Expansion Vessels / Surge Arrestors / Accumulators / Hydrophore Tanks

Expansion Vessels are used by many water authorities, water treatment facilities and  pumping systems.  Fire control systems use them for pressurised foam and water systems. Expansion Vessels absorb fluctuations to water supply, pressure and expansion due to temperature, and absorb fluctuations to provide a constant supply. When used with water, the membrane prevents the buffer air from being absorbed into the water.

They are also used on board ship and  oil rigs.When used to supply drinking water on ships they are commonly called Hydrophores.

Abbott manufacture a range of standard vessels and also design and manufacture non standard vessels to meet customers requirements.

Our Standard range offers sizes from 100-2000 litre capacity. We offer a wide range of Design Pressures of 7, 10, 16 & 20 bar. All  vessels are fitted with replaceable rubber bladders, suitable for potable water at temperatures up to 100ºC with acceptance levels approximately 50%.

Underside of Expansion Vessel

 Design Codes

Designed and Manufactured to PD5500, BS5169, DNV GL, BV, ASME, Lloyds 2/2, ABS and many others

For more information, please click – Expansion Vessel, PDF. Bladder Type  –Expansion Vessel Installation Instructions.



Finished in exterior quality enamel gloss paint (primer on request.) Alternatively paint  can be to your own specification inside and out.  DWI approved paint spec is also available as an option.

Also called: Accumulators, Surge arrestors, Pressure Vessels, thermal expansion, hydro pneumatic, Surge Tanks, Process Tanks.


Expansion vessels/Hydrophore Tanks have Lifting eyes provided for convenience.

Special Expansion Vessels to customers specific requirements and also to higher pressure ratings can be Designed and manufactured.

For more information on our product range, click Pressure vessels.