San Antonio does not need a northern blow-out every November. It does need the above-grade parts protected before a hard freeze. That is the backflow, the exposed brass, and any piping that sits in wind on the side of the house.
Boerne sits on the Hill Country edge of our coverage — overnight lows drop faster here than on the south side of town. Hill Country acreage and HOA communities north of SA.
What we do before the freeze
Shut the irrigation supply, drain the assembly, insulate the backflow, and cover hose bibs that share the same wall. A $20 insulating kit beats a $400 RPZ the morning after.
Spring startup is the other half: slow pressurization, a full head check, and a summer schedule. See Winterization & Spring Startup.
After a freeze already hit
Look for cracks at the bonnet, dripping unions, and a relief port that will not seat. Do not keep running the system into a split assembly — that floods the planter and contaminates the test.
San Antonio conditions that change the repair
San Antonio irrigation lives with limestone, caliche, pockets of black clay, Edwards Aquifer hard water, and long hot summers. Those conditions scale nozzles, walk heads out of grade, and punish weak valves.
Boerne is in Kendall County. Hill Country acreage and HOA communities north of SA. That is why a generic statewide watering guide fails here — the soil does not take water the same way, and the mineral load is different.
Twice-yearly checkups (spring startup and a pre-freeze look at the backflow) catch buried heads and weak solenoids before they brown a lawn in July.
Related services
Our Winterization & Spring Startup page covers how we handle this on a live system. If you are in Boerne, start with sprinkler repair in Boerne.
Browse the full services list or all San Antonio service areas.
Quick question
Do San Antonio systems need a full blow-out? Rarely. Protect the above-grade backflow before a hard freeze, then recharge slowly in spring.
When to call
Call Sprinkler Repair Tech if a zone will not shut off, water is pooling toward a foundation, or half the yard is offline in Boerne heat. Those are same-week jobs. Tune-ups and audits book on the next route day.
We are a call-first repair company. Technicians carry solenoids, diaphragms, spray bodies, rotors, and nozzle trees so most Boerne repairs finish in one visit. You get a plain-language explanation of what failed and how to water the soil you actually have.
Photograph the controller program before any upgrade. Label the valve box once we find it. Those two habits prevent a lot of repeat Boerne calls after the next landscaper or freeze.