Water pressure problems are among the most common complaints sprinkler system clients bring to their service company, and they manifest in ways that make accurate diagnosis essential. Too much pressure damages heads and creates misting that wastes water; too little pressure leaves coverage gaps and under-irrigated turf. Systematic pressure diagnosis resolves these problems definitively rather than treating symptoms.
If you're exploring how to build a stronger sprinkler system operation, our guide on Converting Spray Zones to Drip Irrigation: A Service Opportunity for Sprinkler Companies covers the foundational concepts you'll want in place first.
Measuring Static and Dynamic Pressure at the System
Accurate pressure diagnosis requires measuring both static pressure at the main connection point and dynamic pressure at the zone valve when the zone is running. The difference between static and dynamic pressure reveals losses through the backflow preventer, main line, and zone valve that may be narrowing the pressure available at the heads. A pressure gauge at the zone valve while the zone runs identifies whether the problem is upstream or downstream of the valve and focuses the diagnostic work on the right section of the system.
Solving High-Pressure Problems Without Full System Redesign
High static pressure that causes misting and head damage can often be resolved with pressure-regulating heads that replace existing standard heads without any pipe work. Zone-level pressure regulators installed at the valve manifold address high pressure for an entire zone without touching individual heads. Both solutions are far less expensive than a full system retrofit and can be proposed and priced during the diagnostic visit, allowing the client to approve and complete the solution in the same appointment for most property sizes.
Addressing Low-Pressure Problems Systematically
Low pressure that affects coverage has multiple potential causes including a partially closed main shut-off, a failing zone valve, undersized lateral pipe for the head count in the zone, or a head count that exceeds the available flow rate. Running the zone with heads progressively capped off isolates whether the problem is flow-based or pressure-based, which points to different solutions. Documenting the measured pressure values before and after any corrective work in your software creates a baseline for verifying that the repair achieved the expected result and provides context for any future pressure complaints on the same system.
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