M73AS
Installation
Instructions
In addition to protection from freezing,
the anti-siphon prevents outside
water from being siphoned back into
the water supply system.
Tools Needed
• Drill
(if making new hole
through siding)
• Adjustable wrench
(if making threaded connection)
• PTFE Tape
(if making threaded connection)
• Torch/Solder/Flux
(if making
solder connection)
• Screws
(for attaching to siding)
4321 Piedmont Parkway
Greensboro, NC 27410
E: sales@americanvalve.com
P: 1-800-645-0101
F: 1-800-876-0109
Freeze-Proof Sillcock
With Integral Vacuum Breaker
How to Install
1. Bore a 1 1/4" hole through the foundation wall or the floor joint band and insert the sillcock
from the outside.
2. Position sillcock so the outside spout is pointed down. To check spout position from inside the
building, note that when the word "TOP" on the inlet connector faces up, the outside spout is
down. (See fig.1)
3. Install the sillcock at a slightly downward angle (approx. 5°) to the outside wall, so that it will
drain properly. Place the plastic angle wedge (provided) between the outside wall and the
sillcock flange to assist in creating the downward angle. Draining is necessary for freeze-proof
performance.
4. If making a soldered connection, open valve fully before applying heat. Direct flame away from
valve.
5. If making a PEX connection, attach the PEX adapter to the Male NPT/Solder threads of the
sillcock (hand-tighten only). Attach PEX tube by following the crimp ring and crimp tool
manufacturer's recommendations.
6. Secure sillcock flange with two #8 or #10 oval head wood screws (of proper length) or with
appropriate masonry hardware.
Figure 1:
INLET
SIZES
HANDLE OPEN
WHILE SOLDERING
CONNECTION
THIS END
SLIGHTLY LOWER (approx. 5°)
Important – To Ensure Drainage
Turn sillcock handle to closed position and detach hose from spout during freezing weather.
If hose is left attached, the freeze-proof sillcock cannot drain properly, and trapped water may
freeze and damage the sillcock.
The freeze-proof sillcock ensures no-freeze operation because the valve mechanism shuts off
water inside the building, where it is heated. If building will be unheated for any length of time,
then all water lines should be drained and plumbing fixtures winterized.
Do not over-tighten. Wrap pipe thread tape in the same direction as the threads.
A M E R I C A N V A L V E . C O M
1/2in. Male NPT/Solder
1/2in. 1/2in.
1/2in. Solder
WALL THICKNESS
8in. (example)
1-1/4in.
DIA
FOR CONNECTION
2in.
"TOP" MARKED ON
CONNECTOR TIP
AV_M73AS Installation_V1_02.19