| Materials (Body) | Cartridge made of engineered plastics, with enclosed |
| Application | CA100A cartridges can be removed and replaced using a standard 19 mm socket or the MT100C cartridge changer. Use of the 19 mm socket requires shut off and drain down of the system. |
| Used With | V100 Series 1/2 in. and 3/4 in. size, old style only |
Description
Replacement cartridge for old-style V100 thermostatic radiator valve bodies from Resideo (Honeywell Home), part number CA100A116.
A thermostatic radiator valve that will not close, or that closes and never reopens, has usually lost the cartridge rather than the head. The cartridge carries the seat and the plug; the head only pushes on it.
Rebuilding from the cartridge keeps the valve body in the radiator connection. On an old cast-iron system where the union has been painted over three times, that is the difference between a service call and a plumbing job.
- Brand: Resideo (Honeywell Home)
- Manufacturer Part #: CA100A116
- Fits: V100 series valve bodies (old style)
- UPC: 085267039659
- Category: Thermostatic Radiator Valve Parts


