Plumbing Inspection Checklist

The isolation valve register earns its place at the top of this document because it is the only part of the inspection whose value is realized entirely in the future, under conditions nobody controls. Everything else here describes the installation as it is: this pipe is corroded, that trap is dry, this device has not been tested. The register describes what will be possible at the moment something fails. A burst pipe is a problem that gets worse at a rate measured in liters per minute, and the entire question in the first ten minutes is which valve stops it. If the register exists, is accurate, says what each valve isolates in words rather than numbers, and has been checked for accessibility and operation, that question has an answer and somebody can act on it. If it does not, the building floods while people open cupboards. The three separate columns matter for the same reason. A valve that is present but behind a boarded-up access panel cannot be used. A valve that is reachable but unlabeled can be used only by somebody who already knows the system, who is rarely the person on site at two in the morning. A valve that is labeled and seized is the worst of the three, because it is found, trusted, turned, and does not close, and the time spent discovering that is the time the water had. Checking that each one actually operates is the part most commonly skipped, since it means turning valves in a live building, and it is the part that converts the register from a drawing into a control.

Six valves on the register could not be reached, and that is the most consequential line on the sheet even though nothing about it is urgent today. Eighty six percent accessibility reads tolerably, and it means that on any given failure there is roughly a one in seven chance the valve that would stop it is behind a panel somebody has boarded over, inside a tenant demise with no key, or above a ceiling that needs a ladder nobody has. The right response is not to replace plumbing but to fund six access panels and a key, which is cheap and almost never prioritized because it fixes a problem that has not happened yet. The overnight figure is the opposite kind of finding: it is happening right now and it is already on the bill. The building used 2.4 while it was empty against an expected figure under 0.5, and the balance is unexplained flow somewhere in the distribution. Two repeat blockages at the same riser point in the same direction, since repeat blockages at one location are a fall, a bend or a joint rather than anything anybody flushed. The two high risk defects both follow from that: trace the flow section by section, and survey the riser rather than clearing it for a third time. The hot water plant this distribution feeds has its own document, the commercial water heater maintenance checklist, and the wider building walk is the building maintenance checklist.

These two sit at opposite ends of how easy it is to get work approved, which is worth saying plainly because it explains why most buildings have neither. The overnight meter test produces a number with money attached to it, this month, and that is an easy case to make: an unexplained 2.4 overnight is flow that appears on every bill until somebody traces it, and the cost of tracing it is small against the cost of continuing to pay for it. The valve register produces nothing at all until the day it is needed, and on that day it produces the single most valuable piece of information in the building. Six inaccessible valves is not a problem in any month in which no pipe bursts, which is almost every month, and the access panels therefore sit below almost everything else on a list of competing spend. The honest argument for funding them is not that a burst is likely but that the cost is asymmetric: the panels are cheap, and the difference between stopping a burst in four minutes and stopping it in forty is several floors of ceiling, carpet and whatever the tenants had on the floor. It is also the one finding in this document that degrades on its own, because every refit, every new partition and every ceiling replacement can quietly bury a valve that was accessible at the last inspection, which is why the register has to be re-verified rather than carried forward. Hot water generation sits outside this page entirely and belongs to the commercial water heater maintenance checklist, a general condition walk of the same building is the facility inspection form, and standing water from a drainage defect usually surfaces first on a floor inspection checklist.