In normal conditions, your septic tank should be pumped just about every one to three years, with respect to the size of the tank and the number of people in your home. If pumping is carried out in a timely manner, it is likely that you will lay aside yourself the expense of repairing or solid waste tank over time. Although it is possible for a home owner to pump his or her own septic tank, this may not be the best option. Sludge circulated out of the reservoir should be stored for transfer in appropriate containers and discarded following important security procedures.
Ideally, water in your tank flows through in the course of several days while materials on the bottom happen to be broken down by bacteria. Normal water is then carried through drain pipes to the drainage (or leach) field, exactly where it is distributed in the soil. The size of your drainage field depends on the type of soil. Clay, for instance, holds a limited sum of water.
Any new solid waste tank/sewage treatment unit must have both planning agreement and building regulations acceptance. If it's been mounted since 1 January 2015 and also you didn't get these kinds of permissions then you will need to apply retrospectively for these people both. If your home is within 30 metres of the mains sewer the Environment Agency will need you to connect to the mains instead of installing a sewage treatment unit; developers building more than one property need to multiply the 30m by number of dwellings.
In reply to Bjartur i Sumarhus: Not really an expert but I actually moved into a classic house c. 1910 regarding 8 months ago which in turn has a septic tank which i'm assuming was built roughly the same time frame (could be wrong). I suppose time will tell, whether I have any septic problems far into the future, therefore i is trusting that the product does what it says. However the distribution method, the packets, will be simple to use, clean to take care of, dissolves quickly.