Expert Guidance

When you decide to install a rainwater harvesting system, several questions require answers. Though rainwater harvesting systems are not complex and are easy to install, there are some perplexing pre-installation factors that need to be clarified. Comal County's Grainger & Sunn Rain Harvesting Consultants will help you understand the specifics involved in designing and installing your rainwater harvesting system.  Our services are offered to Comal and surrounding county residents without charge--courtesy of the Comal Trinity Groundwater Conservation District.

how do we



Designing a rainwater harvesting system is fairly simple. For most installations, the components and design are similar. The only change lies in its structuring, its measurements, and the use of materials for the components. Deciding these on your own may become a little complicated since it requires certain expert understanding and some calculations.  We'll help.

how can you



Complete as much of THIS FORM as you can and email it to; it helps us preplan your system design.  Alternatively, you may send us a consultation request via the form to the right.


You are welcome to visit and view our sample home installation sites or we will come to your site, without charge, to help you design your system.  We do not sell anything; our consulting is offered without charge to residents of Comal and surrounding counties as a public service to relieving stress on the Trinity aquifer. 

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Schedule a Free

Thanks for contacting us; we'll get back to you soon!

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"Our services are always free and we welcome questions anytime."

The true value of water is known only when the well runs dry.

"Thank you so much. You have given me a lot to absorb and great contacts. I appreciate your quick and knowledgeable response."

- Nita

Grainger & Sunn

Rain Harvesting Consultants

PO Box 428 

Bulverde, TX 78163


Steven - 903.452.0801

Larry - 210.286.8050