Installation
Install the solar expansion tank on a stable wall position determined by the length of the flexible
tubing after connecting one end to the pump station safety group connection port 3/4" M thread
inserting flat gasket into the 3/4" F expansion tank connection nut. Mark the location and drill for the
mounting screws 5/16" x 2" (8 mm x 50 mm) and secure the bracket to the wall. Insert the hexagonal
double check valve into the bracket, Fig. 1,
and tighten nut (A) to the bracket, Fig. 2.
Insert flat gasket into the 3/4" F expansion
tank connection nut and insert flat gasket into
3/4" F thread of double check valve and
thread
on
expansion
tank
connect
to
expansion tank.
Expansion Tank Connection Kit
28120
.0
2
www.caleffi.com
CALEFFI
Series 255
stainless steel
- Wall bracket:
steel
- Flat gaskets:
Superinterite
- Double check valve:
brass
Medium:
water and glycol
Maximum percent of glycol:
50 %
Maximum working pressure:
150 psi (10 bar)
Max. working temperature of automatic double check valve:
230°F (110°C)
Bracket length:
10 inch (250 mm)
Flexible tube length:
24 inch (610 mm)
Maximum expansion tank size for wall bracket is 7 gallons (25 l).
Connections:
3/4“ straight thread
1
Product Range
255
007
255
Function
Expansion
tank
connection
kit
is
designed
for
use
with
Caleffi
solar
expansion
tank
series
259,
sizes
3
-
7
gallons.
The
kit
consisting
of
a
flexible
stainless
steel
hose,
a
double
automatic
check
valve,
flat
gaskets,
wall
bracket
and
mounting
hardware,
helps
reduce
installation
time
and
provides
suitable
mounting.
Technical
Specifications
Mater
i
als:
-
Flexible
tubing:
Fig. 1
Fig. 2
Fig. 3
A
©
Copyright
20
18
Caleffi
These items are designed for use in closed systems. Do not use in plumbing applications. These
items do not meet the low-lead plumbing standards of U.S. and Canada.
