Return manifold.
Product Description
Return manifold.
Complete with built-in shut-off valve fitted for thermo-electric actuator.
Technical data
                        Maximum working pressure:
                        10 bar
                      
                                          
                        Medium temperature range:
                        0–80 °C
                      
                                          
                        Outlet centre distance:
                        50 mm
                      
                                      Download
Drawings and specifications
| Part number | Main connection | Outlet connection | |
|---|---|---|---|
| 666735S1 | G 1 1/4" (ISO 228-1) F | G 3/4" A (ISO 228-1) M 3 outlets | |
| 3D models Tender text 
                      CALEFFI, 666735S1.
Return manifold.
 Complete with built-in shut-off valve fitted for thermo-electric actuator.
 Main connection: G 1 1/4" (ISO 228-1) F. Outlet connection: G 3/4" A (ISO 228-1) M, 3 outlets, Connection for Caleffi fittings. Maximum working pressure: 10 bar. Medium temperature range: 0–80 °C. Outlet centre distance: 50 mm. 
                     SCIP code 
                          65dc7503-6bd0-4088-afb8-352bd822c706
                         | |||
| 666745S1 | G 1 1/4" (ISO 228-1) F | G 3/4" A (ISO 228-1) M 4 outlets | |
| 3D models Tender text 
                      CALEFFI, 666745S1.
Return manifold.
 Complete with built-in shut-off valve fitted for thermo-electric actuator.
 Main connection: G 1 1/4" (ISO 228-1) F. Outlet connection: G 3/4" A (ISO 228-1) M, 4 outlets, Connection for Caleffi fittings. Maximum working pressure: 10 bar. Medium temperature range: 0–80 °C. Outlet centre distance: 50 mm. 
                     SCIP code 
                          722a3010-b151-48c4-95e3-7035e251730c
                         | |||
| 666755S1 | G 1 1/4" (ISO 228-1) F | G 3/4" A (ISO 228-1) M 5 outlets | |
| 3D models Tender text 
                      CALEFFI, 666755S1.
Return manifold.
 Complete with built-in shut-off valve fitted for thermo-electric actuator.
 Main connection: G 1 1/4" (ISO 228-1) F. Outlet connection: G 3/4" A (ISO 228-1) M, 5 outlets, Connection for Caleffi fittings. Maximum working pressure: 10 bar. Medium temperature range: 0–80 °C. Outlet centre distance: 50 mm. 
                     SCIP code 
                          f7bb6b1c-8bcd-4ebf-a6b9-bb45154c0bcf
                         | |||
| 666765S1 | G 1 1/4" (ISO 228-1) F | G 3/4" A (ISO 228-1) M 6 outlets | |
| 3D models Tender text 
                      CALEFFI, 666765S1.
Return manifold.
 Complete with built-in shut-off valve fitted for thermo-electric actuator.
 Main connection: G 1 1/4" (ISO 228-1) F. Outlet connection: G 3/4" A (ISO 228-1) M, 6 outlets, Connection for Caleffi fittings. Maximum working pressure: 10 bar. Medium temperature range: 0–80 °C. Outlet centre distance: 50 mm. 
                     SCIP code 
                          08e43f43-6f3c-421d-9411-888bdeafd2da
                         | |||
| 666775S1 | G 1 1/4" (ISO 228-1) F | G 3/4" A (ISO 228-1) M 7 outlets | |
| 3D models Tender text 
                      CALEFFI, 666775S1.
Return manifold.
 Complete with built-in shut-off valve fitted for thermo-electric actuator.
 Main connection: G 1 1/4" (ISO 228-1) F. Outlet connection: G 3/4" A (ISO 228-1) M, 7 outlets, Connection for Caleffi fittings. Maximum working pressure: 10 bar. Medium temperature range: 0–80 °C. Outlet centre distance: 50 mm. 
                     SCIP code 
                          5d0b7b11-1d1d-45ea-adf6-6ee49553fcce
                         | |||
| 666785S1 | G 1 1/4" (ISO 228-1) F | G 3/4" A (ISO 228-1) M 8 outlets | |
| 3D models Tender text 
                      CALEFFI, 666785S1.
Return manifold.
 Complete with built-in shut-off valve fitted for thermo-electric actuator.
 Main connection: G 1 1/4" (ISO 228-1) F. Outlet connection: G 3/4" A (ISO 228-1) M, 8 outlets, Connection for Caleffi fittings. Maximum working pressure: 10 bar. Medium temperature range: 0–80 °C. Outlet centre distance: 50 mm. 
                     SCIP code 
                          eae9ac7d-2226-42f2-bc3c-4fb1dd1288e9
                         | |||
Faq - Frequent questions
How do you clean the glass of the flow meter of a manifold for an underfloor system?
To clean the flow meter glass, please read our article in the blog:
https://www.caleffi.com/it-it/blog/come-si-fa-pulire-il-flussimetro-di-un-collettore-impianti-pavimento
The series 668 manifolds have flow meters that cannot be serviced. If you mare unable to clean them by flushing water, they should be replaced with the spare part, code F69937.
 
   
           
         
         
       
      