The Advanced Water expansion vessel is normally spherical in shape and contains a membrane or bladder. It will have a thread, normally 12.7 mm or 19.05 mm MBSP, on one end, and on the other end there will be a Schrader valve, which can be used for testing pressure or to re-instate the designated pressure required for the vessel.

Brand Name	Advanced Water
Colour	None
Material	None
Manufacturer Model No	520-147-0184
Wear Type	None
Type	Expansion Vessel
Certifications Met	None
Country of Origin	None
Protects From	None
Waterproof	None
Number of Pockets	None
Capacity	18 L
Waist Size	aa14cb94fw