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Pentair Wellmate WM Series Tanks

Captive Air and Retention Tanks

Our WM-Series offers features and benefits steel tanks just can’t match. From corrosion-proof composite construction, to lighter weight, easier maintenance and less expensive installation, WM-Series pressure tanks are the preferred choice of professionals.

  • Greater drawdown than comparably sized steel tanks yields greater efficiency.
  • Quicker and less costly to install, usually requiring only one person and fewer man-hours.
  • Wider pressure setting differential provides greater flexibility.
  • Residential, Light Commercial and Pressure Boosting Applications.

WM Series Features & Benefits

Specifications

TYPE:Quick Connect
Item #CAPACITYMAXIMUM OPERATING PRESSUREDRAWDOWN INDIAMETER INCH CMOVERALL HEIGHT INCH CMHEIGHT INLET OUTLET TO FLOORCONNECTIONSASSEMBLY WEIGHTPALLET QUANTITY
WM-4 WM0060 QC14.5 / 55125 / 862 / 8.64.5 / 17.016 / 4126 / 661 3/4 / 4.41" male NPT16.9 / 7.69
WM-6 WM0075 QC19.6 / 75125 / 862 / 8.66.1 / 34.416 / 4132 / 811 3/4 / 4.41" male NPT20.85 / 9.59
WM-9 WM0120 QC29.5 / 112125 / 862 / 8.69.1 / 34.416 / 4144 / 1121 3/4 / 4.41" male NPT28.80 / 13.09
WM-12 WM0150 QC40.3125 / 862 / 8.612.5 / 47.316 / 4157 / 1451 3/4 / 4.41" male NPT35.05 / 15.99
WM-14WB WM0180 QC47.1 / 178125 / 862 / 8.614.6 / 55.321 / 5341.3 / 1052 1/4 / 5.71 1/4" male NPT46.27 / 21.04
WM-20WB WM0235 QC60.0 / 227125 / 862 / 8.624 / 6124 / 6141.5 / 1052 1/4 / 5.71 1/4" male NPT52.87 / 24.04
WM-23 WM0300 QC79.6 / 301125 / 862 / 8.618.5 / 70.021 / 5362 / 1572 1/4 / 5.71 1/4" male NPT77.22 / 35.04
WM-25WB WM0330 QC86.7 / 328125 / 862 / 8.626.8 / 101.524 / 6155 1/4 / 1402 1/4 / 5.71 1/4" male NPT77.2 / 35.04
WM-35WB WM0450 QC119.7 / 453125 / 862 / 8.637.0 / 140.124 / 6174 1/4 / 1892 1/4 / 5.71 1/4" male NPT102 / 46.4N/A
TYPE:Classic
Item #CAPACITYMAXIMUM OPERATING PRESSUREDRAWDOWN INDIAMETER INCH CMOVERALL HEIGHT INCH CMHEIGHT INLET OUTLET TO FLOORCONNECTIONSASSEMBLY WEIGHTPALLET QUANTITY
WM-4 WM0060 C14.5 / 55125 / 862 / 8.64.5 / 17.016 / 4126 / 661 3/4 / 4.41" male NPT14.5 / 6.69
TYPE:Quick Connect
Item #CAPACITYMAXIMUM OPERATING PRESSUREDRAWDOWN INDIAMETER INCH CMOVERALL HEIGHT INCH CMHEIGHT INLET OUTLET TO FLOORCONNECTIONSASSEMBLY WEIGHTPALLET QUANTITY
WM-4 WM0060 QC14.5 / 55125 / 862 / 8.64.5 / 17.016 / 4126 / 661 3/4 / 4.41" male NPT16.9 / 7.69
WM-6 WM0075 QC19.6 / 75125 / 862 / 8.66.1 / 34.416 / 4132 / 811 3/4 / 4.41" male NPT20.85 / 9.59
WM-9 WM0120 QC29.5 / 112125 / 862 / 8.69.1 / 34.416 / 4144 / 1121 3/4 / 4.41" male NPT28.80 / 13.09
WM-12 WM0150 QC40.3125 / 862 / 8.612.5 / 47.316 / 4157 / 1451 3/4 / 4.41" male NPT35.05 / 15.99
WM-14WB WM0180 QC47.1 / 178125 / 862 / 8.614.6 / 55.321 / 5341.3 / 1052 1/4 / 5.71 1/4" male NPT46.27 / 21.04
WM-20WB WM0235 QC60.0 / 227125 / 862 / 8.624 / 6124 / 6141.5 / 1052 1/4 / 5.71 1/4" male NPT52.87 / 24.04
WM-23 WM0300 QC79.6 / 301125 / 862 / 8.618.5 / 70.021 / 5362 / 1572 1/4 / 5.71 1/4" male NPT77.22 / 35.04
WM-25WB WM0330 QC86.7 / 328125 / 862 / 8.626.8 / 101.524 / 6155 1/4 / 1402 1/4 / 5.71 1/4" male NPT77.2 / 35.04
WM-35WB WM0450 QC119.7 / 453125 / 862 / 8.637.0 / 140.124 / 6174 1/4 / 1892 1/4 / 5.71 1/4" male NPT102 / 46.4N/A
TYPE:Classic
Item #CAPACITYMAXIMUM OPERATING PRESSUREDRAWDOWN INDIAMETER INCH CMOVERALL HEIGHT INCH CMHEIGHT INLET OUTLET TO FLOORCONNECTIONSASSEMBLY WEIGHTPALLET QUANTITY
WM-4 WM0060 C14.5 / 55125 / 862 / 8.64.5 / 17.016 / 4126 / 661 3/4 / 4.41" male NPT14.5 / 6.69
WM-6 WM0075 C19.8 / 75125 / 862 / 8.66.1 / 34.416 / 4132 / 811 3/4 / 4.41" male NPT17.75 / 8.19
WM-9 WM0120 C29.5 / 112125 / 862 / 8.69.1 / 34.416 / 4157 / 1451 3/4 / 4.41" male NPT24.75 / 11.29
WM-12 WM0150 C40.3 / 153125 / 862 / 8.612.5 / 47.316 / 4157 / 1451 3/4 / 4.41" male NPT65.7 / 298.89
WM-14WB WM0180 C47.1 / 178125 / 862 / 8.614.6 / 55.321 / 5341.3 / 1052 1/4 / 5.71 1/4" male NPT50 / 22.74
WM-20WM WM0235 C60.0 / 227125 / 862 / 8.618.5 / 70.024 / 6141.5 / 1052 1/4 / 5.71 1/4" male NPT72.75 / 33.04
WM-23 WM0300 C79.6 / 301125 / 862 / 8.624.6 / 93.121 / 5362 / 1572 1/4 / 5.71 1/4" male NPT43 / 19.54
WM-25WB WM0330 C86.7 / 328125 / 862 / 8.626.8 / 101.524 / 6155 1/4 / 1402 1/4 / 5.71 1/4" male NPT72.75 / 33.04
WM-35WB WM0450 C119.7 / 453125 / 862 / 8.637.0 / 140.124 / 6174 1/4 / 1892 1/4 / 5.71 1/4" male NPT102 / 46.4N/A

Note: Maximum external operating temperature 120°F (49°C). Maximum internal operating temperature 100°F (38°C). Minimum operating temperature 40°F (4°C).

* 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 vary depending upon system variables, including the accuracy and operation of the pressure switch and gauge and operating temperature of the system.