Nestled in the beautiful Lake Tahoe basin, Incline Village, Nevada, offers stunning alpine landscapes that require specialized care. As residents and property owners enjoy the unique beauty of this high-elevation community, maintaining the integrity and safety of your water systems is paramount. At Lake Scaping LLC, we specialize in irrigation system services tailored to the specific needs of Incline Village and Crystal Bay properties, including expert backflow prevention and testing services.
Backflow prevention is critical for protecting the potable water supply from potential contamination. In the unique environment of Incline Village, this becomes even more important due to the properties' proximity to natural water sources, including the pristine waters of Lake Tahoe. Our backflow prevention services are designed to safeguard your water system against this risk, ensuring that your irrigation water never contaminates your drinking water supply.
Our comprehensive backflow testing services include:
Backflow — the reversal of flow in an irrigation or plumbing system that allows potentially contaminated water to flow backward into the potable water supply — is a serious public health concern that Nevada water codes take seriously. In Incline Village, IVGID (Incline Village General Improvement District) requires annual testing of all backflow prevention assemblies connected to the potable water supply, including irrigation systems, pool fill lines, and other non-potable water uses.
The risk at Lake Tahoe properties is not hypothetical. Irrigation water at a Tahoe property may contain fertilizer residue, pesticide residue, pet waste contamination, and other contaminants introduced into the soil through normal irrigation and landscape maintenance activities. Without a properly functioning backflow preventer, a pressure drop in the water main creates the conditions for backflow — potentially drawing irrigation water contamination back into the potable water supply that serves your property and your neighbors.
RPZ assemblies provide the highest level of backflow protection and are required for high-hazard connections — irrigation systems where fertilizer injectors or pesticide injection systems are connected, properties with pools or spas, and commercial applications. An RPZ assembly contains two check valves and a differential pressure relief valve that discharges to atmosphere if the check valves fail, ensuring that contaminated water cannot flow back into the potable supply even under failure conditions.
RPZ assemblies must be installed above grade in a location accessible for testing. At Incline Village, freeze protection of the assembly is essential — RPZ assemblies are typically installed in insulated enclosures or inside garages with appropriate connections to the exterior irrigation system.
PVB assemblies are appropriate for moderate-hazard connections — residential irrigation systems without chemical injection. A PVB contains a check valve and an air inlet valve that opens when the system pressure drops, breaking the siphon that could cause backflow. PVB assemblies must be installed at least 12 inches above the highest irrigation head in the system.
PVBs are not appropriate for installations where the assembly could be submerged or where chemical injection is used. At Incline Village, PVBs installed on properties with sloped yards where irrigation heads exist above the assembly elevation need to be evaluated for conversion to RPZ assemblies.
DCV assemblies are appropriate for low-hazard connections — residential irrigation systems with no chemical injection where the risk of backflow contamination is limited. DCVs may be installed below grade in vaults, making them suitable for locations where above-grade installation is not practical. DCVs require annual testing and, at Incline Village, winterization to prevent freeze damage.
IVGID requires annual testing of all backflow prevention assemblies by a certified backflow prevention assembly tester (BPAT). Testing must be performed using calibrated test equipment and the results documented on IVGID's required test form, which is submitted to the district after each test cycle. Properties that fail to have assemblies tested or that have assemblies that fail testing face compliance notices and potential water service interruption.
Lakescaping LLC holds current Nevada backflow prevention assembly tester certification. We perform annual backflow testing for residential and commercial properties throughout Incline Village, Crystal Bay, Glenbrook, and Zephyr Cove, submitting test results directly to IVGID on behalf of the property owner.
Backflow prevention assemblies that fail the annual test require repair or replacement before the irrigation system can be used. Common failure modes include:
Failed check valves: Check valves that do not fully seat — commonly caused by debris, mineral scale, or worn valve seats — allow water to flow backward through the assembly. Repair involves cleaning or replacing the check valve internals, or replacement of the assembly if the body is corroded.
Failed relief valve (RPZ): An RPZ relief valve that discharges continuously indicates that the differential pressure between the zones is insufficient. Repair involves replacing the relief valve seat and disc or the full assembly.
Freeze damage: Assemblies that were not properly winterized may have cracked body sections, cracked internal components, or failed seals from ice expansion. Freeze-damaged assemblies typically require full replacement. This is the most common backflow assembly failure mode at Incline Village properties where winterization was missed or inadequate.
Lakescaping LLC (Nevada C-10 #0086320) has served property owners in Incline Village, Crystal Bay, Glenbrook, and Zephyr Cove for 33+ years. Contact us for a no-obligation on-site consultation to assess your property's specific needs.
Serving Nevada properties only — Incline Village, Crystal Bay, Glenbrook, and Zephyr Cove.
Yes. IVGID requires annual testing of all backflow prevention assemblies connected to the potable water supply, including residential irrigation systems. Testing must be performed by a certified backflow prevention assembly tester (BPAT) using calibrated equipment, and results must be submitted to IVGID on the required test form. Properties that fail to comply face notices and potential water service interruption.
A failed backflow preventer must be repaired or replaced before the irrigation system can be returned to service. The failed assembly must be retested after repair or replacement to confirm compliance before IVGID closes out the compliance record. We perform same-day or next-day repair service for assemblies that fail during annual testing to minimize irrigation service interruption.
Backflow preventers at Incline Village must be winterized as part of irrigation system winterization — typically mid-September to early October. For above-grade RPZ and PVB assemblies, the winterization process involves draining and blowing out the irrigation system, then shutting off the supply valve to the assembly and draining any water from the assembly body. Insulated foam covers provide supplemental protection for assemblies that are not in fully protected locations. We include backflow assembly winterization in all our irrigation winterization services.
Backflow preventer installation on the service line connecting to IVGID water supply requires a licensed Nevada contractor (C-1 plumbing or C-10 landscape contracting) and IVGID review. DIY installation on the service line is not permitted. Installation of secondary backflow preventers within the irrigation system may be performed by the property owner but must use assemblies that meet IVGID standards. We recommend using licensed contractors for all backflow installation to ensure compliance.
Replacement cost depends on assembly type and size. A standard residential PVB or DCV assembly (3/4-inch or 1-inch) typically costs $250–$500 for parts and installation. An RPZ assembly of the same size costs $400–$700. Larger commercial-size assemblies cost proportionally more. Emergency service or same-day replacement after a failed test may carry a service premium. We provide itemized estimates before any replacement work begins.
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