Title: AV-1 alarm valve.pdf
Step 4. Suitable provision must be made for disposal of alarm line and system drainage water. Drainage water must be directed so that it will not cause damage or result in danger- ous conditions.Step 5. The alarm line drain must be arranged so that there will be no dan- ger of freezing.Step 6. The check valve in the exter- nally mounted bypass around the Waterway Clapper must be installed with its arrow pointed up, and the drain check valve must be installed with its arrow pointing towards the drain.Step 7. It is recommended that a vent connection (which may also be used as an end-of-line Inspector’s Test Connection), be piped from a cross main or branch line at the point most remote from the alarm valve. The vent line should be connected to the top of a cross main or to the end of a branch line and be located at the highest level of a multi-level installation.