thermal expansion tank
discounted thermal expansion tank

PermaSpan Expansion Tanks are designed specifically for the purpose of accomodating the natural expansion in a Hydronic Heating System. To eliminate the water logging that is troublesome but normal in a plain steel diaphragm tank, the air and water within the tank is permanently seperated by a butyle diaphragm. The tanks are light in weight, easy to install, and afford many years of trouble-free service.

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In line, diaphragm-type, pre-pressurized tank for use with domestic hot water heaters to accept the increased volume of water created when a water storage tank is heated, keeping the system below the relief valve setting. Extends water heater life and protects plumbing fixtures by controlling pressure build-up. Smothers water hammer and eliminates hot water waste. Steel shell, polypropylene liner, butyl diaphragm, brass system connection. 200 degree F maximum operating temperature, 150 PSI maximum working pressure. 40 PSI factory pre charge.

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Diaphragm type pre pressurized expansion tank specifically designed for potable hot water systems. These tanks control water pressure build up and eliminate relief valve spillage caused by thermal expansion when water is heated. 3 4” Male pipe thread connection. Requires no maintenance. Required by code in many counties and states. Use model
No. 993 024 for self piercing valve.
No. G5L: For water heaters up to 40 gallon
No. G12L: For water heaters up to 80 gallon

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Arrow’s A Series BACKSTOP system is a residential diaphragm type pre-charged thermal expansion tank designed for protection of potable hot water systems. The tank is designed for installation between the backflow preventer and the water heater to accept expanded potable hot water, keeping system pressures below relief valve settings. the water is contained in a food grade polypropylene reservoir with a patented butyl rubber diaphragm separating the expanded water from the air cushion. Features * A101 BackStop Diaphragm Type Thermal Expansion Tank * 2 Gallon Volume * Factor Pre-Charged @ 40 PSI * 304 Stainless Steel system connection * Butyl Rubber Diaphragm * Max operating temp. 200 F * Max working Pressure 150 PSI * 3 / 4″ MIP connection

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Diaphragm type pre pressurized expansion tank specifically designed for potable hot water systems. These tanks control water pressure build up and eliminate relief valve spillage caused by thermal expansion when water is heated. 3 4″ Male pipe thread conn

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Extrol 30 SpecificationsFactory pre-charged 12 psiSystem connection 1/2″ threadedMax. operating temperature 240FMax. operating pressure 100 psigExpansion tank volume 4.4 gallonsMax. accepted volume 2.5 gallonsHeight 15 1/2″Diameter 11″Shipping weight 9 lbsExtrol 30 ApplicationsClosed loop hydronic heating and radiant heating applicationsProduct LiteratureBrochure and sizing (pdf)Submittal data (pdf)Installation manual Warranty (pdf)

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