1 1/2"

Apollo/Conbraco 40-100 Series Double Check Valve Assembly: Domestic Bronze Body; Top Access Checks & Test Cocks; Replaceable Seats & Reversible Silicone Seat Discs. 3/4 - 2" In production from 1989-2012. Two body styles were produced, wye pattern and top entry. Wye patterns were discontinued in 2002. A seat removal tool is required to replace seats. The check seats are not contained and the covers have spring pressure against them. Use caution when servicing.

The 1 1/2" Apollo 4A series double check valves began production in 2008 and was discontinued in 2014. The 4A was replaced by the LF4A which is the lead free version. The body was constructed of bronze and check assemblies are self contained plastic modules. Check covers are threaded into the body. Check seats are replaceable. 4A and LF4A parts are interchangable. No special tools are required for servicing.

The 1 1/2" Apollo 4ALF series double check valves began production in 2013 and is still currently in production. The 4ALF replaced the original 4A series. The "LF" designates lead free and was introduced to meet low lead laws of 2014. The body is constructed of bronze and check assemblies are self contained plastic modules. Check covers are threaded into the body. Check seats are replaceable. 4A and 4ALF parts are interchangable. No special tools are required for servicing.