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Exp. Tanks & Air Elim.

Air Eliminators, Hydrolic Separators, Expansion Tanks and Boiler Header Packages - Required components for closed loop heating systems. | Pexheat.com

Air elimination is critical in radiant floor heating systems. A 1/4 in. bubble in 1/2 in tubing can cause a significant flow restriction. So getting a good air eliminator is a key component in the heater installation.

Sizing an Expansion Tank
You need an expansion tank if you have a closed system. A closed system maintains the same fluid in it at all times. When the water is heated and expands, it needs a place to go, and the expansion tank fills that role. In contrast, an open system has water entering it via the municipal supply and water leaving it via plumbing fixtures. An open boiler (such as an outdoor, non-pressurized wood furnace) is also an open system. If you have a backflow preventer, this creates a closed system and you will need a tank even if you have a direct system.

To size your expansion tank‚ you first need to know how much water is in the system. See below:

Total Length of 1/2 in.pipe x .00921 = ______ Gallons
Total Length of 3/4 in.pipe x .01837 = ______ Gallons
Total Length of 1 in.pipe x .03025 = ______ Gallons
Size of water heater or boiler = ______ Gallons
Total System Volume = _____ X .088
Minimum Expansion Tank Size = _____ Gallons (round up)

Add anti-freeze to your heating system to protect against pipe bursting or for operation at temperatures below freezing like in snow melting systems. Don't forget a refractometer for measuring anti-freeze concentrations.

Contact us for product selection. We are glad to help.

Image Model Name Price Add to Cart
PLT.jpg PLT-5-M1 Watts 2.1 Gallon Domestic Expansion Tank Price: $36.23
 
et.jpg ETX15 Watts 2.1 Gallon Expansion Tank Price: $35.04
 
etx-30.png ETX30 Watts 4.5 Gallon Expansion Tank Price: $44.31
 
et.jpg ETX60 Watts 6 Gallon Expansion Tank Price: $92.25
 
et.jpg ETX90 Watts 15 Gallon Expansion Tank Price: $176.24
 
et.jpg ETSX-30 Watts 15 Gallon Expansion Tank, Floor Standing Price: $206.40
 
et.jpg ETSX-40 Watts 20 Gallon Expansion Tank, Floor Standing Price: $217.34
 
et.jpg ETSX-60 Watts 33 Gallon Expansion Tank, Floor Standing Price: $278.00
 
et.jpg ETSX-90 Watts 44 Gallon Expansion Tank, Floor Standing Price: $506.40
 
et.jpg ETSX-110 Watts 62 Gallon Expansion Tank, Floor Standing Price: $591.20
 
et.jpg ETSX-160 Watts 81 Gallon Expansion Tank, Floor Standing Price: $631.60
 
supervent.bmp PV075 Honeywell 3/4" NPT SuperVent Air Eliminator Price: $89.90
 
supervent.bmp PV100 Honeywell 1" NPT SuperVent Air Eliminator Price: $104.79
 
supervent.bmp PV125 Honeywell 1-1/4" NPT SuperVent Air Eliminator Price: $131.30
 
supervent.bmp PV150 Honeywell 1-1/2" NPT SuperVent Air Eliminator Price: $179.06
 
B911S.jpg B911-M3 Bronze Combination Fill Valve and Backflow Preventers Price: $124.50
 
HP-BHM-75.jpg HP-BHM-75 Watts 3/4 in. Boiler Header Module Price: $171.14
 
HP-BHM-75.jpg HP-BHM-100 Watts 1 in. Boiler Header Module Price: $176.54
 
HP-BHM-75.jpg HP-BHM-125 Watts 1-1/4 in. Boiler Header Module Price: $181.55
 
HP-30PRO-P100.jpg HP-30PRO-P125 Watts 1-1/4 in. Pro Hydronic Package Price: $288.43
 
HP-30PRO-P100.jpg HP-30PRO-P100 Watts 1 in. Pro Hydronic Package Price: $283.41
 
hydraulicseparator-union.jpg HSep100U Watts Radiant 1 in. Hydraulic Separator, Sweat Union Price: $444.60
 
hydraulicseparator-union.jpg HSep125U Watts Radiant 1-1/4 in. Hydraulic Separator, Sweat Union Price: $501.40
 
hydraulicseparator-union.jpg HSep150U Watts Radiant 1-1/2 in. Hydraulic Separator, Sweat Union Price: $636.45
 
hydraulicseparator-flanged.jpg HSep200F Watts Radiant 2 in. Hydraulic Separator, ANSI Flange Price: $1,276.43
 
hydraulicseparator-flanged.jpg HSep250F Watts Radiant 2-1/2 in. Hydraulic Separator, ANSI Flange Price: $1,632.02
 
cryotek.jpg 35260 45% Pre-mix Cryo-tek Propylene Glycol Anti-freeze, 5 gal. Price: $82.18
 
cryotek_drum.jpg 35267 45% Pre-mix Cryo-tek Propylene Glycol Anti-freeze, 55 gal Price: $806.78
 
cryotek-ag5.jpg 35285 Cryo-tek AG, 100% Blue Propylene Glycol Anti-freeze, 5 gal Price: $123.90
 
cryotek-ag.jpg 35282 Cryo-tek AG, 100% Blue Propylene Glycol Anti-freeze, 1 gal Price: $24.78
 
cryotek_drum.jpg 35288 Cryo-tek AG, 100% Blue Propylene Glycol Anti-freeze, 30 gal Price: $743.41
 
cryotek_drum.jpg 35289 Cryo-tek AG, 100% Blue Propylene Glycol Anti-freeze, 55 gal Price: $1,282.61
 
boiler-header.png BH2Z0605 2 Branch Boiler Header, 1-1/4 in. X 1 in., 12 in. Long Price: $34.38
 
boiler-header.png BH3Z0605 3 Branch Boiler Header, 1-1/4 in. X 1 in., 18 in. Long Price: $47.52
 
boiler-header.png BH2Z0604 2 Branch Boiler Header, 1-1/4 in. X 3/4 in., 12 in. Long Price: $30.48
 
boiler-header.png BH2Z0705 2 Branch Boiler Header, 1-1/2 in. X 1 in., 12 in. Long Price: $41.43
 
boiler-header.png BH3Z0604 3 Branch Boiler Header, 1-1/4 in. X 3/4 in., 18 in. Long Price: $45.78
 
boiler-header.png BH3Z0704 3 Branch Boiler Header, 1-1/2 in. X 3/4 in., 18 in. Long Price: $57.60
 
boiler-header.png BH3Z0705 3 Branch Boiler Header, 1-1/2 in. X 1 in., 18 in. Long Price: $57.60
 
boiler-header.png BH4Z0604 4 Branch Boiler Header, 1-1/4 in. X 3/4 in., 24 in. Long Price: $58.26
 
boiler-header.png BH4Z060405 4 Branch Boiler Header, 1-1/4 in. with 3-3/4 in. & 1-1 in. Outlets, 24 in. Long Price: $61.44
 
boiler-header.png BH4Z0605 4 Branch Boiler Header, 1-1/4 in. X 1 in., 24 in. Long Price: $64.17
 
boiler-header.png BH4Z0704 4 Branch Boiler Header, 1-1/2 in. X 3/4 in., 24 in. Long Price: $66.33
 
boiler-header.png BH4Z0705 4 Branch Boiler Header, 1-1/2 in. X 1 in., 24 in. Long Price: $86.88