On a similar subject, I am about to embark on installing a system to supply irrigation over about 3 acres of homesite. The water source will be a well which is currently not connected to the house, but is drilled into the same water sand/strata that supplies the community. Since I do not want to ultimately contaminate the well and thereby cause potential for contaminating the entire community's water supply, I want to install some type of backflow preventer device. We live in Port Alto TX. Any suggestions or ideas about which type valve might be acceptable for this area. Like you all said, I may have to call the local gov offices/building inspectors to get the lowdown, but any input would be appreciated.
Many municipalities have a building permit / inspection office. They have all the info you should need. Home sprinkler systems here rquire a permit. They inspect to make sure you have a properly functioning backflow protector, and here they require it to have a yearly check by a certified tester. Jeff