Oventrop Oilpur, Siku heating oil filter two strand  both sides 3/8 ", shut-off valve

These oil filters are made for single-line or dual-line systems as well as for single- line systems with return flow feed. Filters for dual-line systems have an additional back flow preventer.  For those oil filters with return flow feed there is a built-in vent valve for commisioning. These oil filters can be universally mounted  at 1/4" up to 1/2" due to the loose mounting flange. Thus, the complete pipe system gets a firm fit. These oil filters consist of: - a fast closing shut-off valve, - non-return valve, - brass housing, - mounting bracket, - transparent cup for suction operation, - for hose clip connections for 6, 8, 10 or 12 mm, (connection sets must be ordered separately )