Free checklist
Domestic water storage tank quarterly maintenance checklist
A quarterly domestic water storage tank round is short on purpose: it catches the wear items that fail between annual services. This checklist is sized for a tech with a phone. Every item says what to look at and the photo that proves the round happened. Work is commonly verified against the applicable plumbing code, manufacturer's published instructions. Confirm the edition your authority having jurisdiction has adopted.
The checklist
Every item, and the photo evidence it needs
The photo count on each row is what RTI would require before the item can be submitted. Work the list here and watch the gate hold, or load it into RTI and let it enforce the real thing.
Sanitary integrity
Access hatch, seals and shell closed and intact
Hatch closed and gasketed, no light or debris entry around the lid, shell and fittings sound with no leaks or corrosion breaching the tank.
Overflow and vent protected with intact screens
Overflow terminates with an air gap, vent and overflow screens present and unbroken, no insect or vermin entry path, no back-siphonage risk.
Hatch locked against unauthorized entry
Hatch lock or hasp fitted and locked, key held by the owner, no sign of tampering or forced entry at the hatch, ladder or roof access.
Every tank connection traced for cross-connections
No non-potable, process or drain line tied into the tank or its piping, fill and outlet as drawn, no hose left on the drain or sample taps.
Level and turnover
Level controls holding the tank in its working band
Level control operating and holding the tank between its set points, fill valve closing off cleanly, tank turning over rather than sitting near-full and stagnant.
Level alarm status and history checked where fitted
No high or low level alarm standing at the controller or BAS, alarm history since the last round reviewed, and any repeat alarm traced to its cause.
No photo
Screens and vents
Screens and vents clear and unobstructed
Vent path open and screened, no debris blocking the vent, no crushed or painted-over screen that would restrict the tank breathing as it fills and drains.
Exterior and supports
Tank supports, base and anchorage sound
Legs, saddles, stand or pad free of corrosion, cracking or settlement, anchors in place, connected piping supported and not straining the tank nozzles.
Insulation and heat tracing checked where fitted
Jacket dry and intact with no wet or missing insulation, tracing controller powered and indicating in cold weather, damage reported to the owner.
No photo
Water quality
Disinfectant residual read at the tank outlet
Residual measured at the outlet or nearest sample tap with the site's test kit and compared with the range set in the owner's water management plan.
Stored water temperature read at the tank outlet
Temperature read at the outlet sample tap and compared with the owner's water management plan, a tank running warm flagged as a Legionella growth risk.
Readings logged and deviations reported to the plan holder
Residual, temperature and level readings logged to the tank record, any reading outside the plan reported to the owner's water management lead the same day.
No photo
What usually sends this back
The failures are almost always the evidence, not the work
- An overflow or vent screen is torn or missing, giving insects or vermin a path into stored potable water.
- Level controls hang so the tank barely turns over, and stagnant water in the bottom goes stale.
- A hatch gasket or seal is bad, so surface water or debris can enter around the lid.
Common questions
6 answers
- What does this domestic water storage tank quarterly checklist cover?
- 12 items across 5 sections, covering sanitary integrity, level and turnover, screens and vents, exterior and supports, and more. Each item spells out what the person walking the job is actually looking for, not just a box to tick.
- Who should run this inspection?
- The plumbing or maintenance tech on the quarterly round.
- When in the schedule should this walk happen?
- Every quarter, walked with the domestic water equipment. A stored-water sanitary problem is invisible until someone tastes it or a sample fails.
- Why do these items ask for a photo?
- 9 of the 12 items call for photo evidence, 11 photos in all. A checklist answer without the photo is a claim; the photo is what makes the record worth something in a dispute and lets a reviewer approve work without re-walking the job.
- What most often fails a domestic water storage tank quarterly inspection?
- An overflow or vent screen is torn or missing, giving insects or vermin a path into stored potable water. Level controls hang so the tank barely turns over, and stagnant water in the bottom goes stale. A hatch gasket or seal is bad, so surface water or debris can enter around the lid.
- Can I use this checklist in RTI?
- Yes. Start a free RTI workspace, build this list as a checklist, and the Photo Gate holds the submit button until every mandatory item is answered and its photos are attached. Approved inspections roll into a branded turnover package with a tamper evident audit trail.
Run it with the Photo Gate
A checklist nobody can submit half-finished
Load this list into RTI, stick a QR tag on the area it covers, and the submit button stays locked until every mandatory item is answered and the 11 required photos exist. Approved walks roll into a branded turnover package with a tamper evident record behind every line.
See all 508 checklists · 6741 items and 5984 photo requirements in total.