Caleffi · 2026 catalog
573403A
½" NPT female union
Published catalog evidence
Exact manufacturer record
- Code
- 573403A
- Description
- ½" NPT female union
- Catalog weight
- 1.7 lb
- Published row
- 573403A ½" NPT female union 1.7 -
Verification boundary
What still needs to match
Function and seriesConfirm valve, separator, manifold, fill, control, backflow, or accessory function and exact series.
ConnectionsVerify NPT, sweat, press, PEX, flange or union connection type and size.
Hydronic dutyCheck pressure, temperature, flow/Cv, materials, seals, potable/hydronic approvals, and control compatibility.
InstallationConfirm orientation, envelope, service access, and current Caleffi documentation.
Related catalog codes
Same code prefix
5 lb573002A½" NPT female union in, ½" FNPT out5 lb573006A½" press union in, ½" press out5 lb573007A½" press union in, ½" FNPT out5 lb573009A½" sweat union in, ½" FNPT out1.7 lb573406A½" press union1.7 lb573409A½" sweat union1.7 lb573493A½" sweat union inlet, ½" FNPT union outlet1.7 lb573503A¾" NPT female union