Within the Red Hat certification program, the RHCA is considered the most complete (and grueling) certification among the seven major Red Hat certifications. In fact, some equate the prestige of the RHCA to that of the Microsoft Certified Master and possibly the CCIE.
A plumbing fixture like a sink can not function properly without a sink vent. When a drain pipe drains it creates a negative pressure in the sink drain; the negative pressure will pull the water out of the p-trap of the sink that's draining and sewer gases can enter your home if a sink vent is not installed.
Check your local B.D. If your sink doesnât have an unused hole for mounting the air gap, youâll need to bore one in the countertop next to the sink using an electric drill and a hole saw or have the sink top drilled. I think there is a drain piece with that adpt. built-in, a real plumber should be along shortly. Be safe, GBAR.