Approved Vendor 12-A102

BackStop® A Series Tanks are fixed-diaphragm type, precharged thermal expansion tanks that are designed to absorb the expansion forces and control the pressure in potable water systems. Water is contained using the heavy-duty diaphragm with a FDA grade polypropylene liner preventing tank corrosion and waterlogging problems.

The shell is designed from carbon steel and the system connection is 304 Stainless Steel. The A Series has a triple layer coating of electrostatic almond paint. The diaphragm is made from heavy duty Butyl rubber and the liner material an FDA grade Polypropylene.

All A-Series are factory pre-set pressure of 35 PSI, but have a maximum operating pressure of 150 PSI with a maximum design temperature of 200F

• Liner Material: FDA Grade Polypropylene
• Diaphragm: Heavy Duty Butyl Rubber
• System Connection: 304 Stainless Steel
• Coating: Triple Layer Electrostatic Almond Paint
• Shell: Carbon Steel

• Specification Sheet https://www.capitolgroupinc.com//ASSETS/DOCUMENTS/ITEMS/EN/product_sheet_thermal_expansion.pdf
• Submittal Sheet https://www.capitolgroupinc.com//ASSETS/DOCUMENTS/ITEMS/EN/2022-Submittals-ThermarlExpansionTanks.pdf