PEX Installation Manual

29
IM-PF 724596 0416
The main service line to the ManaBloc may include
a main shutoff valve, as required by local code.
Although a shutoff valve for the main service line at the
ManaBloc itself is not required, it can be a benecial
option for a homeowner and is recommended.
Local code may also require the installation of a check
valve, Pressure Reducing Valve (PRV), back ow
preventer, etc. To prevent debris and other particles
from entering the system, a strainer may be installed
in the service line.
Optional
ManaBloc
shutoff
If a main inlet/outlet will not be used, it must be
capped. (Use part number 53601.)
12.3 Draining the ManaBloc unit
If the ManaBloc system has been lled with water and
there exists the possibility that the ambient temperature
will drop close to or below 32°F (0°C), the ManaBloc
unit MUST be drained to prevent irreparable damage.
The process of draining involves loosening and removal
of one or more supply line connections and two
distribution lines from the ManaBloc.
NOTE: Depending on the installation, some supply
connections may be capped. If that is the case, remove
the cap(s) as instructed below.
1. Turn off all water supply(s) feeding the
ManaBloc. Open both sides of all fixtures
served by the manifold and leave the fixtures
open during draining. For each port of the
ManaBloc where there is a distribution line
connected, make sure the port valve is in the
open position.
2. Loosen and remove the bottom supply
connection(s) (or cap(s)) and the lowest pair of hot
and cold distribution lines.
3. As the connections are removed, most of the
water contained in the ManaBloc main bores and
some of the water in the distribution lines should
purge from the system.
4. Allow to drain until no water purges.
5. Reattach the supply line(s) or cap(s) and the
distribution lines. Tighten the supply connections
according to the instructions in Section 14.5.
When reconnecting the distribution lines, DO
NOT overtighten the connections. These only
need to be hand-tight.
NOTE: The procedure described above will leave
a small amount of water in the ManaBloc unit and,
depending on the installation, may leave some or most
of the water in the distribution lines. This remaining
water should not cause damage to the manifold unit
or to the PEX distribution lines in the event of a freeze.
However, for complete assurance that freeze damage
will not occur, perform the following additional steps.