3/4" NPT, HEAVY DUTY COMPRESSED AIR FILTER REGULATOR COALESCING DESICCANT DRYER | eBay
3/4" Air Compressor Regulator & Filter Combo w/ Gauge Auto Drain FR726 – compressor-source
3/4" NPT HEAVY DUTY Compressed Air In Line Filter Regulator Combo Piggyback, Metal Bowl, 5 Micron Element, Adjustable From 7 to 175 PSI (AUTO DRAIN) - Amazon.com