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50 Gallon Stainless Steel Hydronic Buffer Tank
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50 Gallon Stainless Steel Hydronic Buffer Tank

50 Gallon Stainless Steel Hydronic Buffer Tank
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$1,969.76 each
In Stock
In Stock
Get 6 Mon, Mar 27 - Wed, Mar 29

Lift Gate

This product weighs 70 lbs. and may require the use of a lift gate. If you do require a lift gate at your delivery, you'll have the option to add this FREE of charge when you checkout.
Free Shipping This item ships free
Easy Returns No restocking fee for 90 days

Product Highlights

Capacity (Gallons) icon
50 Gallons
Diameter (Inches) icon
20" Diameter


Lochinvar's Stainless Steel Buffer Tanks are designed provide thermal storage volume and hydraulic separation of the boiler or heat pump and the building distribution system. A properly applied buffer tank will reduce cycling (short cycling), which will lead to longer runtimes, higher efficiencies and longer equipment life. Squire buffer tanks can be used in geothermal, chilled applications, and any system with low-mass boilers.

Thermal Storage
Hydronic buffer tanks are utilized to provide thermal storage volume when the system demand is less than the lowest firing rate of the boiler. This occurs most often when there are "micro" zones in the distribution system whose demand is below the minimum firing of the boiler. Under these conditions the boiler fires at its minimum rate, which is more energy than can be absorbed by the distribution system, and shuts off because of high return temperatures before the "micro" zone's call for heat is satisfied. The boiler system continues to receive a call for heat and fires again. The "micro" zone cannot absorb all the energy produced by the boiler, and again the boiler shuts off because of high return temperatures. With the volume provided by the tank the additional energy not utilized by the "micro" zone can be stored in the buffer tank and used when there are additional heating demands.

Hydraulic Separation
Lochinvar's Squire Buffer tanks also function as hydraulic separators, effectively separating the flow in the boiler loop from the flow in the distribution system. This is beneficial when the flow rate in the distribution system is different than the flow rate of the boiler system. It can be very important when there is a variable speed pump in the distribution system whose flow rate can be less than that of the boiler pump.

Standard Features
  • R-13.4 insulation for minimal heat loss
  • Textured, impact resistant polymer jacket
  • Light-weight 316L stainless steel tank construction
  • Bulbwell
  • Drain and air vent connections
  • 5 year tank warranty
*Image depicted may not represent actual product*


Capacity (Gallons):


Supply Connection:

1-1/2" NPT

Return Connection:

1-1/2" NPT

Diameter (Inches):


Product Type:

Buffer Tank

Weight (lbs):

70 lbs


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On orders over $99
We offer flexible shipping and scheduling options, up-to-date delivery estimates, and free ground shipping on any order over $99 to make sure your order gets to you on-time, for less.
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Easy Returns
Returning items is as simple as 1-2-3
Ordered the wrong product? Item damaged in transit? Our 3-step process makes returning products easy – even up to a year after purchase – with no restocking fees on returns made within 90 days.
Return Policy