Arko Tractor Parts for Stanadyne Roosa Master Return Check Ball 21251

Arko Tractor Parts New Stanadyne Roosa Master Return Check Ball OEM Part Number: 21251 The female end is 1/8″ pipe thread The male end is 7/16 X 20″ Standard thread with o-ring In most cases, this valve DOES fit all pumps with model numbers that start with DB2, DB4 In most cases, this valve DOES NOT fit pumps with model numbers that start with JDB, DBG, DBM, DBO, DCB, DCM, CDC, CBC, DES Note: If this check valve is getting clogged with black partials or has been broken out it usually means the pump needs to be rebuilt.