Pumping your tank protects your drain fields. Failure to do this can result in bigger expenses. If your tank over fills with solids, it will begin to force those solids out of the tank, eventually causing it to choke off or fail. This can result in effluent liquid surfacing in your yard. The waste water is not being filtered and treated by the soil.
At this point drain field lines would likely need to be replaced and in some cases the drain field must be completely moved to another part of your property. Sometimes the only other area of your property that will pass a perk test may be uphill. Now you get into even more expense as you will have to install a liquid pump tank in order to pump the effluent liquid against gravity up hill to your new drain field.
So consider the expense of a couple hundred dollars every 3-5 years OR $5,000-15,000 to replace your drain field prematurely.
Allowing a knowledgeable septic professional to pump your septic tank regularly protects your drain fields. It also gives you a “mini-inspection“ many times I can catch issues before they become big issues or simply make you aware of it.
Septic systems are the most expensive “home appliance“ that homeowners own, yet they are the most neglected. Being that septic systems are so “out-of-sight and out-of-mind,” often homeowners don’t call to get their septic pumped until sewage is backing up into their house.
Regularly pumping your tank avoids emergency service call fees and system failure. A big misconception about pumping septic tanks is that they only need to be pumped when they are full. The fact is your tank needs pumped when 1/3 of the capacity if filled with solids and/or the crust on top is more than 12”. Allowing much more than this results in solids getting forced through the outgoing side of the system. Too thick of a crust can cause the inlet line of the tank to clog. A rule of thumb is a family of 4 people on a 1000-gallon septic tank is recommended to be pumped every 3-5 years.