WR110 water regulators can be used in water lines up to 115 psig and are available in two set pressuree ranges.  The X224 variation permits regulation between 11 and 56 psig wihile the X215 operates between 7 and 100 psig.  Both are available in either 1/8" or 1/4" port sizes.  The X224 model is available in Rc thread only, the X215 is available in Rc or NPT.