Indirect solar heating expansion tanks

SWB-18LX

The SolarWave™ 18-liter / 4.76-gallon inline expansion tank provides dependable performance for managing thermal expansion in solar systems. Constructed with a high-temperature butyl diaphragm and a patented stainless-steel water connection, it is built for reliable operation. The tank’s leak-free O-ring sealed air valve and replaceable base ensure maintenance-free usage.

Pre-charged to 1.9 bar / 28 psi and fitted with a 0.75" BSPT (c/w NPT) connection, this inline tank is ideal for solar closed-loop circuits and hydronic heating systems. Its robust carbon steel shell with dual-layer polyurethane coating ensures long-term durability and resistance to corrosion, even in demanding environments.

  • Solar closed loop circuits
  • Hydronic heating circuits

MODEL NUMBER: SWB-18LX

Temp Max: 130°C / 266°F

Pressure Pre-charge bar: 1.9 bar / 28 psi

Nominal Volume: 18 Liter / 4.76 Gallon

Connection: 0.75" BSPT (M)

Color: White

Pressure Max: 10 bar / 150 psi

Diameter: 27.9 cm / 11 in

Features & Benefits

  • High-temperature butyl diaphragm
  • Patented stainless steel water connection
  • High expansion volume factor
  • Dual layer polyurethane paint finish
  • Leak-free O-ring sealed air valve
  • Replaceable tank base
  • Comprehensive testing
  • Maintenance-free

Product Certifications

CE

Europe

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EAC

Russia

Downloads

SELL SHEET SOLARWAVE EN

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Model number: HWB-18LX
HeatWave Tank - 18 liter / 4.76 gallon inline, 0.7 bar / 10 psi, 0.75" BSPT (c/w NPT) connection, Gray finish. Durable solution for hydronic heating systems.

TEMP MAX: 99°C / 210.2°F

PRESSURE PRE-CHARGE BAR: 0.7 bar / 10 psi

NOMINAL VOLUME: 18 Liter / 4.76 Gallon

CONNECTION: 0.75" BSPT (M)

COLOR: Gray

PRESSURE MAX: 6 bar / 87 psi

DIAMETER: 27.9 cm / 11 in

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