Watts Divertaflo M9400 Series - Manual (Page 2)

Installation Instructions
CAUTION:
When solder connections are being made, keep all heat
away from all rubber, fiberglass or plastic parts. Carefully
study all instructions on this sheet prior to starting the
bypass valve installation. Follow the sequence here as you
proceed with the installation.
a) Remove the bypass valve push rod prior to making
sweat connections to the bypass valve. Install pushrod
and tighten screw on cap after the valve installation is
complete and the valve is cool to the touch.
b) Always use the small wooden spacer blocks provided
to avoid exposing the control valve to any excess heat
during any sweating (soldering) operations.
C) Wooden spacer blocks, instructions and all necessary
mounting hardware and packed in a single clear plastic
bag and furnished with each valve. (Ref. our P/N 60034)
• When installed properly O-rings should be as pictured here.
• Install four brass mounting screws and nuts and tighten about as
shown in the figure.
• Insert wooden spacer blocks by sliding between screws.
• If you prefer, spacer blocks may be turned to a vertical position
placed just on the outside of the four mounting screws.
• Apply O-rings (3 req'd) to tank adapter.
• Always lubricate O-rings prior to installing bypass valve. Silicone
spray, O-lube or vaseline may be used.
• Fully insert each O-ring so it is resting against molded ledge of the
control valve as pictured in Figure 2.
• Once the wooden blocks are fully inserted then snug mounting
screws, being careful to maintain approximate equal torque to each.
Do not overtighten mounting screws at any time.
• After blocks are in place, then valve may be heated for sweating
copper pipes. After valve cools, push rod can be re-inserted as
shown.
• This figure shows 1" (25mm) copper piping installed.
• After valve cools to the touch, the wooden blocks may be removed.
For easy removal it may be helpful to loosen screws slightly.
• Tighten each screw snugly but don't overtighten.
• The push rod may be installed from either side of valve body. Either
way the valve will function properly.
• A complete installation would look like Figure 4 above or like Figure 5.
• This particular figure shows a complete installation using 1" copper
"in" and "out" piping. Models available also for 3 ⁄ 4 " (20mm) supply
piping
• The drain connection on each valve is 1 ⁄ 2 " (15mm) F.I.P. thread for
easy installation.
• The figure above shows 1 ⁄ 2 " (15mm) iron pipe for the drainline. (Use
Teflon tape on all threaded connections.)
General Notes
• If making sweat connection, always keep heat away from plastic items. Apply heat only in the immediate area of the brass as needed for soldering
and try to minimize the time the valve is heated consistent with achieving a good solder joint.
• If no heating of the bypass valve is necessary, then there is no need to remove valve pushrod. Also the wooden blocks are not needed and
may be discarded. For example certain valve models are intended expressly for threaded piping connections.
• When making the installation, be certain to leave slack in the inlet and outlet plumbing line connections to the by-pass valve. The softeners
must not be supported by the plumbing connectors. Also, any stress created by piping connections may damage the fiberglass control valve.
• For bypass valve maintenance or service instructions, see "regular Divertaflo valve" service and installation instruction sheet.
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IS-M9400 0904 EDP#1910858 © Watts, 2008
USA: 815 Chestnut St., No. Andover, MA 01845-6098; www.watts.com
Canada: 5435 North Service Rd., Burlington, ONT. L7L 5H7; www.wattscanada.ca
W a t e r S a f e t y & F l o w C o n t r o l P r o d u c t s
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