Before installing irrigation, ask about your water source and pressure, and whether the system needs backflow prevention and a permit. Ask how the zones will be designed for your soil and slope, and whether you want smart controls. Also ask what the system will cost to run, and how your yard will be restored and winterized. These questions shape how well the system works and what it costs over time. Getting clear answers before the first shovel goes in the ground saves money and prevents surprises. This guide walks through each question and explains why it matters for a Central Pennsylvania yard. It also shows what a good answer looks like, so you can plan with confidence.
Vetting the company itself, its registration, insurance, and references, is its own step. This article focuses on the questions specific to the irrigation system and your property.
What Is My Water Source and Is the Pressure Enough
Start here, because everything else depends on it. A system can only deliver the water your source can supply.
Before designing anything, a good installer measures two things. The first is your static water pressure, in pounds per square inch. The second is your available flow, in gallons per minute. Together these set how many heads a zone can run and how the whole system is laid out.
Your source shapes the answer. Most homes here run on municipal water, where pressure is usually steady. Homes on a private well have an extra step, since the well’s output, pump, and any storage tank set the ceiling. Ask whether your source can support the yard you want to water, and what the installer measured to know.
| Factor | Municipal Water | Private Well |
|---|---|---|
| Pressure | Usually steady from the main | Depends on the pump and tank |
| Flow limit | Set by the service line size | Set by the well’s output |
| Extra needs | Backflow device and possible permit | May need pump or storage sizing |
| First step | Measure pressure and flow | Test well output before design |
Will the System Need Backflow Prevention
The answer on municipal water is almost always yes, and this is a safety question, not just a code one.
An irrigation system links your drinking water to the outdoors, which plumbers call a cross-connection. Without protection, water sitting in the pipes, along with any fertilizer or soil contact, could be drawn back into your home’s drinking water. To stop that, plumbing codes require a backflow prevention device on the connection. Pennsylvania’s construction code follows the International Plumbing Code, which calls for an approved backflow preventer on any irrigation tie-in to a drinking water supply.
There is a follow-up question too. These devices are testable, and many local water authorities require the assembly to be tested every year by a certified tester. Ask who installs the device, whether it meets local rules, and who handles the yearly testing.
Do I Need a Permit or a Separate Water Meter
Two paperwork questions can save you money and trouble.
First, ask about permits. Many municipalities require a plumbing permit for the water connection and the backflow device. A professional installer usually handles this, so confirm that it is included rather than left to you.
Second, ask your water authority about a separate irrigation meter, sometimes called a deduct meter. Irrigation water soaks into the ground instead of returning to the sewer. A separate meter can keep you from paying sewer charges on the water your lawn uses. Availability and rules vary by district, so it is worth a call before you install. Over a long watering season, the savings can be real.
How Will the Zones Be Designed for My Yard
Zone design decides whether every part of the yard gets the right amount of water. It is the heart of a good system.
Ask how the installer plans to group your yard into zones. Turf, shaded beds, sunny borders, and slopes all have different needs, so they belong on separate zones. Good design also matches the head type to the area. Spray heads suit small lawns, rotor heads suit large areas and slopes, and drip lines suit beds and trees. This is where a thoughtful irrigation system installation earns its value, since the layout is built around your actual soil, sun, and grade.
Central PA has plenty of clay soil and rolling ground. Ask how the design handles runoff on slopes, since water applied too fast runs off before it soaks in.
Do I Want Smart Controls
The controller decides when and how much the system waters, so it is worth an early decision.
A basic timer runs on a fixed schedule. A smart controller adjusts on its own. Ask about the two main types the EPA recognizes through its WaterSense program. Weather-based controllers adjust to local weather, and soil moisture controllers water only when the ground is dry. Either one cuts waste and saves you from managing the schedule. Adding a smart controller at install time is cheaper than retrofitting one later.
What Will the System Cost to Run
The install price is only part of the cost. Ask what the system will cost to operate each year.
Water is the main running cost, and an efficient design keeps it in check. Ask how the installer sizes watering to your yard’s real needs rather than a guess, and what features reduce waste. A well-planned system with pressure-regulated heads and a smart controller uses far less water than a basic setup. Knowing the yearly cost up front helps you compare a cheaper install that wastes water against an efficient one that costs less to run.
How Will My Yard Be Restored After Installation
Installing a system means trenching across your yard, so ask what your lawn will look like when the crew leaves.
A good installer uses methods that limit damage and restores the lawn and beds afterward. Ask who repairs the trenched areas, how long the yard takes to recover, and whether cleanup is included. Also ask how long the install itself takes, so you can plan around it. Clear answers here prevent the most common post-install surprise.
How Will the System Be Winterized and Maintained
A system is a long-term investment, so ask how it stays healthy year after year.
Central Pennsylvania freezes will crack pipes and heads if water is left in the lines over winter. Ask whether fall winterization and spring startup are offered, and whether a maintenance plan is available. Ongoing seasonal maintenance keeps the system efficient and catches small problems early. Ask about the warranty too, both on the labor and on the parts like the controller, valves, and heads.
A Quick Checklist of Questions
Bring these to your consultation:
- What are my static water pressure and available flow, and how were they measured?
- Does my system need a backflow preventer, and who handles the yearly testing?
- Is a permit required, and can I get a separate irrigation meter to avoid sewer charges?
- How will you group my yard into zones for its soil, sun, and slope?
- What head types will you use, and how will you handle runoff on slopes?
- Do you offer a smart controller, and which type fits my yard?
- What will the system cost to run each year?
- Who restores the lawn after trenching, and how long will it take?
- Are winterization, spring startup, and a maintenance plan available?
- What warranty covers the labor and the parts?
Key Pre-Install Questions and Why They Matter
Here is the short version of what each question protects.
| Question Topic | Why It Matters |
|---|---|
| Water pressure and flow | Sets the limit for the whole design |
| Backflow prevention | Protects your drinking water and meets code |
| Permit and meter | Keeps you legal and can cut sewer charges |
| Zone design | Gives every area the right amount of water |
| Smart controls | Cuts waste and running cost |
| Yard restoration | Prevents a torn-up lawn surprise |
| Winterizing and warranty | Protects the system for the long term |
Final Thoughts
Installing irrigation goes smoothly when you ask the right questions first. Confirm your water source, pressure, and flow, sort out backflow prevention and any permit, and understand how the zones will be designed for your soil and slope. Decide on smart controls, learn the yearly running cost, and get clear answers on yard restoration, winterizing, and warranty. Good answers to these questions are the sign of a system built to last.
If you are planning a system for your yard, Evergreen Contracting & Irrigation can help. The team designs and installs irrigation systems built for Central Pennsylvania homes, and answers every one of these questions up front. Reach out to request a free estimate and start your project on the right foot.