Frequently Asked Questions

Automatic Sprinklers

  • Will an automatic sprinkler system use more water that what I currently use?

    No. Actually, a well designed irrigation system will apply exactly the amount of water your landscape needs.  No more worries about turning off the faucet. Our system has a controller that allows the system to be set at different watering times, depending on the season or needs of the landscape. 


    We also include a rain sensor with each system to avoid watering after sufficient rainfall. 

  • Do you install systems on well water?

    Yes. Being in Southern Maryland means over half the systems we install and service are on well water. 

  • Are you licensed and insured?

    Absolutely! The State of Maryland requires that any contractor that works on your property be properly licensed and insured. Our Maryland Home Improvement Number listed under C.R. Harrigan Inc. is #47060.


    Our certificate of liability insurance is supplied with each quote, or upon your request. 

  • Should I winterize my sprinkler system?

    To prevent pipes from bursting and sprinkler heads breaking, you should winterize your sprinkler system. Get more information.

Landscape Lighting

  • Will adding landscape lighting increase my utility bill?

    Installing a low voltage lighting system may slightly increase a utility bill. A typical low voltage landscape lighting system only draws 300 to 600 watts of power.


  • Will landscape lighting improve my home's value?

    Adding lighting to your landscape will increase your home's curb appeal and possibly increase Your home's value. But more than that, landscape lighting adds safety when walking around your property at night and deters intruders. It also makes your home look fantastic ... it shows off your home's architecture and  features such as patios, gazebos, ponds, pools, and walkways. 

  • Do LED lights give off radiant heat?

    No. LED Lights give off 90% less heat than the standard halogen light. In fact, LED Lights are continuinng to become more efficient by enabling more light output per unit of energy. And through further development, LEDs will emit even less heat over time.



Sprinkler System Service 

  • What manufacturers do you service?

    We install our systems using Hunter, Rain Bird and Irritrol products. However our service technicians are trained to work on all manufactuers parts. 

  • What areas do you service?

    We service Calvert, St. Mary's, Charles, Prince Georges, Anne Arundel, Queen Anne, Kent and in Virginia we service King George and portions of Alexandria.


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