The houses and their pipe
Polybutylene-era slab homes and Hyde Park’s pre-1950 cast iron
Two very different housing stocks, each with its own way of failing.
North Austin filled in during the 1970s and ’80s, mostly with slab-on-grade ranch and two-story houses. Homes plumbed from 1978 to 1995 may carry gray polybutylene supply, and its fittings and pipe walls can give out without warning after years of chlorinated water.
Copper in the same houses has its own habits: pinholes where water runs fast, and corroded fittings under the slab. Where the ground east of I-35 turns to blackland clay, slabs move with the seasons and those lines crack.
Hyde Park is older. Founded in 1891 as Austin’s first suburb, it filled in between the late 1890s and 1935, with the biggest building boom from 1924 on. Bungalows dominate, and many still drain through cast iron that scales shut or splits along the bottom. Raised floors at least make those pipes easier to reach than any slab line.
Old cast iron and the galvanized supply often found beside it are both past their expected life. A camera run shows how much a drain has left, which is worth knowing before a kitchen or bath remodel closes the walls again. Galvanized lines give themselves away with weak pressure and rust-tinted water first thing in the morning.
Local knowledge
Boil-water notices, a historic district and the MUD edge
The water system, the rules and what they mean for pipes inside the house.
Austin Water has issued citywide boil-water notices before. From October 22 to 29, 2018, silt and debris washed down the Llano River overwhelmed treatment. In February 2021, Winter Storm Uri pushed demand so high that pressure collapsed, and the notice held until February 23.
After a notice lifts, flush the faucets, ice maker and filters, and drain a few gallons from the water heater to clear sediment. Uri also showed how exposed attic and exterior-wall pipes are when a hard freeze lasts for days.
Hyde Park joined the National Register as a historic district in 1990, and its bungalows reward repipes routed through crawlspaces and attics. A north-side mailing address does not always mean city water, either: Wells Branch runs its own MUD water and sewer. Texas law makes cities over 5,000 people require plumbing permits, and we pull them when a job needs one.
