Resources: Pretreatment Guides and Wash Water Rules

Guides for powder coaters and fabricators

Practical guides from CPR Systems on metal pretreatment and wash water: how 3, 5 and 7-stage washers work, iron phosphate vs. zirconium, bath maintenance, fixing adhesion problems, and the pretreatment discharge rules powder coaters face in Texas, South Carolina, North Carolina, Pennsylvania, California and Colorado.

Regions

Powder Coating Wash Water Recycling in Dallas-Fort Worth

Powder Coating Wash Water Recycling in Spartanburg and the Upstate

How a Dallas-Area Fabricator Is Replacing Solvent Wiping With a Closed-Loop Wash

State rules

Powder Coating Wash Water Disposal: EPA Rules and Compliance Options

Texas: TCEQ Pretreatment Rules

South Carolina: Pretreatment Permit Rules

North Carolina: Pretreatment and PFAS Rules

Pennsylvania: Pretreatment Rules and EPA Oversight

California: Pretreatment and Hazardous Waste Rules

Colorado: Zirconium Pretreatment Wastewater Permits

How-to guides

Pretreatment Washers: 3, 5 & 7-Stage Systems Explained

Iron Phosphate vs. Zirconium Pretreatment

Converting an Iron Phosphate Washer to Zirconium

Phosphate-Free Pretreatment: How Zirconium Works

Powder Coating Adhesion Problems? Start With Your Pretreatment

Pretreatment Bath Maintenance: Titration, Rinse Quality and Dump Schedules

Wash Water Hauling vs. Closed-Loop Recycling: ROI

Pretreatment for Caterpillar Suppliers

Pretreatment for Applied Materials Suppliers

Pretreatment for Transformer and Switchgear Enclosures

What Is Phosphating? Iron Phosphate Conversion Coating for Powder Coating

Phosphating is a conversion coating: acid phosphate reacts with clean steel to form a thin layer that helps powder grip. How iron phosphate compares with zinc phosphate and zirconium.

4 days ago4 min read

Planning a 2027 Pretreatment Line: Permit, Budget and Build-Slot Checklist

Planning a pretreatment line for 2027? Settle the spec, permit, budget and build slot in this order. A step-by-step checklist for powder coaters.

4 days ago4 min read

PFAS and Powder Coating Wash Water: What EPA's 2027 Proposal Means

EPA expects a PFAS proposal for metal finishing in Feb 2027. What it means for iron phosphate and zirconium pretreatment lines, and what to do now.

4 days ago4 min read

Rinse and Seal After Iron Phosphate: What Each Step Does and When You Need It

A rinse removes leftover phosphate chemistry; a seal reacts and fills the coating before powder. What each step does and when your spec calls for it.

7 days ago2 min read

Evaporator vs Closed-Loop Recycling for Pretreatment Wash Water

Evaporators shrink pretreatment wash water but use energy and leave a concentrate to manage. Here's how they compare with closed-loop recycling.

Oct 282 min read

Spray Wand Pretreatment Systems Compared: What to Check Before You Buy

Spray wand pretreatment systems look alike on paper. Compare who supplies the chemistry, whether a rinse is required, where the water goes and which specs each meets.

Oct 285 min read

Powder Coating Pretreatment in Austin and Central Texas

Running a powder line in Austin, Taylor or the San Antonio corridor? Here is who regulates your wash water and how a closed-loop pretreatment line keeps it out of the sewer.

Oct 283 min read

Building Your Own Wash Water Filtration vs. a Closed-Loop Pretreatment System

Building your own wash water filtration for metal pretreatment? Compare chemistry control, permits and support with a closed-loop system first.

Oct 274 min read

Repair the Old Washer or Replace It? A Pretreatment Decision Guide

Repair the old pretreatment washer or replace it? See what wears out, when a repair only defers the decision, and how to compare the real costs.

Oct 274 min read

Pretreatment for Applied Materials Suppliers: Audit-Ready Single Step Clean and Coat

Applied Materials suppliers: how to set up an audit-ready, single step zirconium or iron phosphate clean and coat line with no process discharge in Austin or Silicon Valley.

Oct 214 min read

Converting an Iron Phosphate Washer to Zirconium: What Changes

Most iron phosphate washers can be converted to zirconium, but it is not a drop-in swap. Here is what changes in the washer, the water and the daily routine, and a checklist to plan the changeover.

Oct 204 min read

Pretreatment for Transformer and Switchgear Enclosures: What Fabricators Need to Know

Transformer and switchgear enclosures have to pass the utility's coating spec, so pretreatment is where the job is won or lost. Here is how fabricators in Upstate SC and Dallas-Fort Worth choose a process.

Oct 204 min read

Phosphate-Free Pretreatment for Powder Coating: How Zirconium Works and When It Fits

Phosphate-free pretreatment replaces iron phosphate with a thin zirconium conversion coating. Here is how the two compare, when phosphate-free fits your line, and when an OEM spec still calls for a phosphate wash, rinse and seal.

Oct 204 min read

How a Dallas-Area Fabricator Is Replacing Solvent Wiping With a Closed-Loop Wash

A Dallas-area metal fabricator was spending over $150,000 a year on thinner and keeping five people on parts wiping. Its new CPR closed-loop wash is built for both CAT 1E4093 levels and is expected to cut prep to one operator and under $5,000 in chemistry.

Oct 203 min read

Powder Coating Wash Water Recycling in Spartanburg and the Upstate

How Spartanburg and Upstate SC powder coaters handle pretreatment wash water: Spartanburg Water permits, SCDES and closed-loop recycling.

Oct 165 min read

Pretreatment for Caterpillar Suppliers: Phosphate Wash, Rinse and Seal

What Caterpillar suppliers need from pretreatment: iron phosphate clean and coat to two CAT 1E4093 levels, rinse and seal, and closed-loop recycling.

Oct 163 min read

Powder Coating Wash Water Recycling in Dallas-Fort Worth

Closed-loop, zero-discharge pretreatment for Dallas-Fort Worth powder coaters and metal fabricators. Stop hauling your wash water and recycle it.

Oct 134 min read

Iron Phosphate vs. Zirconium Pretreatment: Which Is Right for Your Powder Coating Line?

Iron phosphate or zirconium? Compare heat, sludge, rinse needs and wash water impact to pick the right pretreatment for your powder coating line.

Oct 134 min read

Powder Coating Adhesion Problems? Start With Your Pretreatment

Peeling or flaking powder coat? Learn how cleaning, rinse quality and conversion coating cause adhesion failures and how to fix them.

Oct 94 min read

Pretreatment Bath Maintenance: Titration, Rinse Quality and Dump Schedules

Keep washer stages in spec with practical titration, rinse conductivity, sludge removal and dump-schedule tips for powder coaters.

Oct 54 min read

Wash Water Hauling vs. Closed-Loop Recycling: How to Calculate Your ROI

Compare the true cost of hauling wash water with a closed-loop recycling system. Learn what to measure and how to calculate payback for your shop.

Oct 24 min read

Powder Coating Wash Water Disposal in Pennsylvania: Pretreatment Rules and EPA Oversight

How Pennsylvania powder coaters handle pretreatment wash water: EPA Region 3 oversight, local sewer permits, hauling and zero-discharge options.

Sep 283 min read

Powder Coating Wash Water Disposal in South Carolina: Pretreatment Permit Rules

How South Carolina powder coaters handle pretreatment wash water: SCDES and local sewer permits, limits, hauling and zero-discharge options.

Sep 283 min read

Powder Coating Wash Water Disposal in California: Pretreatment and Hazardous Waste Rules

How California powder coaters handle pretreatment wash water: local sewer permits and limits, DTSC hazardous waste rules and zero-discharge options.

Sep 283 min read