Watts 1170 Series Installation Instructions

Series 1170, LF1170, L1170 and LFL1170
Hot Water Temperature Control Valves
Size: ⁄ ", ⁄ ", 1" (15, 20, 25mm)
1 3
2 4
Installation Instructions
Valve should be installed and adjusted by a licensed contractor in accordance with
local codes and ordinances. Further, this valve should be installed in a location where it
is accessible for cleaning, service or adjustment.
1. Close both the hot and cold water shutoff valves upstream nearest to the intended
installation.
2. Bleed the remaining water from the system.
3. Connect the water supply to valve as shown in Figure 1 or 2, depending on the
application. Supply piping must be flushed clean before making connections to the
valve.
IMPORTANT!: To prolong the life of the Model 1170-M2, L1170-M2, LF1170-M2 or
LFL1170-M2 valve, it is recommended that it be trapped as shown: i.e. the hot water
inlet to the 1170-M2 or LF1170-M2 valve should be 8" – 12" (200 – 305mm) below
the hot water supply feed.
4. Valve can be installed in any position. Note: the inlet hot supply is to be connected
to the "H" side of the valve, the cold supply side to the "C" side and the mixed water
outlet to the "M" side.
5. Make sure union nuts are placed over tailpieces prior to
soldering or threading to pipe.
6. For valves with Quick-Connect tailpieces refer to "Quick-
Connect Installation" instructions below.
Note: To prevent damage to valve from excessive heat during
soldering, remove unions and gaskets from valve body prior to
soldering.
7. After soldering, flush piping and install valve using filter washer
on hot and cold water inlet and fiber washer on the mixed
water outlet.
8. Start-up: Open cold water supply, then hot water supply.
Inspect for leaks.
9. Adjust temperature to desired setting (see Temperature
Adjustment Section).
Figure 1
Domestic Hot Water Application
Watts
Vacuum Relief
Valve
Watts T&P
Relief Valve
Domestic Hot Water Application
*Note: To prolong the life of the valve, it is recommended the
valve be trapped as shown
† Devices tested to ASSE 1070 or ASSE 1069 such as Watts
USG, LFUSG, L111, MMV or LFMMV should be used at
fixture to prevent possible injury.
*8" – 12"
1170-M2, L1170-M2
LF1170-M2 or LFL1170-M2
Cold
Quick-Connect Installation
To Connect
1 1 / in. (38.1mm)
2
/ in.Pipe (12.7mm)
1
2
1 3 / in. (44.45mm)
4
/ in.Pipe (19.05mm)
3
4
1 / in. (47.63mm)
7
8
1 in.Pipe (25.4mm)
1. Mark pipe as shown.
This is pipe insertion depth.
PEX tubing only
Pipe Stiffener
Tail Piece
3. If using PEX tubing, insert pipe
stiffener (provided) into end of pipe.
To Disconnect
1. Remove collet clip.
IS-1170-M2_L1170-M2
LF1170-UT-M2
1170-QC-M2
2. Clean pipe end.
Collet clip
Mark
4. Push tubing into tailpiece up to mark.
5. Insert collet clip.
Collet depressed
2. Depress collet.
3. Pull tubing from tailpiece.