Checklists by equipment
2 lists · 11 items · 15 photosTankless water heater maintenance checklists
Tankless water heater maintenance checklists for the quarterly and annual rounds: 2 free lists, 11 items and 15 photo requirements, each item naming what to look for and the photo that proves it. Work is commonly verified against IPC / UPC plumbing codes; the edition in force is the AHJ's call on each project.
The tankless water heater rounds
Tankless water heater QuarterlyTankless water heater quarterly maintenance checklistInlet screen, venting and condensate checked and delivered temperature verified at a fixture on the quarterly round7 items9 photosTankless water heater AnnualTankless water heater annual maintenance checklistHeat exchanger descaled and flushed and the burner serviced on the annual visit4 items6 photos
Where each walk sits in the schedule
- Tankless water heater quarterly maintenance checklistquarterly
- Every quarter, since a tankless unit gives no warning before it starts short of temperature or throws a fault mid-shift. Run by: The plumbing or maintenance tech on the quarterly mechanical round.
- Tankless water heater annual maintenance checklistannual
- Once a year, and sooner where the water is hard, since scale in the exchanger is what steals temperature and eventually cracks the unit. Run by: The plumbing service tech on the annual service visit.
What most often fails on a tankless water heater
- Inlet filter screen never pulled, so it clogs with debris and the unit modulates down or faults on low flow, read as a failing heater.
- Delivered temperature judged at the unit's display instead of a fixture, so the drop across a long run to the far tap goes unnoticed.
- Error and fault history never read off the controller, so a unit clearing repeated ignition or scale faults on its own is treated as healthy.
- A quick flush run without descaling solution, so scale that's already coating the exchanger passages stays put and output keeps drifting down.
- Burner and flame sensor left untouched, so a unit that's slowly fouling keeps clearing ignition faults until it finally locks out in cold weather.
Verified against
Families only, never clause numbers. Adoption varies by jurisdiction; confirm the edition your authority having jurisdiction enforces before you run a walk against it.
Common questions
- Which tankless water heater maintenance rounds do these checklists cover?
- Tankless water heater quarterly maintenance checklist (quarterly): Every quarter, since a tankless unit gives no warning before it starts short of temperature or throws a fault mid-shift. Tankless water heater annual maintenance checklist (annual): Once a year, and sooner where the water is hard, since scale in the exchanger is what steals temperature and eventually cracks the unit.
- Who runs the tankless water heater maintenance round?
- The plumbing or maintenance tech on the quarterly mechanical round. The plumbing service tech on the annual service visit.
- What most often fails on a tankless water heater?
- Inlet filter screen never pulled, so it clogs with debris and the unit modulates down or faults on low flow, read as a failing heater. Delivered temperature judged at the unit's display instead of a fixture, so the drop across a long run to the far tap goes unnoticed. Error and fault history never read off the controller, so a unit clearing repeated ignition or scale faults on its own is treated as healthy. A quick flush run without descaling solution, so scale that's already coating the exchanger passages stays put and output keeps drifting down.
- Which standards is tankless water heater work verified against?
- IPC / UPC plumbing codes, published by the International Code Council / IAPMO. Adoption varies by jurisdiction. Confirm the edition your authority having jurisdiction enforces before you run a walk against it.
- Can I run these checklists in RTI?
- Yes. Start a free RTI workspace and load any of the 2 lists (11 items in total). The Photo Gate holds the submit button until every mandatory item is answered and its photos are attached, and approved inspections roll into a branded turnover package with a tamper-evident audit trail.