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Irrigation cisterns
Irrigation cisterns require a continuous lining matched to agricultural water storage, immersion cycles, cistern geometry and maintenance access. This engineering guide frames the application intent without replacing the current system specification or product technical data sheet.
Use and application
The application intent is waterproofing of irrigation cisterns. Start by qualifying the substrate, exposure, service level and maintenance constraints. Rayston Epoxy Plus and Polyurea Rayston are typical reference products for this application. Compare the current Products and Systems documentation, and use the associated application context at Channels irrigation ditches to keep the scope distinct.
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Immersion service and cistern shell
Cisterns see fill and draw-down cycles, agricultural water chemistry and, where buried or partially buried, soil and groundwater on external faces. Concrete shells bring porosity, alkalinity and cracking risk. Wall–floor transitions, joints, inlets, outlets, manways, ladders and pipe penetrations need a continuous, documented detail before the lining route is fixed.
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Layers and references
Define the sequence from prepared substrate through primer or bond coat, functional membrane or body coat, reinforcement where specified, and protective or finish layer where required. Use the current technical data sheet for preparation, mixing, consumption, thickness, overcoat windows and cure; the Calculator supports quantities, while Systems and the product references establish the applicable route.
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Common mistakes
- Treating cistern immersion as a generic waterproofing job without checking water chemistry and wet–dry cycling.
- Omitting inlets, outlets, manways, wall–floor transitions and pipe penetrations from the lining detail.
- Closing the build-up before checking moisture, adhesion, thickness, pinholes and cure under immersion conditions.
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Operating sequence
1. Record water chemistry, fill and draw-down regime, cistern dimensions, substrate condition and service scenario. 2. Map joints, wall–floor transitions, inlets, outlets, manways, penetrations and repair zones. 3. Select a compatible route in Systems and verify every layer against the current technical data sheet. 4. Calculate quantities with the Calculator. 5. Approve a representative area, document preparation and application controls, inspect continuity and release the cistern only when the project requirements are met.