We separate what needs doing now from what is worth planning for, because those are different conversations and different budgets.
The number people want is an interval, and the honest answer is that it comes off the house rather than off a chart. Two people over a 1,500 gallon tank can go a long time. Six people over a 1,000 gallon tank cannot. What actually matters is the sludge depth when we open it, because that is the measurement that tells you whether the last interval was right. We take it every visit and tell you the number, so over two or three services you end up with a schedule that fits your household instead of a guess somebody made once.
Our trucks carry waterproof high-definition camera equipment, locating gear, cable machines and jetting capability, which means most calls are diagnosed and resolved on the same visit rather than turning into a sequence of appointments.
We work a wide area because the customers spread out over forty-four years, and people keep calling the number they know. If you are outside the usual radius, call and ask. We cover more ground than most shops our size.