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Hydropneumatic Systems

Captive Air Tank

WMTM Series

Our "WM" captive air tank series are the ideal choice for new and replacement installations for residential, light commercial and pressure boosting applications.


Low- Profile TM Series

Our "Low Profile" series are designed for height restricted applications such as mobile homes, crawl spaces and closets.

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Feature & Benefits

Corrosion-proof composite construction

  • One piece, seamless inner shell molded of premium high-density polyethylene
  • Durable blow-molded interior air cell is fully replaceable and constructed of heavy-gauge engineered polymer
  • Bottom inlet/outlet assembly is custom molded of high-impact PVC Sturdy molded polymeric base is corrosion and impact proof.
  • Outer shell is a composite of continuous fiberglass strands sealed with high-grade epoxy resin
Replaceable Air Cell
  • Greater drawdown than comparably sized steel tanks for greater efficiency
  • NSF: The entire range of WellMate Residential Captive Air tanks are listed under ANSI/NSF Standard 61 for water system components.
  • Factory Backed Warranty: Five year warranty from date of installation.
  • Light Weight minimizes labor cost; no need for heavy equipment

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Applications

• Residential   • Light Commercial   • Pressure Boosting

Specifications

WM Performance Data

Model Number
Capacity
gal / liter
Maximum
Operating Pressure
psi / kPa / Bar
Drawdown
30/50 Setting**
gal / liter
Diameter*
inch
/ cm
Overall Height*
inch / cm
Height* inlet/ outlet to floor
inch
/ cm
System
Connection
Assembly Weight*
lb / kg
Pallet
QTY.
WM-4 / WM0060
14.5 / 55
100 / 700 / 7.0
4.4 / 16.5
16 / 41
26 / 66
1 3/4 / 4.4
1" male NPT
14.5 / 6.6
9
WM-6 / WM0075
19.8 / 75
100 / 700 / 7.0
5.9 / 22.5
16 / 41
32 / 81
1 3/4 / 4.4
1" male NPT
17.75 / 8.1
9
WM-9 / WM0120
29.5 / 112
100 / 700 / 7.0
8.9 / 33.5
16 / 41
44 / 112
1 3/4 / 4.4
1" male NPT
24.75 /11.2
9
WM-12 / WM0150
40.3 / 153
100 / 700 / 7.0
12.1 / 45.8
16 / 41
57 / 145
1 3/4 / 4.4
1" male NPT
30 /13.6
9
WM-23 / WM0300
79.6 / 301
100 / 700 / 7.0
23.8 / 90.4
21 / 53
62 / 157
2 1/4 / 5.7
1 1/4" male NPT
65.7 / 29.8
4
WM-14WB / WM0180
47.1 / 178
125 / 862 / 8.6
14.1 / 53.5
21 / 53
41 1/4 / 105
2 1/4 / 5.7
1 1/4" male NPT
43 / 19.5
4
WM-20WB / WM0235
60.0 / 227
125 / 862 / 8.6
18.0 / 68.1
24 / 61
41 1/2 / 105
2 1/4 / 5.7
1 1/4" male NPT
50 /22.7
4
WM-25WB / WM0330
86.7 / 328
125 / 862 / 8.6
26.0 / 98.5
24 / 61
55 1/4 / 140
2 1/4 / 5.7
1 1/4" male NPT
72.75 / 33.0
4
WM-35WB / WM0450
119.7 / 453
125 / 862 / 8.6
35.9 / 135.9
24 / 61
74 1/4 / 189
2 1/4 / 5.7
1 1/4" male NPT
95 / 43.1
N/A

Low-Profile Performance Data

Model Number
Capacity
gal / liter
Maximum
Operating Pressure
psi / kPa / Bar
Drawdown
30/50 Setting**
gal / liter
Diameter*
inch
/ cm
Overall Height*
inch / cm
Height* inlet/
outlet to floor
inch
/ cm
System
Connection
Assembly Weight*
lb / kg
Pallet
QTY.
WM-6LP / WM-LP-075
19.3 / 73
100 / 700 / 7.0
5.8 / 21.9
24 / 61
20 1/4 / 51
2 1/4 /5.7
1" male NPT
22.75 / 10.3
8
WM-10LP / WM-LP-130
34.5 / 131
100 / 700 / 7.0
10.4 / 39.2
24 / 61
28 /71
2 1/4 /5.7
1" male NPT
29.5 / 13.4
8

Note: Maximum external operating temperature 1200F (490C). Maximum internal operating temperature 1000F (380C). Minimum operating temperature 400F (40C). * Diameter, height and weight may vary slightly without notice. ** In keeping with current industry standards, drawdown factors are based on Boyle's law. Actual drawdowns will very depending upon system variables, including the accuracy and operation of the pressure switch and gauge and operating temperature of the system.