The MixRite Check Valve 1" (Part #36000000258) is an OEM replacement check valve kit designed specifically for MixRite TF3 Series fertilizer injectors. It is compatible with MixRite models IMR2SO (571CW), IMR4SO (573CW), and IMR1 (566AG), which correspond to the TF3.002ON/OFF and TF3.004ON/OFF configurations with a 1" NPT body. The check valve is a critical internal component that prevents back-siphoning of fertilizer or chemicals into your water supply and ensures accurate, consistent dosing with each irrigation cycle. Replacing a worn or damaged check valve restores your injector's precision and extends the life of your entire fertigation system. For optimal system performance, pair your MixRite injector with a quality inline filter and backflow preventer.
| Specification | Details |
|---|---|
| Part Number | 36000000258 |
| SKU | IMRCHECK |
| Compatible MixRite Models | IMR2SO (571CW), IMR4SO (573CW), IMR1 (566AG) |
| TF Series Designation | TF3.002ON/OFF, TF3.004ON/OFF |
| Injector Body Thread Size | 1" NPT |
| Brand | MixRite / DEMA Engineering |
Which MixRite injector models does this check valve fit?
This check valve kit (Part #36000000258) fits MixRite models IMR2SO (571CW), IMR4SO (573CW), and IMR1 (566AG) — the TF3 series injectors with a 1" NPT body.
How do I know if my check valve needs replacing?
Signs of a failing check valve include inconsistent fertilizer dosing, backflow of chemicals, or visible wear and cracking on the valve components. Replacing the check valve promptly restores accurate metering and protects your water supply.
Where can I find other MixRite replacement parts?
DripWorks carries a full selection of MixRite injectors and accessories. Browse the complete MixRite category to find injectors, parts, and compatible fertigation components.
Sep 3rd 2026
Sep 2nd 2026
Sep 1st 2026
Aug 31st 2026
