# Expansion tanks

> GWS HeatWave and SolarWave expansion vessels for sealed heating systems and solar collectors. Help with sizing, Nova Poshta delivery across Ukraine.

[Catalogue](https://watertrade.com.ua/en/catalogue.md) › [Expansion tanks](https://watertrade.com.ua/en/catalogue/rassiritelnye-baki.md)

Web page: https://watertrade.com.ua/en/catalogue/rassiritelnye-baki/products · Other languages: [UA](https://watertrade.com.ua/catalogue/rassiritelnye-baki/products.md), [RU](https://watertrade.com.ua/ru/catalogue/rassiritelnye-baki/products.md)

In a sealed heating system water expands as it heats up, and the extra volume has to go somewhere — otherwise the pressure rises and the boiler safety valve opens. An expansion vessel takes up the excess water and returns it to the system as it cools.

Here you will find GWS **HeatWave** vessels for boilers and radiators and **SolarWave** vessels for solar systems, where the fluid runs hotter. A simple sizing rule: the vessel volume is 10–12% of the water in the system; a 24 kW boiler with radiators usually needs 24–35 L.

See the detailed calculation and connection diagram in [“Heating expansion vessel”](https://watertrade.com.ua/en/articles/article/rasshiritelnyj-bak-otopleniya).

## Products (15)

- [Solar expansion tank GWS SWB100LV, 100 L](https://watertrade.com.ua/en/catalogue/rassiritelnye-baki/product/rassiritelnyj-bak-dla-geliosistem-gws-swb100lv-100-l.md) — 19 399 UAH; Series: SolarWave; Volume: 100 L; Tank material: steel; Max. pressure: 10 bar
- [Solar expansion tank GWS SWB12LX, 12 L](https://watertrade.com.ua/en/catalogue/rassiritelnye-baki/product/rassiritelnyj-bak-dla-geliosistem-gws-swb12lx-12-l.md) — 2 880 UAH; Series: SolarWave; Volume: 12 L; Tank material: steel; Max. pressure: 10 bar
- [Solar expansion tank GWS SWB18LX, 18 L](https://watertrade.com.ua/en/catalogue/rassiritelnye-baki/product/rassiritelnyj-bak-dla-geliosistem-gws-swb18lx-18-l.md) — 2 997 UAH; Series: SolarWave; Volume: 18 L; Tank material: steel; Max. pressure: 10 bar
- [Solar expansion tank GWS SWB24LX, 24 L](https://watertrade.com.ua/en/catalogue/rassiritelnye-baki/product/rassiritelnyj-bak-dla-geliosistem-gws-swb24lx-24-l.md) — 3 811 UAH; Series: SolarWave; Volume: 24 L; Tank material: steel; Max. pressure: 10 bar
- [Solar expansion tank GWS SWB35LX, 35 L](https://watertrade.com.ua/en/catalogue/rassiritelnye-baki/product/rassiritelnyj-bak-dla-geliosistem-gws-swb35lx-35-l.md) — 5 122 UAH; Series: SolarWave; Volume: 35 L; Tank material: steel; Max. pressure: 10 bar
- [Solar expansion tank GWS SWB60LV, 60 L](https://watertrade.com.ua/en/catalogue/rassiritelnye-baki/product/rassiritelnyj-bak-dla-geliosistem-gws-swb60lv-60-l.md) — 14 593 UAH; Series: SolarWave; Volume: 60 L; Tank material: steel; Max. pressure: 10 bar
- [Solar expansion tank GWS SWB80LV, 80 L](https://watertrade.com.ua/en/catalogue/rassiritelnye-baki/product/rassiritelnyj-bak-dla-geliosistem-gws-swb80lv-80-l.md) — 12 075 UAH; Series: SolarWave; Volume: 80 L; Tank material: steel; Max. pressure: 10 bar
- [Heating expansion tank GWS HWB100LV, 100 L](https://watertrade.com.ua/en/catalogue/rassiritelnye-baki/product/rassiritelnyj-bak-dla-otoplenia-gws-hwb100lv-100-l.md) — 20 864 UAH; Series: HeatWave; Volume: 100 L; Tank material: steel; Max. pressure: 6 bar
- [Heating expansion tank GWS HWB12LX, 12 L](https://watertrade.com.ua/en/catalogue/rassiritelnye-baki/product/rassiritelnyj-bak-dla-otoplenia-gws-hwb12lx-12-l.md) — 2 910 UAH; Series: HeatWave; Volume: 12 L; Tank material: steel; Max. pressure: 6 bar
- [Heating expansion tank GWS HWB150LV, 150 L](https://watertrade.com.ua/en/catalogue/rassiritelnye-baki/product/rassiritelnyj-bak-dla-otoplenia-gws-hwb150lv-150-l.md) — 15 871 UAH; Series: HeatWave; Volume: 150 L; Tank material: steel; Max. pressure: 6 bar
- [Heating expansion tank GWS HWB18LX, 18 L](https://watertrade.com.ua/en/catalogue/rassiritelnye-baki/product/rassiritelnyj-bak-dla-otoplenia-gws-hwb18lx-18-l.md) — 3 252 UAH; Series: HeatWave; Volume: 18 L; Tank material: steel; Max. pressure: 6 bar
- [Heating expansion tank GWS HWB24LX, 24 L](https://watertrade.com.ua/en/catalogue/rassiritelnye-baki/product/rassiritelnyj-bak-dla-otoplenia-gws-hwb24lx-24-l.md) — 4 237 UAH; Series: HeatWave; Volume: 24 L; Tank material: steel; Max. pressure: 6 bar
- [Heating expansion tank GWS HWB35LX, 35 L](https://watertrade.com.ua/en/catalogue/rassiritelnye-baki/product/rassiritelnyj-bak-dla-otoplenia-gws-hwb35lx-35-l.md) — 5 736 UAH; Series: HeatWave; Volume: 35 L; Tank material: steel; Max. pressure: 6 bar
- [Heating expansion tank GWS HWB60LV, 60 L](https://watertrade.com.ua/en/catalogue/rassiritelnye-baki/product/rassiritelnyj-bak-dla-otoplenia-gws-hwb60lv-60-l.md) — 10 452 UAH; Series: HeatWave; Volume: 60 L; Tank material: steel; Max. pressure: 6 bar
- [Heating expansion tank GWS HWB80LV, 80 L](https://watertrade.com.ua/en/catalogue/rassiritelnye-baki/product/rassiritelnyj-bak-dla-otoplenia-gws-hwb80lv-80-l.md) — 8 759 UAH; Series: HeatWave; Volume: 80 L; Tank material: steel; Max. pressure: 6 bar

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