WSC - Water Specialties Company

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The 1/2" Wilkins Model 420XL pressure vacuum breaker began production in 2010 and is still currently being produced. The 420XL is a lead free device and replaced the old model 420 which was not lead free. Leaded and lead free versions use the same internal parts. The 420XL was designed as a freeze resistant vacuum breaker. The 420XL still must be winterized as it is "freeze resistant" not "freeze-proof." The check assembly is self contained and has a replacable seat. The air inlet uses a rubber fold instead of the traditional spring inlet.No special tools are required for servicing.