PREFERRED UTILITIES A-274 1/2" ANTI-SIPHON OIL VALVE The Model A Anti-Syphon Valve reduces fire hazards and prevents oil spills caused by oil being siphoned from the storage tank onto the boiler room floor. The valve automatically shuts off the oil flow in the event of a broken or inadvertently left open oil suction line.
Anti-Syphon valves are required by various fire protection codes to be installed in fuel oil systems to prevent syphoning oil out of a tank due to a low line break or leak in the pipe. The Anti-Syphon Valve is installed in a vertical position at the highest point in the suction line with no part of the line between the valve and the tank below the maximum oil storage level. Although suitable for outdoor installation, consideration should be given to the possibility that moisture en trained in the oil might freeze in the valve and immobilize the poppet. Complete instructions are furnished with each valve.
Model Numbers
Head Size
Size
Grade Oil
Capacity GPH
5'
10'
15'
20'
A-270
A-271
A-272
A-273
3/8"
2
30
A-274
A-275
A-276
A-277
1/2"
2
30
A-278
A-279
A-280
A-281
3/4"
2, 4
100
A-305
A-306
A-307
A-308
1"
2, 4, 6
300
A-302
A-283
A-284
A-285
1 1/4"
2, 4, 6
300
A-303
A-287
A-288
A-289
1 1/2"
2, 4, 6
300
A-304
A-291
A-292
A-293
2"
2, 4, 6
300
A-294
A-295
A-296
A-297
2 1/2"
2, 4, 6
1000
A-298
A-299
A-300
A-301
3"
2, 4, 6
1000
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