Integration Constraints; Valve Connection To Piping; Top-Mounted Valve Installation - Pentair FLECK 9100 SXT Installer Manual

Installer Manual Fleck 9100 - SXT - Installation
• It is not recommended to use sealants on the threads. Use PTFE (plumber's tape) on the threads
of the drain elbow, and other NPT/BSP threads.
• The installation of a prefilter is always recommended (100μ nominal).
• Valve inlet/outlet must be connected to main piping via flexible.
5.4.

Integration constraints

Location of a water treatment system is important. The following conditions are required:
• Flat and firm level platform or floor;
• Room to access equipment for maintenance and adding brine (salt) to tank;
• Constant electrical supply to operate the controller;
• Total minimum pipe run to water heater of 3 m to prevent backup of hot water into system;
• Always install check valve to protect the softener from hot water return;
• Local drain for discharge as close as possible;
• Water line connections with shut off or bypass valves;
• Must meet any local and state codes for site of installation;
• Valve is designed for minor plumbing misalignments. Do not support weight of system on the
plumbing;
• Be sure all soldered pipes are fully cooled before attaching plastic valve to the plumbing.
5.5.

Valve connection to piping

The connections should be using PTFE (plumber's tape) on the threads if using the threaded
connection type.
In case of heat welding (metal type connection), the connections should not be made to the valve when
soldering.
Note
See chapter 3.3. Description and components location, page 17 to identify the connections.

5.5.1. Top-mounted valve installation

When pressurized, any composite tank will expand both vertically and circumferential. In order to
compensate the vertical expansion, the piping connections to the valve must be flexible enough to
avoid overstress on the valve and tank.
In addition, the valve and tank should not be supporting any part of the piping weight. This is hence
compulsory to have the piping fixed to a rigid structure (e.g. frame, skid, wall...) so that the weight of
it is not applying any stress on the valve and tank.
34 / 94 Ref. MKT-IM-004 / A - 27.10.2016