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BERNT LORENTZ GmbH & Co. KG Kroegerskoppel 7, 24558 Henstedt-Ulzburg, Germany, Tel. +49 (0) 4193 7548 - 0, Fax - 29, www.lorentz.de
Errors excepted and possible alterations without prior notice.
5.3 Drop Pipe
PS pump systems can be installed using the
same pipe components that are used for conven-
tional submersible pumps. Use pipe with a sufficient
pressure rating, with coupling components that are
designed to handle the weight of the entire assembly.
Torque arrestor It is NOT REQUIRED. (softstart motor
system.)
Size of pipe A long line of undersized pipe will reduce
the performance of the system. Proper selection of pipe
size is based on the maximum flow rate and the total
length of pipe from the pump to the pipe outlet or
tank. Refer to the pump specifications at the end of this
manual to determine the peak flow rate for the system
you are installing. For sizing of a long pipe line, refer to
section 12.3
CAUTION Do not assemble iron,
steel, or galvanized pipe
components in metallic contact
with brass or copper. This will
cause rapid electro-chemical
corrosion.
CAUTION If polyethylene (black
flexible) pipe is to be used, see
section 6.3
CAUTION Screwing a metal pipe
component into a plastic reducer
bushing may cause the bushing to
crack, sooner or later. If you use a
plastic reducer bushing, reinforce it with a hose
clamp (all-stainless steel) as shown in the photo.
Tighten the clamp first, then handtighten
WARNING Do not use a rope winch
to install or remove a pump in a
drilled well casing. Do not use a
vehicle to install or remove a
pump. See section 6.3
Figure 20: Hose clamp to reinforce
a plastic reducer bushing
Water Pipe Sizing Chart It is often wise to make
buried pipelines extra-large, in case a larger pump is
desired in the future. Reduced drop pipe size should be
considered in the following situations:
1. sandy water conditions – especially with a
solar-direct system. The flow will be very slow
on cloudy days. This may cause sediment to
accumulate in the drop pipe. Smaller pipe will
increase the flow velocity and helps exhaust the
sediment. See section 5.7, Coping with Dirty
Water Conditions
2. hand installation – to reduce the weight,
especially for removal when the pipe is filled with
water.
Balance these advantages against the increased friction
loss in smaller pipe. You can use a pipe size that is
smaller than the pump outlet by using a reducer bush-
ing. Horizontal pipes can be larger.
PS Pump Systems have a stainless steel outlet fitting. It
is compatible with iron, steel, galvanized, bronze, brass,
or any plastic pipe components.
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