Zilmet CAL-PRO 1" BSP Heating Expansion Vessel 500L to 900L
Zilmet CAL-PRO 1" BSP Heating Expansion Vessel 500L to 900L
The Zilmet CAL-PRO heating expansion vessel is designed for use in sealed heating systems, helping to absorb the increase in water volume as the system temperature rises. This helps maintain stable system pressure and reduces unnecessary stress on boilers, pumps and other heating components.
This product page covers the larger 500 litre to 900 litre CAL-PRO vessels, all supplied with 1" BSP connections. These larger capacity vessels are suitable for floor-standing installation in commercial plant rooms, larger heating systems and higher volume sealed heating circuits.
Available in a range of sizes from 500 litres to 900 litres, the correct vessel size can be selected from the dropdown menu before ordering. Please check the selected size carefully, as dimensions vary depending on the vessel capacity.
Key Features
- Suitable for sealed heating systems
- Available from 500L to 900L
- 1" BSP connection across this range
- Large capacity floor-standing design
- Helps maintain stable system pressure
- Suitable for commercial and larger heating applications
- Manufactured by Zilmet
Available Sizes & Dimensions
- 500L – 750mm diameter x 1340mm height – SKU 1300050000
- 600L – 750mm diameter x 1555mm height – SKU 1300060000
- 700L – 750mm diameter x 1755mm height – SKU 1300070000
- 800L – 750mm diameter x 1855mm height – SKU 1300080000
- 900L – 750mm diameter x 2105mm height – SKU 1300090000
Typical Applications
- Commercial sealed heating systems
- Large boiler heating circuits
- Plant room installations
- Higher volume heating systems
- Replacement heating expansion vessels
Looking for a Different CAL-PRO Vessel?
This page covers the Zilmet CAL-PRO 1" BSP heating expansion vessels, available from 500L to 900L.
- View the Zilmet CAL-PRO 3/4" BSP heating expansion vessels with bracket from 4L to 24L
- View the Zilmet CAL-PRO 3/4" BSP heating expansion vessels from 35L to 400L .
Why Choose a Zilmet CAL-PRO Expansion Vessel?
Zilmet CAL-PRO expansion vessels are a reliable choice for closed heating systems where pressure control, durability and correct system protection are important. The larger 500L to 900L vessels provide increased capacity for commercial and high-volume heating systems where a smaller vessel would not be suitable.