in. in. mm in. mm in. mm in. mm in. mm in. mm lbs. kg
AS-M1 1 6
1
⁄4 159 4 102 2
3
⁄4 70
1
⁄8 3 – –
1
⁄2 13 4.5 2.0
AS-T-M1 1 6
1
⁄4 159 4 102 2
3
⁄4 70
1
⁄8 3
1
⁄2 13
1
⁄2 13 4.5 2.0
AS-M1 1
1
⁄4 6
1
⁄4 159 4 102 2
3
⁄4 70
1
⁄8 3 – –
1
⁄2 13 4.5 2.0
AS-T-M1 1
1
⁄4 6
1
⁄4 159 4 102 2
3
⁄4 70
1
⁄8 3
1
⁄2 13
1
⁄2 13 4.5 2.0
AS-M1 1
1
⁄2 8 203 5
5
⁄16 135 3
5
⁄8 92
1
⁄8 3 1 25
1
⁄2 13 7.4 3.4
AS-M1 2 8 203 5
5
⁄16 135 3
5
⁄8 92
1
⁄8 3 1 25
1
⁄2 13 7.4 3.4
AS-M1 2
1
⁄2 10
5
⁄16 262 7
1
⁄4 184 5 127
1
⁄8 3 1 25
1
⁄2 13 15.0 6.8
AS-M1 3 10
5
⁄16 262 7
1
⁄4 184 5 127
1
⁄8 3 1 25
1
⁄2 13 15.0 6.8
Dimensions
ES-AS/AST 0714 © 2019 Watts
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