4
Pump mount must:
Be solid - level - rigid - vibration free. (To reduce vibration
and pipe stress, bolt pump to mount.)
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 gate valves in suction and discharge piping.
Be protected from excess moisture and flooding.
Allow adequate access for servicing pump and piping.
NOTICE:
Use Teflon tape or Plasto-Joint Stik
1
for making
all threaded connections to pump. Do not use pipe dope;
pipe dope will cause stress cracking in pump.
NOTICE:
Pump suction and discharge connections have
molded-in thread stops. DO NOT try to screw pipe in be-
yond these stops. Tighten pump/trap fittings only as re-
quired to ensure tight connection (1-1/2 turns past hand
tight). Do not overtighten. Use care when using teflon
tape as friction is reduced considerably; do not over-
tighten connections or damage may occur.
Teflon Taping Instructions:
Use only new or clean PVC pipe fittings.
Wrap male pipe threads with one to two layers of teflon
tape, winding tape clockwise as you face start of thread.
Cover entire threaded portion of pipe.
DO NOT OVERTIGHTEN
or tighten past thread stop in
pump port!
If leaks occur, remove pipe, clean off old tape, rewrap
with one to two additional layers of tape and remake con-
nection.
NOTICE:
Support all piping connected with pump!
Piping
For pump discharge use 1-1/2" PVC pipe or reinforced
hose.
For pump suction on all models, use 1-1/2" reinforced
hose.
Increase size if a long run is needed. For pipe larger than
port, use reducing fitting in trap port.
To avoid pump strain, support suction and discharge in-
dependently. Place supports near pump.
To avoid strain left by a gap at last connection, start all pip-
ing at pump and run pipe
away
from pump.
Never use suction pipe smaller than pump suction con-
nections.
No air leaks in suction pipe. Keep pipe straight. Suction
pipe inlet must be lower than pump inlet port.
NOTICE:
To prevent flooding when removing pump from
service, all flooded suction systems must have gate valves
in suction and discharge pipes.
Use expansion joint or flexible piping. (Plastic pipe will
expand and contract as temperature changes.)
Fittings
Fittings restrict flow. For better efficiency use fewest pos-
sible fittings.
Avoid fittings that could cause an air trap.
Pool and spa fittings must conform to International
Association of Plumbing and Mechanical Officials
(IAPMO) standards.
Use a non-entrapping suction fitting in pool or double suc-
tion (skimmer and main drain).
1
Lake Chemical Co., Chicago, Illinois.
INSTALLATION
Bonding Lug
1-1/2" Discharge Piping
Strainer Basket Cover
1-1/2" Suction
Piping
Drain Plugs
983 0993
FIGURE 1
Summary of Contents for CRAFTSMAN 390.262801
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