SepticBossPro Blog — Scheduling & Dispatch

Using Tank Size to Plan Septic Pump Routes and Truck Loads

A pump truck has a hard limit. Once it is full, it has to go dump, and depending on where your disposal site is, that can cost an hour or more. Scheduling without knowing tank sizes means trucks fill up at the wrong time, in the wrong place. Using tank size to plan loads is one of the simplest ways to get more pump-outs out of each day.

Why Gallons Matter to the Schedule

Residential tanks come in a range of sizes, and commercial tanks and grease traps vary even more. A truck that can comfortably handle three typical residential tanks might only take two large ones. If the office knows each tank's size in gallons, it can roughly plan a truck's day around full loads. This picks up where Scheduling Around Lid Depth: Why Dig Time Belongs on the Septic Job Ticket left off: lid depth tells you how long the stop takes, and tank size tells you how much the stop costs in capacity.

This is not complicated math. It is simple addition of what is already in your records. The difference is having the numbers in front of you when you build the day instead of in a filing cabinet or a driver's memory.

Recording Tank Size Reliably

Tank size goes on the property record in SepticBossPro. For returning customers, it is already there. For new customers, the homeowner may know from paperwork, or the county may have a permit on file. If not, the driver can estimate on the first visit and note it. Over time, your records get more accurate and your planning improves with them.

For grease traps and commercial tanks, size matters even more because the volumes and disposal rules can differ from residential septage. Record the size and any special handling notes on the property so the right truck gets sent and the driver is not surprised.

Building Loads Around the Dump Site

Think about where the truck will be when it fills up. Ideally, a full load happens near the disposal site, not on the far side of the county. When pulling jobs from the waiting list, look at the route map and plan a loop: a cluster of pump-outs that fills the truck, a dump run, then another cluster. Tank sizes on each stop let you plan that loop with reasonable confidence.

A simple habit: before finalizing a truck's day, add up the gallons on its stops and compare to the truck's capacity. If the total crosses one load, note where the dump run will happen. If it crosses two, ask whether the day is realistic or whether a stop should move to another truck.

Mixing Job Categories Wisely

Not every job fills the truck. An Inspection might involve pumping, but a Repair or Drain Field job may not use tank capacity at all. Pairing a capacity-heavy morning with a repair job in the afternoon can balance the day. Job categories on the dispatch board make it easy to see what kind of day each truck has ahead of it.

Inspections are worth a separate thought, because some involve a full pump and some do not. Note on the job whether pumping is expected so the dispatcher counts the capacity correctly. A truck that assumes an inspection is dry and then has to pump a large tank can lose its afternoon.

Accounting for Surprises

Tanks are not always the size the paperwork says, and some are fuller than expected. Build a little margin into each truck's plan. When a driver finds a discrepancy, they can note it and the property record gets corrected. A tank listed as 1,000 gallons that turns out to be a 1,500 is worth fixing once so it never surprises a driver again.

The same applies to lid depth and location notes. Every correction recorded on the property makes the next schedule more accurate. Drivers should see it as part of finishing the job, not as paperwork.

Tank Size as a Pricing and Cycle Tool

Tank size also feeds pricing and recurring cycles. Many companies price pump-outs by gallon range, so having the size on file makes estimates and invoices consistent. It also informs how often a tank should be pumped. Using tank size this way is part of what makes dedicated septic route and dispatch software more useful than a calendar.

When you set a recurring job after a pump-out, the tank size on the record helps you choose a sensible interval, and the reminder goes out when the time comes. Size, cycle and price all come from the same record, so the numbers stay consistent from booking to billing.

Know the gallons, plan loads around your dump site, and leave a little margin. Your trucks will spend more time pumping and less time driving full.