Most people asking about irrigation system types are actually asking about three separate decisions at once. Delivery method is how water reaches plants, meaning in-ground sprinklers, drip, soaker hose, or an above-ground sprinkler on a hose. Control method is what decides when watering happens, from a hand-turned faucet to a weather-based controller. Water source is where the water comes from, usually municipal service or a private well. A smart system is not a delivery type, it is a control choice. A well-fed system is not a delivery type either, it is a source choice. Separating the three makes the whole subject much easier, and it explains why two systems that look identical can behave nothing alike.
This guide covers each axis, then filters the options through what actually works in this climate.
Three Choices People Treat as One
Any real system is one option from each column.
| Delivery method | Control method | Water source |
|---|---|---|
| In-ground sprinklers | Manual faucet | Municipal service |
| Drip and micro-irrigation | Mechanical hose timer | Private well |
| Subsurface drip | Clock controller | Rain barrel or cistern |
| Soaker hose | Weather-based controller | Pond or surface water |
| Above-ground portable sprinkler | Soil moisture control | Combination of the above |
Reading it this way clears up common confusion. Adding a weather-based controller to existing in-ground sprinklers changes the control column only. Drilling a well changes the source column only. Neither requires touching the delivery method, which is where most of the cost sits. That distinction shapes what a walkthrough with Evergreen Contracting & Irrigation is actually assessing.
In-Ground Sprinklers
The default for lawns, and the only delivery method that waters large turf areas evenly without someone moving equipment.
Water travels from a backflow assembly along a buried mainline to electric valves, then out through laterals to pop-up heads. Three head types cover most work, and they differ in how fast they apply water rather than in quality:
- Spray heads throw a fixed pattern with no moving parts and a relatively high application rate. Suited to small and medium areas.
- Rotors sweep a gear-driven stream back and forth at a much lower application rate. Suited to large open lawn.
- Rotary nozzles send multiple rotating streams from a spray body, at a low rate with good wind resistance. Suited to medium areas.
Because rotors and spray heads apply water at very different rates, they cannot share a zone. That single rule accounts for a large share of poorly performing systems.
Suits: lawns of any size, irregular shapes, slopes, new turf establishment. Does not suit: planting beds, very small flat lawns a hose covers easily.
This is the delivery method most irrigation services in this region are built around, with other types added for beds.
Drip and Micro-Irrigation
Drip delivers water slowly at the root zone through emitters rated in gallons per hour rather than gallons per minute, commonly 0.5 to 4 gallons per hour each.
Three variations:
- Emitter tubing and dripline, with emitters pre-installed at regular spacing. The standard for planting beds, laid on grade under mulch.
- Individual emitters on distribution tubing, placed plant by plant. Suited to specimen shrubs and trees with different needs.
- Subsurface drip, buried in soil. Rain Bird produces emitter tubing specifically for subsurface use with a copper shield to prevent root intrusion into the emitters, which is the failure mode that ruins buried tubing not designed for it.
Drip runs at much lower pressure than sprinklers, roughly 15 to 30 psi, so every drip zone needs its own valve, a filter, and a pressure regulator. It can share a controller, mainline, and backflow assembly with sprinklers but never a zone.
The efficiency case is strong. The U.S. Environmental Protection Agency reports drip systems use 20 to 50 percent less water than conventional pop-up sprinklers by delivering water directly to roots and cutting losses to wind, runoff, evaporation, and overspray.
Suits: planting beds, shrubs, trees, vegetable gardens, narrow strips, slopes. Does not suit: turf, except as purpose-built subsurface systems.
Soaker Hose
Soaker hose is porous tubing that seeps water along its entire length rather than through engineered emitters. It is the cheapest delivery method and it has real limits.
| Drip | Soaker hose | |
|---|---|---|
| How water exits | Engineered emitters at set spacing | Pores along the whole length |
| Output | Typically 0.5 to 4 gallons per hour per emitter | Roughly 0.5 to 1 gallon per foot per hour |
| Control | Water placed exactly where wanted | Wets a continuous strip |
| Uniformity | Consistent along the run | Drops off with distance and elevation |
| Burial | Purpose-built products designed for it | Rain Bird notes burying often leads to root penetration and leaks |
| Lifespan | Designed for years of service | Rain Bird notes frequent replacement is common |
| Repair | Splice the damaged section | Difficult |
Soaker hose still needs a pressure regulator, since full household pressure will damage it.
Suits: a single vegetable row or a small bed, on a tight budget, above ground. Does not suit: anything permanent, anything buried, anything where even coverage matters.
Above-Ground and Portable Sprinklers
Worth taking seriously rather than dismissing, because for some properties this is the correct answer.
- Oscillating sprinklers cover rectangular areas and suit small flat lawns.
- Impact sprinklers throw farther and handle wind better.
- Traveling sprinklers follow a hose across a lawn, which suits large open areas without a permanent system.
The honest case for these: a small flat lawn that a hose sprinkler covers in one or two placements does not justify an in-ground system, since backflow assembly and permit costs are largely fixed regardless of system size.
The case against: someone has to move them, they cannot water irregular shapes evenly, and they run whenever a person remembers rather than on a schedule.
Suits: small properties, temporary needs, new seed on a specific area, renters. Does not suit: large or irregular lawns, slopes, anyone who travels.
Control Method Is a Separate Decision
This column changes independently of delivery, and it is where the largest efficiency gains sit.
- Manual. A faucet and a person. Free and unreliable.
- Mechanical hose timer. Screws onto a spigot and runs a fixed duration. Cheap, adequate for a single drip zone in beds.
- Clock controller. The traditional in-ground controller, running fixed durations on fixed days. Reliable, and it waters the same in a wet May as a dry August.
- Weather-based controller. Adjusts run times to actual conditions. EPA reports a WaterSense labeled controller saves an average home nearly 7,600 gallons a year compared with a clock timer.
- Soil moisture control. Reads moisture in the root zone and waters only when needed.
The important point is that upgrading control does not require touching pipe. On a sound system with poor scheduling, smart system installation is a controller swap and a sensor rather than a project.
Water Source Is the Third Axis
Source affects design more than most people expect.
Municipal service delivers relatively steady pressure. Design proceeds from measured static pressure and available flow, and a backflow assembly is required by the supplier’s cross-connection program.
A private well cycles between the pressure tank’s cut-in and cut-out settings, commonly 30 to 50 or 40 to 60 psi, so pressure swings during a run. Systems are designed to the low end of that band, zone flow must stay within what the pump delivers continuously to avoid short cycling, and an inline filter matters because wells carry sand and iron that municipal supplies filter out.
Rain barrels and cisterns work for bed watering at low pressure. Penn State Extension covers rain barrels in its home gardening guidance. Gravity-fed pressure is too low for sprinklers but can serve drip with the right components.
Ponds and surface water appear on larger rural properties and need pumps, filtration, and attention to withdrawal thresholds.
Never cross-connect a well with public water. The plumbing code and DEP cross-connection rules both prohibit it. Establishing which source a system will use is the first design decision in any irrigation system installation, because everything downstream depends on it.
What Suits Central Pennsylvania and What Does Not
Four regional conditions filter the options.
Everything must be drainable. With the lower Susquehanna Valley averaging fewer than 100 days a year below freezing and a freeze-free season of roughly 170 to 200 days, any permanent system has to be emptied each fall. That favors designs with accessible low points and rules out anything that traps water.
Cool-season turf goes semi-dormant in heat. Lawns here are Kentucky bluegrass, ryegrass, and fescues, which rest during hot dry stretches. That is normal, and it means the goal is even coverage rather than maximum water.
Clay soil absorbs slowly. Systems need controllers capable of multiple start times so a zone can run in shorter passes with soak periods between them. A basic clock timer that only allows one start time per program is a poor fit here.
Hard water scales components. Limestone and dolomite bedrock across the Cumberland, Lebanon, and Lancaster valleys means calcium and magnesium build up in nozzle orifices and on valve diaphragms. Filtration matters more on drip than most people assume, and it matters most on well water.
What does not suit this region: any system marketed as freeze-proof, since none are, and any design that cannot be blown out. The annual rhythm of seasonal irrigation services is a condition of ownership here rather than an add-on.
Most Properties End Up With Two or Three Types
The realistic answer is a combination, not a single choice.
A typical well-designed residential property here runs:
- In-ground rotors on large open lawn areas
- Spray heads or rotary nozzles on smaller or awkward lawn sections, on their own zones
- Drip in planting beds and around shrubs, on its own zone with a filter and regulator
- One controller running all of it on separate programs
- One backflow assembly protecting everything
- A rain or freeze sensor interrupting the schedule when appropriate
Adding a type later is normal and usually cheaper than expected. Converting a bed zone from spray heads to drip reuses the existing valve, wire, and lateral, which makes it one of the better-value irrigation upgrades available on an older system.
Final Thoughts
Separate the three decisions and the choices get simple. Delivery method is set by what you are watering, so sprinklers for turf and drip for beds. Control method is set by how much you want to think about it, and weather-based control is where the water savings are. Water source is set by what your property has.
In-ground sprinklers remain the only practical way to water lawn evenly. Drip is the correct answer for beds and is frequently what an older system is missing. Soaker hose is a temporary tool rather than a system. Above-ground sprinklers are genuinely right for small flat lawns, and saying so is more useful than pretending otherwise.
The regional filter is short. It has to drain in the fall, it has to handle clay with multiple start times, and it has to cope with hard water.
If you are trying to decide what your property needs, ask for measured static pressure and available flow first. For lawn irrigation services in Central Pennsylvania, those two numbers determine which delivery methods are even possible before anyone discusses what would be nice to have.