Extreme Weather Solutions
Can I use an emergency fixture in an environment that is likely to freeze?
Yes, Bradley offers three different types of products that accommodate freezing conditions.
One of the most popular solutions is the Heat Trace Drench Shower (S19-300), this product is built to order, and features a thermostat and electrical cable that wraps around the pipes, which are then covered with insulation. It also features a freeze protection valve that bleeds off the cold water prevents freezing if power is lost. The Heat Trace is often installed in locations that may reach -50°F or those that require a Class I Division I or Class I Division II rating.
Another alternative would be a frost-proof safety fixture, which features a buried ball valve, or a valve that is located inside the building, sheltered from freezing conditions. Other versions of these fixtures feature a supply connection pipe that extends into the ground below the frost line. Excess water is drained off this pipe and is expelled to prevent pipes on the surface from freezing and/or bursting when ambient temperature is below freezing. To order this fixture, a customer should know the freeze depth in their region. (S19-120HFP, S19-210HFP, S19-220HFP, S19-310HFP, S19-310TW, S19-310NN)
Frost-proof valves are a third solution that are recommended for locations that may on occasion have temperatures below freezing, but primarily remain above 32°F/ 0°C. Freeze valves are activated at 45°F / 7°C and function by opening to expel water in the pipes onto the ground, or through a hose or diversion instrument attached to remove water from the pipes so it doesn't have a chance to freeze. This method is not recommended in areas where freezing temperatures are frequent and last for any extended period of time.(S45-1986, S45-1987)
What is the difference between a Class I Division I and a Class I Division II fixture?
Fixtures that carry a Class I Division I rating are typically selected for environments that have hazardous and explosive material present on a continuous basis. Class I Division II fixtures are normally installed in locations that have explosive materials that frequently enter and leave the vicinity. Consult the local authority having jurisdiction for proper compliance to codes in your area.
What do the Explosion Groups B, C, D signify?
The groups signify that the fixture is rated for use when the explosive gases in these groups are present. See NFPA(National Fire Protection Association)/NFC (National Fire Code) for further information. Consult the local authority having jurisdiction for proper compliance to codes in your area.
Does the heat trace wire keep the water tepid? 60-100°F (15-37°C)
No the heat trace wire, insulation and freeze protection valve prevent the water from freezing and bursting the pipes.
How do freeze and scald protection valves activate?
Freeze and scald protection valves have a thermostatic plunger valve assembly. This thermostatic valve open and closes relative to the water temperature. This exchange of fresh water either warms of cools the water in the fixture and the fixture based on the type of valve used and the temperature of the water being supplied.
Do I need a scald valve?
Scald protection valves are recommended for warm climates where ambient temperature regularly reaches 85°F /30°C and above for any length of time. The scald valve is activated when the water in the pipes reaches temperatures of 85°F /30°C and above. The valve opens and expels the hot water from the unit.