Q: What do I precharge my hydronic expansion tank to?
A: The precharge of your hydronic expansion tank needs to be matched to the fill pressure of the boiler or heating system. Most residential applications will vary between 12-18 PSI fill pressures.

Q: Where should my hydronic expansion tank be located?
A: Your hydronic expansion tank should be located on the suction side of the pumps or circulators. This is known as the point of no pressure change. This is also commonly an ideal location for the fill valve and air elimination equipment.

Q: Does orientation matter on my hydronic expansion tank?
A: Yes! Your hydronic expansion tank should always be installed in the vertical, downward orientation.

Q: What is an Insight Cap?
A: The Insight Cap, found on Extrol and Extrol PRO, is an easy warning indicator that your expansion tank needs to be serviced or replaced. When your expansion tank needs replacement, the Insight Cap will turn a red/orange color.

Q: When do I need an Extrol PRO?
A: The Extrol PRO includes an oxygen barrier liner and stainless-steel connection. These features are beneficial for high efficiency heating systems, radiant heating, and solar applications.