The Pool Running Cost Plan
A pool pump and heater worked from your own numbers: the head read off your gauges, the flow read off the pump's curve instead of its box, the slowest speed that still turns the water over, and a season's running and heating bill at your rate
Our Pump Turnover Calculator takes your pump's flow and notes, in its own words, that real flow is lower because of plumbing head loss and a dirty filter. It cannot say how much lower, and the biggest number on a pump's box is its flow at zero head, where no pool pump works. The Pool Running Cost Plan works it out on your pool. In the worked example, a 19,150 gallon pool needs 39.9 GPM to turn over in 8 hours; its gauges read 46.1 ft of head, where a pump sold as 110 GPM delivers 71.46, so a turnover takes 4.5 hours, not 3. A bigger pump costs $37.50 more a season and pushes past the filter's 80 GPM rating, while a variable-speed pump at 51% clears the target for $55.50 a season instead of $217.50, as long as the filter is clean: loaded to 26 psi, the same speed falls to 24.31 GPM. The heater's 1,916,532 BTU are priced by fuel, beside an overnight cover test you run yourself. Every figure is computed by the code behind our calculators, and every pool, pump curve, price and reading is an example for you to replace; low-speed watts are ideal figures your pump's display replaces. It covers no pool chemicals. It carries the safety a pool's equipment and ownership need: GFCI protection and an electrician qualified in pool and spa work, drain covers, a four-sided fence with a self-closing, self-latching gate, a Water Watcher, and heated water at or below 104 F. Inside: seven steps, four printable working pages, reference tables and a quickstart, plus a personalised sheet worked from the numbers you enter in our calculators.
What’s inside
- The Target Flow Rule: your gallons worked once, and the flow that turns them over in your run window
- The Gauge Rule: total head from your filter pressure and suction gauges, clean and before cleaning
- The Curve Rule: the flow read off the pump's curve at your head, three pumps compared, and the filter's maximum flow
- The Kilowatt-Hour Rule: hours, kWh, a day and a season at your own electricity rate
- The Square Rule: the slowest variable speed that still clears the target, and what a loaded filter does to it
- The Cover Test Rule: the heat-up priced by gas, heat pump or electric, and the overnight drop measured cover off and on
- The Safe Water Rule: GFCI and a qualified electrician, drain covers, a four-sided fence and gate, a Water Watcher, and a season budget
- Four printable working pages: pool and gauge sheet, curve sheet, run plan and bill sheet, heat and cover log
- Reference tables: turnover hours for six volumes and six flows, gauge to feet of head, speed and energy, and units
- A quickstart checklist and a personalised sheet worked from your own calculator inputs
Run one of the free calculators first and buy from that page, and this sheet is computed from your own figures. Buy from here and the pack still arrives complete — the sheet simply has no numbers of yours to work from yet.
14-day refund, no questions asked. If the pack is not what you needed, email support@graburl.com and we refund you in full — you do not have to justify it or delete the file. Full policy.
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