Home / Peoria, AZ / Old Town Peoria
The original townsite, 85345
Plumber in Old Town Peoria, AZ
Almost all of Peoria was built after 1970. Old Town was not. Around the original townsite the housing and the commercial buildings go back to the 1880s and 1920s, which means pipe materials the rest of the city never had. Call the Peoria, AZ number and we connect you with a licensed plumber working 85345.
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About this site: we take the call and pass it to a licensed plumbing contractor serving Old Town and south Peoria. We are not the contractor and do not carry a licence ourselves. The firm that attends quotes you directly, and you can look up its Arizona licence free through the Registrar of Contractors.
Is my Old Town house old enough to have old pipe?
Find the build year first, because in this part of Peoria it genuinely decides what you are dealing with. A house from before about 1960 may still have galvanized steel supply lines, cast iron drains inside the walls and a clay sewer lateral out to the street, and all three fail in ways newer plumbing does not. A house from the 1980s or 1990s, which is most of the wider 85345 ZIP, has copper or plastic and the problems are worn-out parts rather than failing material. The county assessor record or your own paperwork will give you the year, and a plumber can confirm the pipe from one exposed section at the water heater.
Why Old Town has old pipe and the rest of Peoria does not
Peoria was settled in November 1886 by families who came from Peoria, Illinois, with Albert J. and Elizabeth Straw recorded as the first residents. The plat map was filed with the Maricopa County recorder on May 24, 1897. The town was not incorporated until June 7, 1954, when it had 1,925 residents and covered 720 acres. The city that surrounds Old Town today, nearly 180 square miles of it, came later.
One event set the character of the downtown core. A destructive fire in 1917 pushed the town to rebuild in more substantial materials, which is why so many of the surviving commercial buildings along Washington Street and 83rd Avenue carry a 1918 date. The town well dates from 1889 and still stands at Osuna Park, at Grand and Washington. The Presbyterian Church dates from 1899, Central School from 1906, the Paramount Theater from 1920, Peoria High School and the Masonic Lodge from 1922, Wilhelm’s Garage from 1928 and the Peoria Underpass from around 1930.
On the residential side the oldest surviving house is the Sosnoskie House of 1905, with the Kosier House from 1912 and other homes dating between the 1880s and the late 1940s. So the pre-1950 housing here is a real, documented layer, not a vague claim about an older neighbourhood. It is also a small layer: the wider 85345 ZIP is dominated by 1980s and 1990s construction, with 7,659 homes recorded as built between 1980 and 1989 and 4,933 between 1990 and 1999.
Build era and what it usually means for your pipes
This is the pattern for American housing of each era, not a survey of individual Peoria houses, so treat it as what to expect rather than what you definitely have. A plumber confirms it on sight.
| Build era | Supply lines | Drains and sewer | What tends to go wrong |
|---|---|---|---|
| 1880s to 1910s | Galvanized steel is common at this age, often partly replaced over the years | Cast iron inside, clay lateral to the street | Low pressure throughout, repeat drain blockages, roots in the lateral |
| 1920s to 1940s | Galvanized steel, sometimes with later copper sections | Cast iron inside, clay lateral | Rust-narrowed supply pipe, scaled cast iron, joint failures |
| 1950s to 1960s | Galvanized or early copper | Cast iron | Mixed-material joints corroding where old meets new |
| 1970s | Copper | Cast iron or early plastic | Pinhole leaks in copper, ageing cast iron stacks |
| 1980s to 1990s | Copper | ABS or PVC | Not a material problem: worn valves, original water heaters, failing supply hoses |
- Polybutylene piping is sometimes raised in discussions of 1980s housing. No verified information exists on whether it was used in Peoria, so this page makes no claim either way. Ask the plumber what they actually find.
- Mixed materials are normal in a house this old, because sections get replaced piecemeal over decades. The weak point is often the joint where two different metals meet.
Sources: Wikipedia, List of historic properties in Peoria, Arizona; city-data ZIP 85345 profile.
What fails in Peoria’s older housing
These are the problems the rest of the city will not see for another thirty years.
Roots in a clay sewer lateral
Clay pipe is laid in short sections with joints, and roots find the joints. Blockages that come back a few weeks after a cleaning are the signature.
Galvanized pipe closing up
Steel supply pipe rusts inward until the opening is a fraction of its original size. Poor pressure everywhere at once, rather than at one tap, is the clue.
Scaled cast iron drains
The inside of old cast iron waste pipe becomes rough and narrow, so it holds onto grease and paper that a smooth pipe would carry away.
Failing joints between materials
Where a previous owner joined copper to galvanized, or plastic to cast iron, the transition is often where the next leak appears.
Original fixtures with no parts
A valve from the 1950s may have no cartridge available anymore. Replacing the fixture is sometimes the only honest option.
Water heaters in tight spaces
Older houses were not built around modern tanks, so access is poor and venting and clearance may not meet current code when the heater is replaced.
Mature trees and your sewer line
The old townsite has something the new subdivisions do not: large, long-established trees on small lots. That is pleasant to live with and hard on a sewer lateral. Roots do not break into sound pipe out of nowhere, they follow moisture to a joint or a crack that is already weeping, then grow into the opening and widen it.
The practical sign is a blockage that returns. If a main line was cleared and is slow again within a month or two, the issue is almost certainly the pipe rather than what is going into it. This is where a camera inspection earns its fee: it distinguishes a single invaded joint, repairable on the spot for far less than a full replacement, from a run that has collapsed or bellied, where lining is no longer an option.
One Peoria-specific cost factor: caliche. The University of Arizona explains it as a hardpan formed where lime has cemented the soil particles together, and the band of it can be anything from a thin crust to several feet deep. Excavating through that is slow going and awkward to quote accurately. So ask about the trenchless routes, lining the existing pipe or bursting a new one through the old path from a couple of small pits, especially where the run passes beneath a mature tree you would rather not lose.
Shops, restaurants and the Washington Street buildings
Old Town is not only houses. The commercial buildings along Washington Street and 83rd Avenue date largely from 1918 to 1930, and several now hold restaurants, bars and cafés, with the Peoria Center for the Performing Arts and the Paramount Theater anchoring the district.
Commercial plumbing in a century-old building brings its own problems. Grease is the main one: a kitchen line in an old cast iron drain scales and narrows, and grease sticks to the rough interior rather than passing through. Grease interceptors need servicing on a schedule, and a blocked kitchen line in a restaurant is a closed-for-the-evening problem rather than an inconvenience.
The other issue is shared and hidden infrastructure. In a building subdivided over decades, the shutoff for your unit may not be where you expect, the stack may be shared with a neighbouring tenancy, and nobody may have a drawing of it. If you run a business in one of these buildings, find out where your isolation valve is before a Friday evening teaches you.
- Keep grease interceptor servicing on a schedule, not on demand
- Locate your unit’s isolation valve and label it
- Expect a camera inspection to be the first step on a recurring kitchen blockage
- Floor drains that are rarely used dry out and let smells through, so run water into them
If you are a landlord or renting here
Around 34 percent of households in the 85345 ZIP are renters, a noticeably higher share than in the newer north Peoria ZIPs, so a good number of calls about Old Town plumbing come from landlords, property managers and tenants rather than owner-occupiers.
The practical point for tenants is that an emergency repair to the building’s plumbing is normally the landlord’s responsibility, and you want it reported in writing with the time and date, not just mentioned by phone. Photograph the water before anything is cleaned up. The practical point for landlords is that in a pre-1960 property, the repeat-callout pattern is usually telling you something about the pipe rather than the tenant. Two blockages in a year in the same line is a camera inspection, not a third cleaning.
Redfin has reported a median sale price around 320,000 dollars for Old Town Peoria against a citywide median of 463,600, though the sale volume behind that figure is very low, so treat it as directional rather than precise. Either way, the gap is real, and it is part of why this part of the city has a different mix of owners and renters from the rest of Peoria.
Old Town Peoria plumbing questions
Still not sure? Call and ask the dispatcher before anyone is sent out.
The rest of the Peoria area
For comparison, the newer communities north and west of here.
The bottom line
Old Town is the one part of Peoria where the pipe material itself is the problem. Find your build year, because a pre-1960 house may have galvanized supply lines, cast iron drains and a clay sewer lateral with roots in the joints, while a 1990s house a few streets away has none of that. On any blockage that comes back, pay for the camera inspection rather than another cleaning, and ask about the trenchless options before anyone quotes you for digging through caliche. To get someone out, use the Peoria, AZ line above: it reaches a licensed contractor working 85345, and you approve the figure before any work happens.
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