Viking’s line of InstaSeal® CPVC Sprinkler Head Adapters allow for fast and easy installation without the use of thread tape or sealant. The adapters feature brass threads with an EPDM seat for efficient installation, are available in 1” and ¾” slip x thread and spigot x thread models and can be used with sprinklers having a K-factor of 5.8 or less. This product is a part of Viking’s industry-leading line of CPVC sprinkler pipe and fittings, manufactured with BlazeMaster® CPVC compound, the proven leader in CPVC technology.