API spin clean irrigation system Y filters. 150 psi 4" housing 2" mpt thread in and out. Has 3/4" male thread for drain valve 110 gpm max. Automatic stainless mesh screen flush filter, #50 mesh 300 micron filters. 4 filters total, one unit is missing the spin disc but readily available for $11-18 each. Filter mesh is in good condition on all 4 units, clean and without any tears, gaps or other issues. Some units have 2" pvc threaded unions on them that are in good shape. Some filter discoloration from age but good condition and solid filters that still seal tight. Some may need Replacement o-rings @$6. Filter units are $200 each. New replacement stainless screen filters for this type are alone $140.