I have this air bar one inch pressure pipe with taps and as a half inch input not shown on pic but it’s a grey pressure threaded 1/2 inch hosetail brilliant for extra air or a bio chamber just add air line and large airstones free to collector

4000 gallons queni koi drum and jbr plastics bio chamber drum fed from bottom drain 3 inch gravity skimmer also into drum 55 watt submersible uv 240 litres air and 12 fishI