What does this hot water recirculation pump annual checklist cover?

14 items across 5 sections, covering notice and lockout, pump and check valve, controls, loop balance and delivered temperature, 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 service tech on the annual, able to isolate the pump at the flanges to service the check valve and read the loop cold and hot.

When in the schedule should this walk happen?

Once a year, the pass that isolates the pump to actually inspect the check valve and cartridge and to walk the return legs, rather than assuming the loop is balanced because one gauge near the heater looks right.

Why do these items ask for a photo?

8 of the 14 items call for photo evidence, 10 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 hot water recirculation pump annual inspection?

Check valve never pulled because isolating the pump is awkward, so a valve stuck part-open keeps letting the loop short-circuit and the far legs stay lukewarm all year. Aquastat differential drifted so the pump either runs continuously and wastes energy or cuts out too early and never satisfies the far risers. One return riser balanced closed or airbound, so it reads cold while the pump and the near legs look fine and the complaint keeps coming from the same rooms.

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

Hot water recirculation pump annual maintenance checklist

The annual recirculation pump 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 IPC / UPC plumbing codes, manufacturer's published instructions. Confirm the edition your authority having jurisdiction has adopted.

Start free with this checklist Download as PDF

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.

Notice and lockout

Owner and occupants told before the loop is isolated
Owner and affected occupants warned that hot water may run slow or stop at far fixtures during the window, and told when it is expected back.
No photo
Every circuit feeding the pump and controls locked out
Pump circuit or plug and any controller or timer supply locked and tagged by each worker, proven dead, and held until the pump is closed up and refilled.

Pump and check valve

Pump body confirmed as rated for potable water
Nameplate or casting shows a bronze or stainless body listed for potable water, not a cast-iron heating circulator swapped in on a past call.
Trapped hot water bled off before the pump is opened
With the isolation valves shut, trapped water bled through the drain or vent into a bucket, hands and face clear of the scald, and flow stopping to prove the valves hold.
No photo
Pump isolated and check valve inspected
Isolation flange valves closed, check valve opened and its disc, spring and seat inspected or replaced, cartridge or impeller checked on cartridge circulators, pump reassembled and bled of air.
Flange gaskets and union seals checked on reassembly
Flange gaskets or union O-rings renewed where compressed or cut, flange bolts brought up evenly, or union nuts snugged, and each joint dry once the section is back at line pressure.
Section refilled, air vented and locks removed
Isolation valves opened slowly, air bled at the vent screw or high point, tools and people clear, then locks removed by whoever hung them before the pump is powered for the readings.
No photo
Motor current and bearings checked
Amp draw read against the nameplate, bearings running quiet and cool, no overheating at the motor that points at a dead-headed or airbound pump.

Controls

Aquastat calibration and timer schedule verified
Aquastat setpoint and differential checked against a measured line temperature and adjusted, timer schedule confirmed for occupied hours, pump proven to cycle on and off at the intended temperatures.
No photo
Aquastat sensor secured to the return pipe and insulated
Strap-on or well sensor tight on the return line at the location the manufacturer shows, insulated over so it reads the loop and not the room air.

Loop balance and delivered temperature

Isolation valves operable and return legs proven hot
Isolation and any balancing valves operable and set, return temperature checked at the ends of the risers or legs, each leg confirmed carrying hot water so no branch is running cold or airbound.
Temperature drop across the loop compared with the design
Supply leaving the heater and return at the pump read with the same thermometer, the drop compared with the design and last year to find a leg losing heat.

Return to service

Controls left in auto and occupants told hot water is back
Pump running on its aquastat or schedule with no hand override, far fixtures running hot again, and owner and occupants told service is restored.
No photo
Annual readings filed and dead legs flagged to the owner
Currents, temperatures, settings and parts replaced filed with the pump record, and any capped branch or unused fixture reported for the water management plan.
No photo

What usually sends this back

The failures are almost always the evidence, not the work

Check valve never pulled because isolating the pump is awkward, so a valve stuck part-open keeps letting the loop short-circuit and the far legs stay lukewarm all year.
Aquastat differential drifted so the pump either runs continuously and wastes energy or cuts out too early and never satisfies the far risers.
One return riser balanced closed or airbound, so it reads cold while the pump and the near legs look fine and the complaint keeps coming from the same rooms.

Verified against

IPC / UPC plumbing codes

Common questions

6 answers

What does this hot water recirculation pump annual checklist cover?: 14 items across 5 sections, covering notice and lockout, pump and check valve, controls, loop balance and delivered temperature, 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 service tech on the annual, able to isolate the pump at the flanges to service the check valve and read the loop cold and hot.
When in the schedule should this walk happen?: Once a year, the pass that isolates the pump to actually inspect the check valve and cartridge and to walk the return legs, rather than assuming the loop is balanced because one gauge near the heater looks right.
Why do these items ask for a photo?: 8 of the 14 items call for photo evidence, 10 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 hot water recirculation pump annual inspection?: Check valve never pulled because isolating the pump is awkward, so a valve stuck part-open keeps letting the loop short-circuit and the far legs stay lukewarm all year. Aquastat differential drifted so the pump either runs continuously and wastes energy or cuts out too early and never satisfies the far risers. One return riser balanced closed or airbound, so it reads cold while the pump and the near legs look fine and the complaint keeps coming from the same rooms.
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 10 required photos exist. Approved walks roll into a branded turnover package with a tamper evident record behind every line.