4
Pipe connection
Barrel unions are provided for connecting to the piping from the pool. The pumps are designed to accept
40/50mm PVC fittings.
IMPORTANT INFORMATION If the ProMaster and filter are located below pool water
level, it is necessary to fit isolating valves in the pipe between the pump and skimmer
box and in return pipe from the filter to the pool. When plumbing the discharge pipe,
ensure that the pipework does not interfere with the pumps speed dial. Barrel unions
need to be hand tightened. No sealant, glues or silicones are required.
The fittings on the ProMaster are constructed of ABS. Some PVC jointing compounds
are incompatible with ABS. Check compound suitability before use.
The use of any pipe smaller than those specified above is not recommended. Suction piping should be free
from all air leaks and any humps and hollows which cause suction difficulties. To achieve best efficiency, the
ProMaster should be installed such that turbulent water is limited as much as possible. As shown in figure
1.1, do not install a 90° elbow closer that 250mm from the inlet barrel union. Isolation valves used where
equipment is located below pool water level, should also be installed no closer than 250mm from inlet barrel
union. This will assist laminar flow.
250mm
ELBOW
Figure 1.1
Figure 1.2
152mm
MINIMUM
76mm
MINIMUM
Suction line
40/50mm
Return to
Pool
40/50mm
Suction line
40/50mm
Return to
Pool
40/50mm
The discharge piping from the ProMaster outlet should be connected to the inlet connection on the swimming
pool filter (usually at the filter control valve). As shown in figure 1.2, ensure adequate clearance above the
pump to not interfere with the ProMaster speed dial. Use a check valve in the discharge line when using this
pump for any application where there is significant height to the plumbing after the pump.
250mm
ELBOW
Figure 1.1
Figure 1.2
152mm
MINIMUM
76mm
MINIMUM
Suction line
40/50mm
Return to
Pool
40/50mm
Suction line
40/50mm
Return to
Pool
40/50mm
Be sure to install check valves when plumbing with another pump. This helps prevent reverse rotation of the
impeller and motor.
WARNING! Pump suction is hazardous and can trap and drown, or disembowel bathers.
Do not block suction. Do not operate swimming pools, spas, or spa baths if a suction
cover is broken, missing or loose. Two suction covers, or inlets must be provided into
every pump to avoid suction entrapment.
