Thermal expansion/surge reduction water tank

A thermal expansion/surge reduction water tank comprising:

• a) a hollow housing;
• b) a fluid inlet;
• c) a fluid outlet separate from the fluid inlet;
• d) a compressed air inlet;
• e) a bladder sealed to an inside of the housing having the fluid inlet and fluid outlet spaced apart from one side of the bladder and the air inlet spaced apart from another side of said bladder, wherein introduction of compressed air into the housing through the air inlet causes said bladder to abut an abutment area of said housing inside surface between the fluid inlet and said fluid outlet;
• and
• f) a plurality of fluid channels between said bladder and said housing;
• said channels formed by a plurality of protuberances disposed on a side of said bladder facing said abutment area between said inlet and said outlet when water pressure through said fluid inlet does not prevent said bladder from abutting said abutment area of said housing, thereby enabling continued fluid flow between the fluid inlet and the separate fluid outlet with said bladder abutting the abutment area of said housing.

A thermal expansion/surge reduction water tank comprising:

• a) a hollow housing;
• b) a fluid inlet;
• c) a fluid outlet separate from the fluid inlet;
• d) a compressed air inlet;
• e) a bladder sealed to an inside of the housing having the fluid inlet and fluid outlet spaced apart from one side of the bladder and the air inlet spaced apart from another side of said bladder, wherein introduction of compressed air into the housing through the air inlet causes said bladder to abut said housing in an abutment area inside surface between the fluid inlet and said fluid outlet;
• and
• f) a plurality of fluid channels between said bladder and said housing;
• said channels formed by a plurality of protuberances disposed on a side of said bladder facing said abutment area between said inlet and said outlet when water pressure through said fluid inlet does not prevent said bladder from abutting said abutment area of said housing, thereby enabling fluid flow between the fluid inlet and the separate fluid outlet with said bladder abutting the abutment area of said housing.

A water tank, comprising:

• a hollow housing comprising a top and a bottom;
• a flexible bladder sealed to an inside of the hollow housing defining an upper volume between the flexible bladder and the top of the hollow housing, and defining a lower volume between the flexible bladder and the bottom of the hollow housing;
• a fluid inlet connected to the top of the hollow housing in fluid communication with the upper volume;
• a separate fluid outlet connected to the top of the hollow housing in fluid communication with the upper volume;
• a compressed air inlet connected to the bottom of the hollow housing in pneumatic communication with the lower volume;
• and
• a plurality of fluid channels between said bladder and said housing;
• said channels formed by a plurality of protuberances disposed on a side of said bladder facing an abutment area of an inside surface of said housing between said fluid inlet and said outlet when said bladder abuts said abutment area of said housing.