USE ONLY HAYWARD GENUINE REPLACEMENT PARTS
Page 9 of 36
MaxFlo VS Pump
IS2303VSP2 Rev-B
4.2.
Pump Mounting
Install pump on a level concrete slab or other rigid base to meet all local and national codes. Secure pump to base
with screws or bolts to further reduce vibration and stress on pipe or hose joints. The base must be level, rigid, and
vibration free.
Pump mount must:
Allow pump inlet height to be as close to water level as possible.
Allow use of short, direct suction pipe (to reduce friction losses).
Allow for valves in suction and discharge piping.
Be protected from excess moisture and flooding.
Allow adequate access for servicing pump and piping.
4.3.
Pipe Sizing Chart
MAXIMUM RECOMMENDED SYSTEM FLOW RATE BY PIPE SIZE
Pipe Size
in. [mm]
Maximum Flow Rate
GPM [LPM]
Minimum Straight Pipe
Length “L” in. [mm] *
1 ½” [50]
45 [170]
7 ½” [190]
2” [63]
80 [300]
10” [254]
2 ½” [75]
110 [415]
12 ½” [317]
3” [90]
160 [600]
15” [381]
Note:
It is recommended that a minimum length of straight piping (shown as “L” in above diagram), equivalent to 5
pipe size diameters, be used between the pump suction inlet and any plumbing fittings (elbows, valves, etc.).
When installing the MaxFlo VS, care should be taken to ensure proper pipe and equipment sizing to handle the
maximum flow required. It is recommended to set the maximum speed in order to not exceed the maximum flow
rate. See section 6.6 item #7.
WARNING
– Hazardous Pressure.
Pumps, filters, and other equipment/ components of a swimming pool
filtration system operate under pressure. Incorrectly installed and/or improperly tested filtration equipment and/or
components may fail resulting in severe personal injury or death.
4.4.
Plumbing
1.
Use PTFE tape to seal threaded connections on molded plastic components. All plastic fittings must be new or
thoroughly cleaned before use. NOTE - Do NOT use Plumber’s Pipe Dope as it may cause cracking of the plastic
components. When applying PTFE tape to plastic threads, wrap the entire threaded portion of the male fitting
with one to two layers of tape. Wind the tape clockwise as you face the open end of the fitting, beginning at the
end of the fitting. The pump suction and outlet ports have molded-in thread stops. Do NOT attempt to force
hose connector fitting past this stop. It is only necessary to tighten fittings enough to prevent leakage. Tighten
fitting by hand and then use a tool to engage fitting an additional 1 ½ turns. Use care when using PTFE tape as
friction is reduced considerably; do NOT over-tighten fitting or you may cause damage. If leaks occur, remove
connector, clean off old PTFE tape, re-wrap with one to two additional layers of PTFE tape, and re-install
connector.
2.
Fittings (elbows, tees, valves, etc.) restrict flow. For better efficiency, use the fewest possible fittings. Avoid
fittings that could cause an air trap. Pool and spa fittings MUST conform to the International Association of
Plumbing and Mechanical Officials (IAPMO) standards.
