Viking is a proud world leader in the design and manufacturing of life-saving fire sprinklers. The Blow-Off Plug for Model E Spray Nozzle is just one of the industry-leading sprinkler accessories available to customers! Blow-off plugs are used to prevent the depositing of foreign materials in the waterway of open Viking Model E Spray Nozzles, which could interfere with the discharge of the spray nozzles. Use of the blow-off plugs is optional.Sift through virtually every sprinkler in a flash with the revolutionary Sprinkler Selector! Select various criteria, such as K-factor, occupancy type, orientation, temperature and more, to get the part number you need. Test it out today and streamline your projects!