Leak detection in Tempe

Almost everything written about home leaks assumes the reader owns the house. In Tempe that assumption is wrong more often than it is right, and it changes the practical problem: the person who notices the damp is frequently not the person who owns the pipe, pays the water bill or decides what gets opened up.

Time is what gets lost in that gap, and a slow leak uses time well. So the useful thing we can do in Tempe is make the evidence transferable — locate the leak, then write down what was tested, what was found and where, with photographs, so a landlord or a property manager is deciding from facts rather than from a phone call.

Tempe is the outlier of this set in two ways at once. Fewer than half its households own the home they live in, and fewer than two in five housing units are single-family — both the lowest figures anywhere we work. The median year of construction is 1983, with more than two in five homes built before 1980.

Source: U.S. Census Bureau, American Community Survey 5-year estimates (2023). Geography: Census place.

A city that runs its own flood irrigation

This is genuinely unusual and it is the most distinctive thing about water in Tempe. The City of Tempe runs its own urban flood irrigation service, delivering Salt River Project water to seventeen city parks and around eight hundred and fifty residential customers, and maintaining more than thirty-seven miles of irrigation mains and over a thousand irrigation valves.

The city also publishes the rhythm: residential flood irrigation deliveries begin at ten at night on Sunday and can take several days to complete, and no irrigation water is delivered in November or December because of the Salt River Project dry-up. That calendar is a diagnostic tool. Water standing on ground in the off period, or a corner that never dries between deliveries, is evidence rather than a coincidence.

Where a lot is irrigated from SRP directly rather than through the city, the ownership rule is the one that matters: Salt River Project’s responsibility ends at its delivery gate, and past that gate the ditches, channels and pipelines are owned, operated and maintained by the homeowners themselves.

Related: irrigation and flood-irrigation leaks and underground leak detection.

Rentals, apartments and shared plumbing

With fewer than two in five units single-family, a great deal of Tempe housing is attached or stacked, and shared plumbing changes the order of work. Water runs along structure, so a wet ceiling proves a path and not a source. Before anyone opens a wall, the loss has to be isolated to a line, and the line to a unit.

That is pressure, valves and listening rather than assumption. It is also why we document everything on multi-unit work: whoever authorises the repair is usually not in the room, and they are entitled to see the evidence rather than take somebody’s word for it.

Related: multi-unit and commercial detection and water leak detection.

Housing old enough for the copper era

The median build year of 1983 with a large pre-1980 share puts a lot of Tempe housing in the copper-under-slab period. Copper of that era gives way at a bend, or where the line has spent decades rubbing on a rebar chair, so the failure point and the wet carpet are rarely in the same room, and the oldest housing reaches back into the galvanized and early-copper window, which corrodes and pinholes and leaks slowly for a long time.

Tempe is among the cities behind the Smart Home Water Guide, an Arizona Municipal Water Users Association publication put out by ten Valley cities together, which takes a homeowner through the first checks one at a time. The meter test in it is the single most useful thing a tenant or an owner can do before calling anybody.

Related: slab leak detection and high water bill investigation.