Email: - Phone: 610-666-1220


We recognize that an increasing number of buying decisions are made based on product availability and lead times.  That’s why we’ve increased our inventory of ASME tanks, air separators, and accessories designed for HVAC applications.

Our standard air separators are available in sizes up to 24″ and our bladder type expansion and hydro-pneumatic tanks range in size from 10 gallon to 3,963 gallons.  All of our standard designs can be built-to-order with higher working pressures and standard options such as SS construction, interior epoxy linings, exterior finishes, specialty bladder materials, and seismic designs.

We offer same day shipments for orders that are received prior to 11 AM.  Please contact us to check availability.


  • Tangential air separators
  • Non-code air purgers
  • Bladder type expansion tanks
  • Bladder type hydro-pneumatic tanks
  • Bladder type thermal expansion tanks
  • Plain steel expansion/compression tanks
  • Chilled Water Buffer tanks
  • Vertical flash tanks
  • Horizontal flash tanks
  • Glycol Make-up units
  • Chemical shot feeders
  • High capacity air vents
  • Tank fittings with drains and shut-off valves
  • Sight glasses and liquid level gauge assemblies
  • Saddles for horizontal tanks

Submittal Sheets:


Air Separators

Bladder Type Expansion Tanks

Bladder Type Hydro-Pneumatic Tanks

More Photos:

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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