- Solid copper shells manufactured to BS2870-C106.
- Carbon steel shells manufactured from boiler quality plate to BS1501-151/161-430A.
- Galvanised shells are only recommended for hard water areas. Carbon steel shells hot dip galvanised after manufacture and hydro test. Supplied with a sacrificial magnesium anode.
- Austenitic stainless steel shells in 316L or 304L Duplex stainless steel also available.
- Copper lined steel shells are the ideal choice when size and pressure dictate that solid copper becomes an expensive option. Copper lined vessels offer the dual benefit of a steel outer shell for strength and an internal copper lining for corrosion resistance. An anti-vacuum valve is fitted as standard to all vessels.