Printable bucket test
Print the sheet, mark the waterline, and compare pool loss against a control bucket to separate evaporation from real water loss.
Measurement matrix
What kind of loss is it?
Start with the loss pattern before you guess at buried plumbing.
Pump on
Faster loss while the system runs points toward circulation-side leaks or equipment.
Pump off
If the loss is similar with the system off, evaporation, splash-out, or a slow structural leak becomes more likely.
Autofill masking
A stable waterline can hide a real leak if the autofill is constantly compensating.
Fast action
Mark the waterline, run a bucket test, and compare pump-on and pump-off loss before you guess at buried plumbing.
Wrong tool: do not dig or pressure-test until measured loss is real and simple masking is ruled out.
Reassess after each measurement window and after each isolation change.
Prove the loss before you chase the leak
Bucket test first, isolation second
Best when
- Bucket test first, isolation second
Check before you start
- 24-hour water level drop
- Pump-on vs pump-off loss comparison
Stop if
- Do not start digging or calling excavation services before proving the loss is real
- Do not ignore autofill masking — it can hide a leak for weeks
- Do not pressure-test buried lines before isolating equipment-pad leaks first
Start here
Mark the waterline, run a bucket test over 24 hours, compare pump-on vs pump-off loss, and inspect obvious pad leaks before talking excavation.
Skip this
- ✕Do not start digging or calling excavation services before proving the loss is real
- ✕Do not ignore autofill masking — it can hide a leak for weeks
- ✕Do not pressure-test buried lines before isolating equipment-pad leaks first
Check these first
24-hour water level drop / Pump-on vs pump-off loss comparison
1
Mark the waterline
Start with a simple visible mark so the next measurement means something.
2
Run a bucket test over 24 hours
This simple split can narrow the problem dramatically.
3
Compare pump-on vs pump-off loss
Use system behavior to narrow whether the loss changes under circulation.
4
Inspect obvious pad leaks before talking excavation
Equipment-pad leaks are cheaper and more common than buried-plumbing assumptions.
5
Know when to escalate
Pressure testing and advanced leak detection make sense once the simple steps point to a real buried or structural problem.
Resources (4)
Owner vs pro boundaries
Use the escalation guide when water-loss work starts moving toward pressure testing, structural assessment, or unsafe excavation assumptions.
Bucket test sheet
Use the printable sheet to compare pool loss against evaporation before you guess at the source.
Pressure testing handoff
Use the handoff guide to package measurements, photos, and valve mapping before a leak specialist pressure-tests hidden plumbing.
Water loss decision tree
Use the decision tree when you still need to separate evaporation, splash-out, autofill masking, and leak symptoms before escalating.
Leak Work Boundary
Owner-safe leak work is mostly measurement and visual isolation. Once the task becomes invasive, the cost of being wrong rises quickly.
OWNER-SAFE
- ✓ Mark the waterline, run a bucket test, compare pump-on and pump-off loss, and inspect obvious equipment-pad leaks.
- ✓ Use dye testing around accessible fittings, skimmers, and visible cracks when the procedure is straightforward.
- ✓ Document valve positions, measurements, and photos before calling a leak-detection specialist.
PRO-ONLY
- ★ Pressure-test underground plumbing, isolate buried lines, or excavate deck and yard areas.
- ★ Diagnose shell movement, structural cracks, or hidden plumbing failures under decking and hardscape.
- ★ Interpret advanced leak-detection equipment, sonic tools, or hydrostatic-relief interactions.
STOP NOW
- ⚠ The water loss is severe enough to threaten pump prime, skimmer operation, or heater flow.
- ⚠ Soil is washing out, decking is moving, or cracks suggest shell or plumbing movement.
- ⚠ You are about to dig, pressure-test, or force valves without a defined leak-isolation plan.
Educational guidance only. Verify labels, manuals, local code, and site conditions before acting. Stop for electrical, gas, structural, drain, drowning, injury, emergency, or chemical-mixing risk.