BEFORE INSTALLATION
PRODUCT INSPECTION
Visually inspect the product for any signs of damage that may have occurred during transportation. If the tank is dented, bent
or scratched, return the product to the original purchase point for replacement.
PRE-CHARGE ADJUSTMENT
This expansion tank is shipped from the factory with a pre-charge of 12 psi. Any adjustments to the factory pre-charge
must be done prior to initial tank installation and with O psi pressure on the system. DO NOT ADJUST THE PRE-CHARGE
OF THE EXPANSION TANK WITH THE SYSTEM UNDER PRESSURE!
The expansion tank should be pre-charged to match the boiler fill valve setting.
failure to properly adjust the pre-charge will shorten the life expectancy of the product.
TO ADJUST TANK PRECHARGE
Remove the protective cap from the air valve.
Check the tank pre-charge pressure using a standard tire pressure gauge.
If required add air to the tank using a manual bicycle tire pump until the proper pre-charge pressure is reached.
Replace the protective cap on the air valve.
INSTALLATION
1. Drain boiler system or isolate the area where expansion
tank will be installed.
2. Install expansion tank on supply side of the boiler, on
the suction side of the circulator. Adequate thread sealant
(pipe dope) must be added to ensure a leak free
installation.
3. Connect system piping to discharge opening of the tank
using a tee, air scoop, or other suitable tapping in the
system.
4. Pressurize the system and check for leaks.
5. Restart the boiler system.
This tank is designed to be supported by system piping. Make sure
that there is adequate means of supporting the system piping and, if
necessary, add strapping, brackets, or pipe hangars.
DO NOT INSTALL THIS EXPANSION TANK IN THE HORIZONTAL
POSITION.
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TYPICAL INSTALLATIONS
Auto Fill
Valve
Air
Separator
II
Air
Vent
Flow
Check
In Line
Expansion
To
System
MAINTENANCE
This expansion tank and the entire system must be checked annually by a qualified professional.
Visually examine the tank and its connection to the system piping looking for any signs of water leakage or corrosion on the
exterior of the tank or the connection.
I
LtWARNING
I
If this expansion tank shows any visible signs of leaking, corrosion or rusting, the tank must be replaced
!
immediately to avoid personal injury or property damage. Do not adjust the tank air pressure if there
are any signs of corrosion on the tank. Failure to follow these instructions may result in serious injury or death and or
property damage.
SPECS/ DIMENSIONS
MAT ERIALS OF CONS T RU CTION
• Connection: Welded steel
• Testing: High pressure, seam weld, helium, final pre-charge check
• Tank: 16-gauge, cold rolled steel
• Finish: Appliance quality paint for corrosion resistance
• Water Chamber: Top diaphragm is 100 % butyl rubber, lower • Air Valve: Brass valve with a-ring seal
water
chamber is copolymer polypropylene
• Warranty: 5 years
•
Diaphragm Material: 100% butyl rubber
DIME NS I ONS
&
C APA CIT IES
Capacity
Acceptance
Model
(gallons)
Volume
(@12/30 PSIG)
S
33HTX15
2.1
.85
S
33HTX30
4.8
1.9
S
33HTX60
6.0
2.9
S
33HTX90
15.0
6.0
Dimensions
Max.
(inches)
Acceptance
Connection
Volume
Size
Diameter
(C)
(B)
1.0
½"MPT
8
2.4
½"MPT
11
3.6
½"MPT
11.4
6.0
¾"MPT
16
Maximum working pressure 100 psig. Maximum working temperature, 240 F. Tank pre-charge 12 psig.
Note:
S
tream33 hydrontic expansion tanks ARE NOT suitable for potable water and are only to be used on closed
systems.
QUICK SIZING CHAR T
Boiler
Copper
Output
Baseboard
Convectors & Unit
Cast Iron
Cast Iron
lO0O's
& Radiant
Heaters
Radiators
Baseboard
BTUH
25
S
33HTX 15
S
33HTX 15
S
33HTX 15
S
33HTX 15
50
S
33HTX 15
S
33HTX30
S
33HTX30
S
33HTX30
75
S
33HTX30
S
33HTX30
S
33HTX60
S
33HTX60
100
S
33HTX 30
S
33HTX30
S
33HTX60
S
33HTX60
125
S
33HTX 30
S
33HTX60
S
33HTX60
S
33HTX60
150
S
33HTX 30
S
33HTX60
S
33HTX90
S
33HTX90
175
S
33HTX60
S
33HTX60
S
33HTX90
S
33HTX90
200
S
33HTX60
S
33HTX60
S
33HTX90
S
33HTX90
stream33.com
Weight
Height
(lbs)
(A)
11.6
6
14.5
10
17.6
11
20.8
28
