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10 5 2 HDPE pipe
Option 1: Weld a tee-piece into the HDPE pipe, cf. "Figure
23: HDPE pipe tee-piece" below. The tee-piece must have
a 1" female thread (G1", whitworth pipe thread). The pipe
diameter of the fitting should be the same as the pipe size.
This piece will be welded into the pipeline.
The tee-piece described above is not delivered by LOR-
ENTZ.
Option 2: Install an additional piece of steel or stainless
steel pipe with flanges on both sides of the HDPE inlet
pipeline, cf. "Figure 24: steel steel flange with adaptor in
HDPE pipe" below. Weld the steel/stainless steel adaptor
for the water sensor on the steel/stainless steel pipe
according to chapter "10.5.1 Steel/stainless steel pipe" on
page 21.
The steel / stainless steel pipe is not delivered by LORENTZ.
After completing of option 1 or option 2 continue with
step no. 2. of chapter "10.5.1 Steel/stainless steel pipe" on
page 21.
Figure 23: HDPE pipe tee-piece
1" female thread (Whitworth pipe thread)
for the sensor housing
BERNT LORENTZ GmbH & Co. KG Kroegerskoppel 7, 24558 Henstedt-Ulzburg, Germany, Tel. +49 (0) 4193 7548 - 0, Fax - 29, www.lorentz.de
All specifi cations and information are given with good intent, errors are possible and products may be subject to change without notice. Pictures may
differ from actual products depending on local market requirements and regulations.
10 6 Water meter installation
For information on the water meter installation, please
refer to the manufactures manual. Pay attention to the
installation position, flow direction and the calming section.
Basic rule: The water meter should have 10 nominal
diameters straight pipe ahead of the meter and 5 nominal
straight pipe diameters after to ensure proper flow through
the meter
Figure 24: steel steel flange with adaptor in HDPE pipe
HDPE pipe
pipe diameter
D
adaptor
steel / stainless steel pipe
22
10 7 Low water sensor installation
For most applications it makes a lot of sense to install
a "low water sensor" to monitor the level of the water
source.
It sould be installed above the filter cage/strainer of the
inlet pipe, so that it can stop the pump before the water
level can drop below the critical minimum and effectively
avoid that air is sucked in together with the water.
CAUTION – If the water level of the
water source drops below the inlet
of the suction pipe the pump will
suck in air together with the water
To restart the pump the suction pipe has to be refilled with
water manually! See also chapter 10 "Initial startup"
CAUTION – Air inside the suction
pipe can lead to cavitation and/or
dry running of the pump
For an open water source (like rivers, lakes, ponds, etc.) the
LORENTZ float switch can be used.
Figure 25: Water meter installation
D
10×D
Sun. Water.
5×D
Life.
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