What does this water treatment chemical feed system annual checklist cover?

14 items across 4 sections, covering pump calibration, controller and probes, injection and delivery, return to service. 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 water treatment service contractor on the annual service, when the loop can be sampled and the controller taken through its ranges.

When in the schedule should this walk happen?

Once a year, timed with the closed-loop and condenser-water annual so probe drift and pump output get corrected against a real sample.

Why do these items ask for a photo?

6 of the 14 items call for photo evidence, 7 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 water treatment chemical feed system annual inspection?

Metering pump output taken from the dial setting and never checked against a draw-down, so the loop is over- or under-dosed all year. Conductivity probe cleaned but never checked against a reference solution, so the controller doses to a drifted number. Injection quill left in place until it snaps off in the flow because scale was never cleared from it on a service.

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.

Free checklist

Water treatment chemical feed system annual maintenance checklist

The annual chemical feed system service is the deep pass: the measurements, cleanings and tests a quarterly round doesn't reach. This checklist keeps the full service on record with the photos that make it defensible later. Work is commonly verified against manufacturer's published instructions. Confirm the edition your authority having jurisdiction has adopted.

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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.

Pump calibration

Metering pump output verified by draw-down
Pump timed against a calibration column or measured draw-down, actual output compared to the setting and corrected, not read off the dial.
No photo
Pump head flushed with water before opening
Suction moved to clean water and the pump run until product is flushed from the head and discharge line, with the SDS's PPE on, before any wetted part is opened.
No photo
Metering pumps and feed outputs locked and tagged
Every metering pump and controller feed output locked and tagged; head closed up, locks lifted by whoever hung them for the controller tests, then re-locked before the quill is pulled.
Diaphragm and valves inspected
Pump head opened where due, diaphragm and suction/discharge valves inspected for swelling or crystallization, seals replaced per the service kit.

Controller and probes

Test kit reagents and reference solution in date
Reagent bottles and the probe reference solution labels read for expiry and lot, out-of-date stock replaced before any reading from them is trusted.
Probe cleaned and checked against reference
Conductivity or ORP probe pulled, cleaned of scale and film, then checked against a known reference solution and calibrated to it.
No photo
Setpoints and alarms exercised
Controller taken through its dosing and bleed setpoints, low-level and no-flow alarms confirmed to interrupt feed as intended.
No photo

Injection and delivery

Injection point isolated and relieved before the quill
Isolation valve at the quill closed, or that loop section isolated and drained per the site's procedure, pressure relieved at a bleed with face and hand PPE on.
No photo
Injection quill pulled and cleared
Quill removed from the line, scale and crystallization cleared, check valve reseating cleanly, quill reinstalled to the correct depth in the flow.
Tubing runs replaced where degraded
Suction and discharge tubing checked end to end for hardening and cracking, sections replaced where degraded, containment cleaned out.
Bypass feeder drained and inspected inside
Where a pot feeder is fitted, isolated, relieved and drained, interior checked for sludge and corrosion, filter bag or strainer and cap gasket renewed where worn.
No photo
Bleed solenoid and strainer cleaned
On condenser-water systems, bleed solenoid and strainer isolated and cleared of scale, seat checked for weeping, then seen to open on the controller's call once feed is back.
No photo

Return to service

Locks removed and feed restored to auto
Locks removed by whoever hung them, injection and feeder valves reopened, controller in auto, pump seen to stroke and drum level drop, no weep at the reinstalled quill.
Treatment contractor's annual report on file
Report with pump calibration, probe reference results and settings left on file, set against the treatment program's targets, and handed to the owner.
No photo

What usually sends this back

The failures are almost always the evidence, not the work

Metering pump output taken from the dial setting and never checked against a draw-down, so the loop is over- or under-dosed all year.
Conductivity probe cleaned but never checked against a reference solution, so the controller doses to a drifted number.
Injection quill left in place until it snaps off in the flow because scale was never cleared from it on a service.

Common questions

6 answers

What does this water treatment chemical feed system annual checklist cover?: 14 items across 4 sections, covering pump calibration, controller and probes, injection and delivery, return to service. 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 water treatment service contractor on the annual service, when the loop can be sampled and the controller taken through its ranges.
When in the schedule should this walk happen?: Once a year, timed with the closed-loop and condenser-water annual so probe drift and pump output get corrected against a real sample.
Why do these items ask for a photo?: 6 of the 14 items call for photo evidence, 7 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 water treatment chemical feed system annual inspection?: Metering pump output taken from the dial setting and never checked against a draw-down, so the loop is over- or under-dosed all year. Conductivity probe cleaned but never checked against a reference solution, so the controller doses to a drifted number. Injection quill left in place until it snaps off in the flow because scale was never cleared from it on a service.
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.

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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 7 required photos exist. Approved walks roll into a branded turnover package with a tamper evident record behind every line.