Watts RWT-CS Above Ground Corrugated Steel Tanks Specification
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ES-RWT-CS
Rainwater Harvesting - Storage Tank
Engineer ––––––––––––––––––––––––––––––––––––––––––––– Contractor’s P.O. No. –––––––––––––––––––––––––––––––––––
RWT-CS
Above Ground Corrugated
Steel Tanks
Sizes up to 200,000 Gallon Capacity
Above ground corrugated steel tanks for rainwater harvesting are engineered to meet or exceed all NFPA 22 Fire Protection
Codes and AWWA-D103-09 Standards using ASCE7-10, IBC, and NBC building codes. Tanks are manufactured from durable
G195 galvanized steel and a 40 mil reinforced NSF-61 grade PVC containment liner for long service life. Tanks and accessories are accepted for wet stamp and seal certificates throughout the
United States and Canada. Tanks are shipped disassembled for onsite assembly and installation.
Advantages:
• Engineered for up to 185 MPH wind speeds, durable snow loads, and seismic forces at project specific locations.
• NFPA 22 rated for dual purpose water storage applications where permitted by local code
• 20 year manufacturer’s product warranty
• Onsite tank assembly services available
Features
• Heavy-duty 40 mil PVC liner
• Corrosion resistant G195 galvanized coating for all steel panels
• 30° flat seam roof panels on 6 FT, 8 FT, and
9 FT diameter tanks
• 30° high-rib roof panels on 12 FT to 33 FT diameter tanks
• Side roof inspection hatch
• Configurable inlet, outlet, and discharge plumbing connections for installation to tank sidewall or floor.
• Junction boxes for electrical service available
• Exterior ladder and OSHA approved cages available
• Additional sizes and accessories available, please contact
Watts for more information.
NOTICE
The information contained herein is not intended to replace the full product installation and safety information available or the experience of a trained product installer. You are required to thoroughly read all installation instructions and product safety information before beginning the installation of this product.
RWT-CS
WARNING
Rainwater supplied by Watts rainwater harvesting systems is not potable water and is not intended for potable water applications.
Do Not Drink Water supplied from Watts rainwater systems and related equipment. Users shall determine the suitability of the product for the intended application before using.
Watts product specifications in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements, please contact Watts Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials without prior notice and without incurring any obligation to make such changes and modifications on
Watts products previously or subsequently sold.
Available Models
Diameter Model
RWT-CS1202
RWT-CS1203
RWT-CS1204
RWT-CS1205
RWT-CS1206
RWT-CS1501
RWT-CS1502
RWT-CS1503
RWT-CS1504
RWT-CS1505
RWT-CS1506
RWT-CS1507
RWT-CS1801
RWT-CS1802
RWT-CS601
RWT-CS602
RWT-CS603
RWT-CS604
RWT-CS605
RWT-CS606
RWT-CS901
RWT-CS902
RWT-CS903
RWT-CS904
RWT-CS905
RWT-CS906
RWT-CS1201
RWT-CS1803
RWT-CS1804
RWT-CS1805
RWT-CS1806
RWT-CS1807
RWT-CS2101
RWT-CS2102
RWT-CS2103
RWT-CS2104
RWT-CS2105
RWT-CS2106
RWT-CS2107
RWT-CS2108
71 IN
(5'-11")
107 IN
(8'-11")
143 IN
(11'-11")
179 IN
(14'-11")
215 in
(17'-11")
251 IN
(20'-11")
To Eaves (IN)
132
176
220
264
308
44
88
88
132
176
220
264
44
88
44
88
132
176
220
264
44
44
88
132
176
220
264
44
88
132
176
132
176
220
264
308
220
264
308
352
Roof Only
(IN)
47.3
47.3
47.3
47.3
47.3
57.7
57.7
42.5
42.5
42.5
42.5
42.5
47.3
47.3
31.7
31.7
31.7
31.7
31.7
31.7
42.5
21
21
21
21
21
21
68
68
68
68
57.7
57.7
57.7
57.7
57.7
68
68
68
68
Empty Weight
(LBS)
1,516
1,954
2,369
2,876
3,460
998
1,365
769
1,003
1,318
1,667
2,005
820
1,128
345
520
712
887
1,088
1,306
519
225
341
458
591
708
825
1,818
2,346
2,951
3,647
4,511
1,384
1,815
2,437
3,139
3,947
4,952
5,963
7,181
Overall w/Roof
(IN)
179
223
267
311
355
102
146
131
175
219
263
307
91
135
76
120
164
208
252
296
87
65
109
153
197
241
285
102
156
200
244
190
234
278
322
366
288
332
376
420
14,388
19,184
23,980
28,776
33,572
6,906
13,812
6,139
9,208
12,278
15,347
18,416
4,796
9,592
Theoretical
Volume
(US Gallons)
767
1,535
2,302
3,069
3,837
4,604
1,727
3,453
5,180
6,906
8,633
10,359
3,069
20,719
27,625
34,531
41,437
48,343
9,400
18,800
28,200
37,600
47,000
56,401
65,801
75,201
13,080
17,876
22,672
27,468
32,264
5,023
11,929
5,302
8,371
11,441
14,510
17,579
3,488
8,284
Useable
Volume
(US Gallons)
558
1,325
2,093
2,860
3,627
4,395
1,256
2,982
4,709
6,435
8,162
9,888
2,232
18,835
25,741
32,647
39,554
46,460
6,836
16,237
25,637
35,037
44,437
53,837
63,237
72,637
Model
RWT-CS2706
RWT-CS2707
RWT-CS2708
RWT-CS2709
RWT-CS3001
RWT-CS3002
RWT-CS3003
RWT-CS3004
RWT-CS3005
RWT-CS3006
RWT-CS3007
RWT-CS3008
RWT-CS3009
RWT-CS3301
RWT-CS2401
RWT-CS2402
RWT-CS2403
RWT-CS2404
RWT-CS2405
RWT-CS2406
RWT-CS2407
RWT-CS2408
RWT-CS2701
RWT-CS2702
RWT-CS2703
RWT-CS2704
RWT-CS2705
RWT-CS3302
RWT-CS3303
RWT-CS3304
RWT-CS3305
RWT-CS3306
RWT-CS3307
RWT-CS3308
RWT-CS3309
Diameter
286 IN
(23'-10")
322 IN
(26'-10")
358 IN
(29'-10")
394 IN
(32'-10")
To Eaves (IN)
176
220
264
308
352
396
44
264
308
352
396
44
88
132
88
132
176
220
264
308
352
396
308
352
44
88
132
176
220
44
88
132
176
220
264
Roof Only
(IN)
99
99
99
99
99
99
103.9
88.7
88.7
88.7
88.7
99
99
99
103.9
103.9
103.9
103.9
103.9
103.9
103.9
103.9
78.3
78.3
88.7
88.7
88.7
88.7
88.7
78.3
78.3
78.3
78.3
78.3
78.3
Empty Weight
(LBS)
6,123
7,575
9,312
11,467
14,047
16,609
3,481
7,878
9,638
11,563
13,873
2,799
3,676
4,671
4,435
5,711
7,297
9,189
11,365
14,185
17,017
20,176
7,469
9,021
2,375
3,071
3,973
5,007
6,318
1,648
2,249
2,943
3,765
4,911
6,064
Overall w/Roof
(IN)
275
319
363
407
451
495
148
353
397
441
485
143
187
231
192
236
280
324
368
412
456
500
386
430
133
177
221
265
309
122
166
210
254
298
342
93,234
108,772
124,311
139,850
19,184
38,368
57,552
76,735
95,919
115,103
134,287
153,471
172,655
23,212
Theoretical
Volume
(US Gallons)
12,278
24,555
36,833
49,111
61,388
73,666
85,944
98,221
15,539
31,078
46,617
62,156
77,695
46,425
69,637
92,850
116,062
139,275
162,487
185,700
208,912
88,996
104,535
120,073
135,612
13,952
33,136
52,320
71,503
90,687
109,871
129,055
148,239
167,423
16,882
Useable
Volume
(US Gallons)
8,929
21,207
33,485
45,762
58,040
70,318
82,595
94,873
11,301
26,840
42,379
57,918
73,457
40,094
63,307
86,519
109,732
132,944
156,157
179,369
202,581
Suffixes
Inlet Connection
- IS4 INLET CONNECTION – 4 INCH SIDEWALL FLANGE AND PVC CALMED INLET
- IS6
- IS8
- IS10
- IS12
INLET CONNECTION – 6 INCH SIDEWALL FLANGE AND PVC CALMED INLET
INLET CONNECTION – 8 INCH SIDEWALL FLANGE AND PVC CALMED INLET
INLET CONNECTION – 10 INCH SIDEWALL FLANGE AND PVC CALMED INLET
INLET CONNECTION – 12 INCH SIDEWALL FLANGE AND PVC CALMED INLET
- IS16 INLET CONNECTION – 16 INCH SIDEWALL FLANGE AND PVC CALMED INLET
- IF4
- IF6
- IF8
- IF10
- IF12
- IF16
INLET CONNECTION – 4 INCH FLOOR FLANGE AND PVC CALMED INLET
INLET CONNECTION – 6 INCH FLOOR FLANGE AND PVC CALMED INLET
INLET CONNECTION – 8 INCH FLOOR FLANGE
INLET CONNECTION – 10 INCH FLOOR FLANGE
INLET CONNECTION – 12 INCH FLOOR FLANGE
INLET CONNECTION – 16 INCH FLOOR FLANGE
Overflow Connection
- OS4
- OS6
- OS8
- OS10
- OS12
- OS16
OVERFLOW CONNECTION – 4 INCH SIDEWALL FLANGE
OVERFLOW CONNECTION – 6 INCH SIDEWALL FLANGE
OVERFLOW CONNECTION – 8 INCH SIDEWALL FLANGE
OVERFLOW CONNECTION – 10 INCH SIDEWALL FLANGE
OVERFLOW CONNECTION – 12 INCH SIDEWALL FLANGE
OVERFLOW CONNECTION – 16 INCH SIDEWALL FLANGE
- OF4
- OF6
- OF8
- OF10
- OF12
- OF16
OVERFLOW CONNECTION – 4 INCH FLOOR FLANGE
OVERFLOW CONNECTION – 6 INCH FLOOR FLANGE
OVERFLOW CONNECTION – 8 INCH FLOOR FLANGE
OVERFLOW CONNECTION – 10 INCH FLOOR FLANGE
OVERFLOW CONNECTION – 12 INCH FLOOR FLANGE
OVERFLOW CONNECTION – 16 INCH FLOOR FLANGE
Discharge Connections
- DS2
- DS3
- DS4
- DS6
DISCHARGE CONNECTION – SIDEWALL FLANGE 2 INCH
DISCHARGE CONNECTION – SIDEWALL FLANGE 3 INCH
DISCHARGE CONNECTION – SIDEWALL FLANGE 4 INCH
DISCHARGE CONNECTION – SIDEWALL FLANGE 6 INCH
- DF2
- DF3
- DF4
- DF6
DISCHARGE CONNECTION – 2 INCH FLOOR FLANGE
DISCHARGE CONNECTION – 3 INCH FLOOR FLANGE
DISCHARGE CONNECTION – 4 INCH FLOOR FLANGE
DISCHARGE CONNECTION – 6 INCH FLOOR FLANGE
Accessories
- JBLV
- JBHV
- LDDR
- CAGE
LOW VOLTAGE JUNCTION BOX (FOR LEVEL SENSOR CONDUCTORS)
HIGH VOLTAGE JUNCTION BOX (FOR PUMP CONDUCTORS)
EXTERIOR LADDER
EXTERIOR LADDER CAGE
Installation
- INST BASIC ONSITE TANK ASSEMBLY*
*Contact Watts for onsite assembly details and limitations.
ES-RWT-CS 1813
USA: T: (978) 689-6066 • F: (978) 975-8350 • Watts.com
Canada: T: (905) 332-4090 • F: (905) 332-7068 • Watts.ca
Latin America: T: (52) 81-1001-8600 • Watts.com
© 2018 Watts

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