13. Accessories
13.1 Unions and valve kits
The accessory is used to connect the pump to the pipes.
The union nut must be fitted to the pump while the union tail is
connected to the pipes.
The accessory set includes everything you need for installation.
Product numbers, unions
Rp
Pump type
Connection
3/4"
1"
1 1/4"
25-xx
G 1 1/2
529921
529922
529821
25-xx N
529971
529972
-
32-xx
G 2
-
509921
509922
R
Pump type
Connection
1"
1 1/4"
25-xx
G 1 1/2
529925
529924
25-xx N
-
-
32-xx
G 2
-
-
Rp
Pump type
Connection
3/4"
1"
1 1/4"
25-xx
G 1 1/2
-
-
-
25-xx N
519805
519806
519807
32-xx
G 2
-
-
-
mm
Pump type
Connection
Ø22
Ø28
25-xx
G 1 1/2
-
-
25-xx N
519808
519809
32-xx
G 2
-
-
mm
Pump type
Connection
Ø18
Ø22
Ø28
25-xx
G 1 1/2
-
-
-
25-xx N
529977
529978
529979
32-xx
G 2
-
-
-
G-threads have a cylindrical form in accordance with the EN ISO
228-1 standard and are not sealing the thread. It requires a flat
gasket. You can only screw male G-threads (cylindrical) into female
G-threads. The G-threads are standard thread on the pump
housing.
R-threads are tapered external threads in accordance with the EN
10226-2 standard.
Rc- or Rp-threads are internal threads with either tapered or
cylindrical (parallel) threads. You can screw male R-threads
(conical) into female Rc- or Rp-threads.
R
R
Rp
G
Rc
Rp
R
TM077426
Thread types and combinations (examples)
13.2 Insulating shells
The insulating shells, which are tailored to the individual pump type,
can be ordered as accessories. It is easy to fit the insulating shells
around the pump.
Pump type
Product number
ALPHA SOLAR
99270706
Related information
5.4 Insulation of the pump housing
18
English (GB)
