SAF1 series Spin-on filter for return line applications features an all steel housing and machined steel head. It is offered with the porting option SAE 34 in. straight thread; other threading options are available upon request. An integrated bypass valve with optional Dirt Alarm indicators enables operators to identify the appropriate time to change the element. It comes with standard P size spin-on element in 10 and 25 μm Excellement Z-Media or in 10 μm cellulose media.