... .O.M.,which is under the 4inch valve. This precise filter is just designed for valve command water, the water flowing ... both in drain port, solenoid and regulator, etc. This filter is 100 mesh and can automatic cleaning itself during the filtering. The ... .4Length54Inner Thread1/8" NPTOuter Thread1/4" NPTPackage Quantity100/200/500/1000 valve finger filter