Zilmet CAL-PRO 3/4" BSP Heating Expansion Vessel 35L to 400L
Zilmet CAL-PRO 3/4" BSP Heating Expansion Vessel 35L to 400L
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 35 litre to 400 litre CAL-PRO vessels, all supplied with 3/4" BSP connections. The 35L and 50L models are supplied with feet, while the larger sizes are suitable for floor-standing heating system installations.
Available in a range of sizes from 35 litres to 400 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 35L to 400L
- 3/4" BSP connection across this range
- 35L and 50L models supplied with feet
- Helps maintain stable system pressure
- Suitable for domestic and commercial heating applications
- Manufactured by Zilmet
Available Sizes & Dimensions
- 35L – 404mm diameter x 387mm height – SKU 1300003503
- 50L – 407mm diameter x 507mm height – SKU 1300005003
- 80L – 450mm diameter x 608mm height – SKU 1300008000
- 105L – 500mm diameter x 665mm height – SKU 1300010500
- 150L – 500mm diameter x 897mm height – SKU 1300015000
- 200L – 600mm diameter x 812mm height – SKU 1300020000
- 250L – 630mm diameter x 957mm height – SKU 1300025000
- 300L – 630mm diameter x 1105mm height – SKU 1300030000
- 400L – 630mm diameter x 1450mm height – SKU 1300040000
Typical Applications
- Sealed central heating systems
- Boiler heating circuits
- Commercial plant rooms
- Larger domestic heating systems
- Replacement heating expansion vessels
Looking for a Different CAL-PRO Vessel?
This page covers the Zilmet CAL-PRO 3/4" BSP heating expansion vessels, available from 35L to 400L.
- View the Zilmet CAL-PRO 3/4" BSP heating expansion vessels with bracket from 4L to 24L
- View the Zilmet CAL-PRO 1" BSP heating expansion vessels from 500L to 900L
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. With a broad range of capacities available, this range gives installers and specifiers flexible options for different system sizes and plant room requirements.