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Caleffi · 2026 catalog

521101A

Replacement union body 3.0

Weight1.9 lbFirst PDF occurrence57Official source ↗

Published catalog evidence

Exact manufacturer record

January 2026
Code
521101A
Description
Replacement union body 3.0
Catalog weight
1.9 lb
Published row
521101A Replacement union body 3.0 1.9 -

Verification boundary

What still needs to match

Do not infer interchange
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

8
2.4 lb521406A½" press union 3.02.5 lb521406AC½" press union, check valves 3.02.4 lb521506A¾" press union 3.02.5 lb521506AC¾" press union, check valves 3.02.6 lb521606A1" press union 3.03.1 lb521606AC1" press union, check valves 3.02.4 lb521409A½" sweat union 3.02.4 lb521409AC½" sweat union, check valves 3.0