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www.pumper.com/.../01/older_concrete_septic_tanks_often_dont_show_deterioration

The tank tops starting with the third compartment are badly decayed, while the walls show little or no decay. In 1960, precast tanks became common. One manufacturer quickly became the dominant supplier in our county. The tanks installed from 1960 through the mid- to late 1970s held up pretty well. Tanks installed after that decayed rapidly.

groups.google.com/d/topic/alt.home.repair/oPr6r9OUOOw

continued lifespan of the system, so I can budget for a new system if needed in the near future. Here are some facts. In my plat, probably 1 out of 5 of the septic systems (of similar or newer vintage) has been replaced in the last 5 years. The ground in this area is clayey, not real bad but not sandy

www.dailyrecordnews.com/scrapbook/the-history-of-local-septic-tanks/article_22...

In the 1960s, precast concrete tanks became more prevalent as the standard of practice improved. Most tanks were still single compartment 750, 1,000 or 1,200-gallon tanks, usually depending on the ...

www.epa.gov/septic/types-septic-systems

Types of Septic Systems Septic system design and size can vary widely, from within your neighborhood to across the country, due to a combination of factors. These factors include household size, soil type, site slope, lot size, proximity to sensitive water bodies, weather conditions, or even local regulations.

www.youtube.com/watch?v=iS95IGBFTxs

Septic Tank Pump Out & Repair; cleaning, pumping, clean out, distribution box, drain field - Duration: 13:07. Broadfork 685,048 views

www.oldhouseonline.com/repairs-and-how-to/caring-for-septic-systems

With ordinary use and care, a septic tank usually requires cleaning every three to five years (more if you use a sink-mounted garbage disposal unit). However, in many cases septic tanks can be operated for up to five years if properly maintained. Depending on the size of the tank and your location, plan on spending about $200 for each pumpout.

www.hunker.com/13425265/old-septic-tank-styles

Septic systems provide private sewage treatment for properties that are not connected to city sewer lines. Choosing the right septic tank style for you largely depends on the soil composition on your property. Gravity and pressurized systems typically require 2 to 3 vertical feet of native soil.

photobucket.com/images/old+septic+tank

Browse Old Septic Tank pictures, photos, images, GIFs, and videos on Photobucket

ruralhometech.com/evolution-of-the-septic-system

About the same time, most installers switched from the old style steel septic tanks to the supposedly more permanent concrete style (shown here). Then as the better land became developed and man was forced to settle on poorer ground with higher water tables, leach fields began to get pushed out of the ground to maintain separation to ground water.

www.vdwws.com/2015/01/a-short-history-of-the-septic-system

1881 – Mouras is granted a patent for his septic tank design. 1883 – Septic systems start appearing throughout the US. 1940s – Septic systems become cheaper and more popular during the post-WWII economic boom. 1960s – Old septic systems begin failing. Construction of sewage treatment plants cannot keep up with growth of cities and towns.