This is from a flipped home they were hiding the corroded and about-to-collapse pier

https://youtu.be/u58tkf2MVmI

Check out this video: https://youtu.be/45twRGZ_0Go

https://youtu.be/dse-WcdjA2s

Piping should be supported to ensure alignment and to prevent sagging. Piping in the ground should be laid on a proper bed. Piping above ground should be supported with hooks, straps, bands, brackets and/or hangers suitable for the size of the piping, of adequate strength and quality, and located at intervals so as to prevent sagging, damage and vibration. Other piping should not support piping. Piping should not put strain upon connected equipment or appliances.

Individual, branch and circuit vents are permitted to terminate with a connection to an individual or branch-type air-admittance valve. Stack vents and vent stacks should be permitted to terminate to stack-type air-admittance valves. Access should be provided to all air-admittance valves. The air-admittance valve should be rated according to the size of the vent to which it is connected. www.nachi.org

A common vent is one vent that serves more than one fixture, functioning as an individual vent for each fixture. Wet venting is venting single or double bathroom groups or combinations thereof, where one vent pipe may serve all the fixtures connected to the wet vent. Waste-stack venting is venting individual fixtures through a drainage stack, and the over-sized stack functions as the vent. Circuit venting is venting up to eight fixtures with a single vent pipe. A combination drain-and-vent system is restricted to floor drains, sinks and lavatories, and relies on the over-sized drain pipe. Island-fixture venting has a vent installed below the flood-level rim of the fixture before rising to connect to another vent.

Where the drainage system cannot drain by gravity to the sewer, an automatic pump or ejector can be used to discharge the soil and waste. The cover for the pump should be tightly sealed (gas-tight). Sumps, other than pneumatic ejectors, should be vented with a minimum 1-1/4-inch diameter vent pipe. Pumps use mechanical methods to discharge, and pneumatic ejectors use air pressure. Grinder pumps and ejectors pulverize solids to a near-liquid state and pump the slurry to the drainage system.

All cleanouts should be accessible or reachable without having to remove a permanent portion of the structure. Cleanouts are designed to make the interior of a drainage system accessible for clearing stoppages without inconvenience, dismantling wall or ceiling finishes, or disturbing the sanitary drainage system.Cleanout plugs are very common. They are usually located at changes in direction in a drain line and at the bottom of stacks. Cleanouts should be installed to open and allow cleaning in the direction of the flow of the drainage pipe, or at right angles thereto. They must be water-tight and gas-tight. A cleanout plug can be made of brass or plastic. A cleanout plug should have a raised square or a counter-sunk square head where a trip hazard may exist. The square shape minimizes the possibility of stripping the plug during removal.

ExperiencedAll CMIs® have completed at least 1,000 fee-paid inspections and/or hours of training and education combined.EstablishedAll CMIs® have been in the inspection business for at least three years prior to becoming Board-Certified.ProfessionalAll CMIs® abide by the inspection industry's toughest Code of Ethics.EducatedAll CMIs® have completed professional education prior to being approved.VettedAll CMIs® have agreed to submit to periodic criminal background checks.The BestNot everyone can become a Certified Master Inspector®. Hiring a CMI® means hiring the best.

Modern plumbing, including proper sanitary drainage, is one of the reasons that diseases such as typhoid fever, cholera and dysentery have been eliminated. Modern plumbing has improved human health and longevity.