{"id":720,"date":"2026-01-29T18:51:47","date_gmt":"2026-01-29T18:51:47","guid":{"rendered":"https:\/\/gaeatech.com\/wordpress\/?p=720"},"modified":"2026-03-28T03:17:43","modified_gmt":"2026-03-28T03:17:43","slug":"monitoring-well-screen-riser-material","status":"publish","type":"post","link":"https:\/\/gaeatech.com\/knowledge-center\/monitoring-well-screen-riser-material\/","title":{"rendered":"Choosing the Best Screen and Riser Pipe Materials for Monitoring Wells"},"content":{"rendered":"\n<p>In environmental monitoring, the integrity of your data depends on the &#8220;inertness&#8221; of your well materials. Screen and riser pipes serve as the structural skeleton of a monitoring well, and their chemical compatibility with local groundwater is paramount. Selecting the right materials ensures that your samples are representative of the actual subsurface conditions rather than a byproduct of the well\u2019s construction.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-1-riser-pipe-amp-screen-materials-pvc-vs-stainless-steel\"><strong>1. Riser Pipe &amp; Screen Materials: PVC vs. Stainless Steel<\/strong><\/h4>\n\n\n\n<p>The choice between thermoplastic and metallic materials typically depends on depth and the presence of specific contaminants.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>PVC (Polyvinyl Chloride):<\/strong>&nbsp;The industry standard for most sites due to its low cost and resistance to typical groundwater corrosion.\n<ul class=\"wp-block-list\">\n<li><strong>Pros:<\/strong>&nbsp;Lightweight and widely available in&nbsp;<strong>Schedule 40 or 80<\/strong>&nbsp;wall thicknesses.<\/li>\n\n\n\n<li><strong>Cons:<\/strong>&nbsp;PVC can be degraded (softened or melted) by certain solvents like&nbsp;<strong>pure-phase xylenes or ketones<\/strong>.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Stainless Steel (304 or 316):<\/strong>&nbsp;Preferred for high-stakes municipal wells or sites with extreme organic contamination.\n<ul class=\"wp-block-list\">\n<li><strong>Pros:<\/strong>&nbsp;High tensile and collapse strength, making it ideal for deep installations where PVC might buckle.<\/li>\n\n\n\n<li><strong>Cons:<\/strong>&nbsp;Significantly more expensive and can be prone to corrosion in highly acidic (low pH) environments.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Fluoropolymers (e.g., PTFE\/Teflon):<\/strong>&nbsp;Highly inert but rarely used as primary riser material due to high cost and low structural strength.<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-2-slot-size-and-screen-selection\"><strong>2. Slot Size and Screen Selection<\/strong><\/h4>\n\n\n\n<p>The screen is a filter that allows water in while keeping sediment out.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Matching Slot to Filter Pack:<\/strong>&nbsp;The slot size must be chosen based on the grain-size distribution of the&nbsp;<strong>filter pack sand<\/strong>. A common rule is that the screen should retain at least&nbsp;<strong>90% of the filter pack<\/strong>.<\/li>\n\n\n\n<li><strong>Common Dimensions:<\/strong>&nbsp;Most monitoring wells use&nbsp;<strong>0.010-inch<\/strong>&nbsp;(#10 slot) or&nbsp;<strong>0.020-inch<\/strong>&nbsp;(#20 slot) machine-slotted screens.<\/li>\n\n\n\n<li><strong>Lithology Impact:<\/strong>&nbsp;Finer geologic formations (silt or clay) require smaller slot widths to prevent turbidity during sampling.<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-3-critical-connection-details\"><strong>3. Critical Connection Details<\/strong><\/h4>\n\n\n\n<p>How you join your pipes matters as much as the pipe itself.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Threaded Flush Joints:<\/strong>&nbsp;Always use&nbsp;<strong>threaded joints<\/strong>&nbsp;with O-rings or Teflon tape to ensure a watertight seal.<\/li>\n\n\n\n<li><strong>Avoid Solvent Glues:<\/strong>&nbsp;Never use PVC glue or primers. These &#8220;welding&#8221; chemicals can leach&nbsp;<strong>volatile organic compounds (VOCs)<\/strong>&nbsp;into your well, permanently compromising your water quality data.<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-summary-table-material-comparison\"><strong>Summary Table: Material Comparison<\/strong><\/h4>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th class=\"has-text-align-left\" data-align=\"left\">Feature<\/th><th class=\"has-text-align-left\" data-align=\"left\">PVC (Sch. 40\/80)<\/th><th class=\"has-text-align-left\" data-align=\"left\">Stainless Steel (304\/316)<\/th><\/tr><tr><td><strong>Corrosion Resistance<\/strong><\/td><td>Excellent (most environments)<\/td><td>High (except low pH)<\/td><\/tr><tr><td><strong>Chemical Inertness<\/strong><\/td><td>Good (susceptible to solvents)<\/td><td>Superior (highly inert)<\/td><\/tr><tr><td><strong>Strength<\/strong><\/td><td>Moderate<\/td><td>Very High<\/td><\/tr><tr><td><strong>Cost<\/strong><\/td><td>Low<\/td><td>High<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-a89b3969 wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-text-color has-background has-link-color wp-element-button\" href=\"https:\/\/www.gaeatech.com\/winlog.php\" style=\"color:#fef2f2;background-color:#5e87be\">Learn more about our Boring and Well Log Solutions<\/a><\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-related-articles\">Related Articles<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/the-complete-guide-to-drilling-and-sampling-for-environmental-and-geotechnical-investigations\/\">The Complete Guide to Drilling and Sampling for Environmental and Geotechnical Investigations<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/health-safety-plan-hasp-investigations\/\">Crafting an Effective Health &amp; Safety Plan (HASP)<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/emergency-response-plan-drilling\/\">Crafting an Effective Emergency Response Plan for Environmental and Geotechnical Drilling<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/job-site-safety-checklist-geotechnical-drilling\/\">Essential Job-Site Safety Checklist for Geotechnical and Environmental Drilling<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/essential-steps-safe-drilling-urban-areas\/\">Essential Steps to Ensure Safe Drilling: Utility Clearances Before Boring Operations<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/urban-borehole-drilling-hazards\/\">Hazards to Consider Before Drilling Boreholes in Urban Areas<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/sampling-and-analysis-plan-comprehensive-guide\/\">Creating A Comprehensive Environmental Sampling And Analysis Plan: Your Guide To Success<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/conceptual-site-models-guide\/\">Mastering Conceptual Site Models: A Step-by-Step Guide to Understanding Contaminants<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/mastering-contaminants-of-concern-environmental-drilling\/\">Mastering Contaminants of Concern: Identification and Delineation<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/sampling-frequency-environmental-investigations\/\">Sampling Frequency: The Key to Effective Environmental Investigations<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/qa-qc-plans-environmental-investigations\/\">The Critical Role of QA and QC Plans in Environmental 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Readings<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/mastering-standard-penetration-testing-methods\/\">Standard Penetration Testing: A Comprehensive Guide<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/calibrating-photoionization-detectors\/\">The Comprehensive Guide to Calibrating a Photoionization Detector (PID)<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/classifying-soils-during-drilling\/\">Classifying Soils During Drilling: Your Comprehensive Guide<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/monitoring-well-design-environmental-investigations\/\">Designing a Monitoring Well for Environmental and Geotechnical Investigations<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/types-of-monitoring-well-protective-casings\/\">Types of Protective Casings used for Monitoring Wells<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/selecting-monitoring-well-filter-grout-materials\/\">Choosing the Best Filter and Grout Materials for a Monitoring Well<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/gaeatech.com\/knowledge-center\/groundwater-monitoring-well-purging-sampling-procedures\/\">Standard Operating Procedures for Purging and Sampling Groundwater Monitoring Wells<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>In environmental monitoring, the integrity of your data depends on the &#8220;inertness&#8221; of your well materials. Screen and riser pipes serve as the structural skeleton of a monitoring well, and their chemical compatibility with local groundwater is paramount. Selecting the right materials ensures that your samples are representative of the actual subsurface conditions rather than [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":721,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[792,256],"tags":[377,374,376,378,375],"class_list":["post-720","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-borehole-data-management","category-drilling-and-sampling","tag-groundwater-monitoring-well-design","tag-monitoring-well-construction-materials","tag-pvc-vs-stainless-steel-well-casing","tag-riser-pipe-materials","tag-well-screen-slot-size-selection"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.4 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Selecting Monitoring Well Screen &amp; Riser Materials Explained - Knowledge Center<\/title>\n<meta name=\"description\" content=\"Explore the essentials of selecting monitoring well screen and riser materials to ensure accurate environmental data collection.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/gaeatech.com\/knowledge-center\/monitoring-well-screen-riser-material\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Choosing the Best Screen and Riser Pipe Materials for Monitoring Wells\" \/>\n<meta property=\"og:description\" content=\"Explore the essentials of selecting monitoring well screen and riser materials to ensure accurate environmental data collection.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/gaeatech.com\/knowledge-center\/monitoring-well-screen-riser-material\/\" \/>\n<meta property=\"og:site_name\" content=\"Knowledge Center\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.linkedin.com\/company\/2663277\/\" \/>\n<meta property=\"article:published_time\" content=\"2026-01-29T18:51:47+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-03-28T03:17:43+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/gaeatech.com\/knowledge-center\/wp-content\/uploads\/2026\/01\/PrepakFlyer7-12-21NoPricesWt-640w.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"395\" \/>\n\t<meta property=\"og:image:height\" content=\"281\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"author\" content=\"GAEA Technologies\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"GAEA Technologies\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/monitoring-well-screen-riser-material\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/monitoring-well-screen-riser-material\\\/\"},\"author\":{\"name\":\"GAEA Technologies\",\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/#\\\/schema\\\/person\\\/940fb5fed6e95dd9d0ec1370207f5dba\"},\"headline\":\"Choosing the Best Screen and Riser Pipe Materials for Monitoring Wells\",\"datePublished\":\"2026-01-29T18:51:47+00:00\",\"dateModified\":\"2026-03-28T03:17:43+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/monitoring-well-screen-riser-material\\\/\"},\"wordCount\":691,\"commentCount\":6,\"publisher\":{\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/monitoring-well-screen-riser-material\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/wp-content\\\/uploads\\\/2026\\\/01\\\/PrepakFlyer7-12-21NoPricesWt-640w.webp\",\"keywords\":[\"groundwater monitoring well design\",\"monitoring well construction materials\",\"PVC vs stainless steel well casing\",\"riser pipe materials.\",\"well screen slot size selection\"],\"articleSection\":[\"Borehole Data Management\",\"Drilling and Sampling\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/monitoring-well-screen-riser-material\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/monitoring-well-screen-riser-material\\\/\",\"url\":\"https:\\\/\\\/gaeatech.com\\\/knowledge-center\\\/monitoring-well-screen-riser-material\\\/\",\"name\":\"Selecting Monitoring Well Screen & Riser Materials Explained - 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