Xylem Lowara Scuba Dry Series Additional Installation, Operation And Maintenance Instructions page 17

3. Support the pipes independently to prevent them from weighing on the unit.
4. Install appropriate seals between the unit and the piping system connections.
5. Check the piping system for perfect tightness.
Suction pipe
1. Suction pipes exceeding 10 m in length (33 ft) must have a larger diameter than the suction
2. Flexible piping systems must have a reinforced spiral to prevent contraction in case of
3. In case of suction lift installation:
4. In case of positive suction head installation, install:
Discharge pipe
1. Install a check valve on the piping system, at least 2 m (7 ft) from the unit, followed by one
2. Install a pressure gauge for checking the actual operating pressure of the unit.
3. Install an on-off valve, downstream from the check valve and pressure gauge, to regulate
4. Install a diaphragm tank to limit the number of starts, stabilise the operating pressure and
SCUBA DRY – Additional Installation, Operation and Maintenance Instructions
port.
depression.
• The piping system must have an increasing slope towards the unit exceeding 2%; to
avoid air pockets
• Install a foot check valve with suction strainer, making sure that it is always submerged.
• An on-off valve
• An Inspectionable filter.
every 10 m (33 ft) of geodetic level difference.
the flow rate.
reduce the pressure peak caused by water hammer effects.
en – Original Instructions
17