A.Y. McDonald Hydronic Expansion Tank - 2-5 Gal

A.Y. McDonald Series 16 hydronic expansion tanks absorb the thermal expansion of water in closed hot water heating loops, holding system pressure steady and protecting the boiler relief valve from weeping. Diaphragm design with a 1/2 in male system connection, sized for residential boilers and small hydronic zones.

• For closed-loop heating systems; not for potable water distribution.
• Factory pre-charged; verify and adjust pre-charge to your pressure switch setting at installation.
• Series 16 model coding: base P plastic, M metal; position V vertical, H horizontal; connection size 2 = 1/2 in, 3 = 3/4 in, 4 = 1 in, 5 = 1-1/4 in; M male, F female.

A.Y. McDonald Pressure Tank Guide (PDF)

Need help sizing a pressure tank? Email sales@watermainsupply.com or call 281.664.8000 with your pump model and drawdown requirement.