Email: - Phone: 610-666-1220


ASME Buffer Tanks

Buffer tanks are designed to ensure that sufficient water volume is available to maintain optimum temperature control in a closed loop chilled or hot water system.  By adding the proper amount of system water, the source temperature can be reached quickly.

Our chilled water buffer tank are available for use in chilled water systems.  The tanks have an inlet connection located at the top of the shell.  The water entering the tank is diffused by the center baffle plate and the separated air is vented out the top of the tank.  The heavier air-free water moves to the bottom of the tank and exits through the top outlet connection.

Our boiler buffer tanks are available for use in hot water systems.  Having the right water volume increases the thermal mass and flywheel effect.  Due to water’s very high thermal capacity, thermal mass can store and even out fluctuations in temperature.

Factory installed flexible elastomeric insulation (1/2″, 3/4″, 1″ & 2″ thicknesses) and white paint finish are available upon request, and information on each is below.

Submittal Sheets

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The John Wood Company, LLC

Phone (610) 666-1220
Fax (610) 666-0193
Toll Free (800) 537-5581

Remit To:

The John Wood Company
PO Box 644250
Pittsburgh, PA 15264

Mail to:

The John Wood Company
PO Box 364
98 Highland Avenue
Oaks, PA 19456

Ship To:

The John Wood Company
Highland Business Park
98 Highland Avenue
Oaks, PA 19456-1052

NOTE: We are NOT affiliated with the John Wood Water Heater Company of Canada. They may be contacted at 1-888-599-2837, e-mail at or at