The Caleffi 535004 is a replacement internal cartridge for 5350 series AutoFill valves, renewing the pressure-reducing mechanism without unsoldering or removing the valve body from the line.
Product data compiled from Caleffi North America technical documentation. Last reviewed July 2026.
FunctionService Part
Fits5350 Series
Warranty2 Years
Key Features
Renews the Valve In Place
Replaces the internal pressure-reducing cartridge without removing the valve body from the piping.
Factory Internals
Genuine Caleffi cartridge with matched seals and spring for stable set-point holding.
Quick Service
Isolate, unscrew, swap and re-pressurize - typical service takes minutes.
Technical Data
| Function | Filling unit service part |
| Part | Internal pressure-reducing cartridge |
| Application | AutoFill 5350 series valves |
Documentation
Technical brochureRelated Products
- Caleffi NA10363 1/4 in Service Part
- Caleffi NA11338 3/4 in Service Part
- Caleffi NA10273 1/8 in Service Part
- Caleffi 535051A 3/4 in Auto Fill Valve
Frequently Asked Questions
What does the 535004 renew?
The internal pressure-reducing cartridge on 5350 series AutoFill valves.
Do I have to remove the valve to service it?
No. Isolate the line, unscrew the cartridge, install the replacement and re-pressurize - the valve body stays in the piping.
2-Year Limited Warranty. Backed by Caleffi North America's limited warranty against defects in material and workmanship for two years from date of shipment. See Caleffi's limited warranty for full terms.
- Type:
- Accessory
- Connection Size:
- 1/2 in
