Installation Tips For Manabloc Systems
Read the Manabloc installation instructions thoroughly before you begin.
All connections to the Manabloc require special fittings; only use
approved Vanguard Manabloc fittings for inlet/outlet and Hot/Cold supply
Manabloc connections! The
Vanguard warranty is void if the system is improperly installed and does not
cover stripped threads due to improper fittings.
NEVER USE THREAD SEALER ON THE MANABLOC OR PEX TUBING.
MXBD Manablocs have (3) Inlet/Outlet ports that can be configured two
Cold Supply Inlet connected to
main; Hot Supply Inlet connected from water heater; Cold Outlet capped.
Water heater cold supply is branched from main before the Manabloc.
Cold Supply Inlet connected to main; Hot Supply Inlet connected
from water heater; Cold Outlet connected to water heater cold supply.
Water heater cold supply is fed from Manabloc cold outlet port.
3/8" Pex tubing is recommended for all low-flow fixture supply lines (lav's, kitchen sinks, dishwashers, icemakers, washers and toilets). Use MXRSA24 or MXLDC24 3/8" to 1/2" Manabloc port adapters to connect 3/8" Pex tubing to the standard 1/2" Manabloc ports.
1/2" Pex tubing is recommended for all high-flow fixture supply lines (tubs, showers and hose bibs).
Tub/Shower showerheads and spouts should be plumbed with 1/2" lines from the
valve assembly to insure the diverter will work correctly.
Use 3-ear drop-eared elbows (XLDE33) for the spout and showerhead (the
standard 2-ear drop-eared elbows do not provide enough support for the Pex
When connecting the Pex tubing to the Manabloc do not over tighten.
Snug the compression nut with the Manabloc wrench until you feel and
hear slight "torque-slip".
Observe the Manabloc when you charge the system (turn the water on, hot and
cold) and re-tighten any compression nuts, if necessary.
Use Lavatory fittings (XRSAxx or XLSAxx) for accessible fittings without thread
Use pipe thread adapters (XLFCxx or XLMCxx) for inaccessible fittings
with thread sealer on the pipe threads only!
NEVER USE THREAD SEALER ON CRIMP CONNECTIONS.
Make sure to clean any thread sealer off the crimp side of the
fitting and the tubing before crimping.
Check your crimps with a HAC34 crimp caliper.
We are not aware of any leaks from any specification crimps for any system
we have sold or installed, ever!
Make sure the crimper is perpendicular to the tubing before you crimp (if
you make an angled crimp, you have to cut the fitting off and try again with
a new fitting.)
Pressure test the system before installing drywall. Use test plugs and test caps during construction…they keep dirt and debris out of the tubing. Also, make sure to install protector plates when there is any chance that nails or screws could hit the tubing.
In accessible locations, secure Pex tubing every 30", or less, with non-metallic tubing clamps (24", or less, in concealed locations).