|
|
 |
|
|
|
1/2 Inch Dual Check Valve With Intermediate Atmospheric Vent
|
|
|
|
The Watts 9DM3 Dual Check Valve with Intermediate Atmospheric Vent is recommended for boiler feed lines to prevent backflow of hydronic system water into your homes drinking water when supply pressure falls below system pressure. It is suitable for use on hot or cold water and can be used under continuous pressure. This check valve features a primary check valve utilizing a rubber disc seating against a mating rubber part to ensure tight closing. A secondary check valve utilizes a rubber disc-to-metal seating. In the event of fouling of the primary check valve, leakage is vented through the vent port thereby safeguarding the potable water system. The 9DM3 may be installed horizontally or vertically.
Note: This valve should only be used and properly installed so that spillage of water cannot cause damage. To avoid water damage due to valve operation, a drain pipe must be installed. It should terminate approximately 12” above a floor drain or through an air gap piped to a floor drain, or other suitable place of disposal. Under no circumstances, should the vent opening or drain line be plugged.
Features - Forged brass body construction
- Stainless steel internal parts
- Durable, tight seating rubber check valve assemblies
- True line-sized construction allows the check modules to open further allowing dirt and debris to pass more freely, reducing check fouling
- Quick closing valves, (water hammer or supply pressure fluctuations can cause intermittent discharge)
- Furnished with 1/2 inch female union connections to facilitate removal and replacement for maintenance (drain is 1/2 inch threaded connection)
- Compact simple design for easy maintenance combined with high performance
- ASSE 1012 and CSA B64 approved
|
|
The Watts 9DM3 Dual Check Valve with Intermediate Atmospheric Vent is recommended for boiler feed lines to prevent backflow of hydronic system water into your homes drinking water when supply pressure falls below system pressure. It is suitable for use on hot or cold water and can be used under continuous pressure. This check valve features a primary check valve utilizing a rubber disc seating against a mating rubber part to ensure tight closing. A secondary check valve utilizes a rubber disc-to-metal seating. In the event of fouling of the primary check valve, leakage is vented through the vent port thereby safeguarding the potable water system. The 9DM3 may be installed horizontally or vertically.
Note: This valve should only be used and properly installed so that spillage of water cannot cause damage. To avoid water damage due to valve operation, a drain pipe must be installed. It should terminate approximately 12” above a floor drain or through an air gap piped to a floor drain, or other suitable place of disposal. Under no circumstances, should the vent opening or drain line be plugged.
Features - Forged brass body construction
- Stainless steel internal parts
- Durable, tight seating rubber check valve assemblies
- True line-sized construction allows the check modules to open further allowing dirt and debris to pass more freely, reducing check fouling
- Quick closing valves, (water hammer or supply pressure fluctuations can cause intermittent discharge)
- Furnished with 1/2 inch female union connections to facilitate removal and replacement for maintenance (drain is 1/2 inch threaded connection)
- Compact simple design for easy maintenance combined with high performance
- ASSE 1012 and CSA B64 approved
|
|
|
|
