The 43042 upper diaphragm plate is a replacement component used in AqMatic and AquaMatic 521 valve assemblies. This part replaces legacy part number 1075843 and is installed within the diaphragm assembly to support diaphragm positioning and assembly stability during valve operation.
Upper diaphragm plates are commonly replaced during valve rebuilds, preventative maintenance, and repair procedures involving worn or damaged diaphragm hardware. Proper diaphragm plate condition helps maintain reliable valve cycling and internal assembly alignment in filtration, water treatment, and industrial process systems.
This replacement component is used in compatible 521 valve configurations and may be installed alongside related diaphragms, shafts, springs, retainers, and rebuild hardware during scheduled servicing procedures.
The 43042 diaphragm plate is available through the AqMatic Parts & Accessories collection and supports maintenance of compatible K52 valve assemblies. Additional technical resources are available within the V42 documentation library.
$10.35
| SKU | Model Number | Part/Kit |
|---|---|---|
| 43042 | Diaphragm Plate, 521, Upper, Replaces part 1075843 |
| Weight | 1 lbs |
|---|---|
| Dimensions | 8 × 6 × 4 in |
