Various embodiments of {HEAD ~ a cartridge} for regulating {TAIL ~ a fluid flow} are described that include an upper housing, and an insert that is user removable from the upper housing 
Various embodiments of { HEAD ~ a cartridge } for regulating { TAIL ~ a fluid flow } are described that include an upper housing , and an insert that is user removable from the upper housing
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH