| Connection Size: | EK20 x 3/8" |
|---|---|
| Product Type: | Loop Adapter |
| Material: | Brass |
| PEX Size: | 3/8" |
| Brass Alloy: | C46500 |
| Application: | Heating |
| Max Pressure (PSI): | 200 |
| Warranty: | 5 Year |
| Thread Type: | Female |
| Standards Met: | NSF ASTM F1960 ASTM F877 |
| Tubing Compatibility: | PEX-AL-PEX |
| Max Temp (F): | 200°F |
| Thread Size: | EK20 |
| Fitting System Compatibility: | PEX-AL-PEX Compression |

https://www.supplyhouse.com/PEX-Compression-Fittings-364000
yes that is the correct fitting
No, you need to use D4120500 fittings to connect 1/2" PEX-AL-PEX to TruFLOW manifolds.
These are adaptors that will work to secure any 1/2" pex-al-pex tubing to any manifold output threaded with 1/2" EK-20 threads. Reifing uses R-20, and so does wirsbo tru-flo. What I can't find a reference to is whether EK-20 & R-20 are the same. Will someone at Pexsupply be willing to try to fit one of these EK-20 nuts onto the output threads of a wirsbo manifold to answer this question? Alternatively, you can call Wirsbo directly and ask their tech support if the threads match. Also, make sure wirsbo manifolds will accept anything other than wirsbo tubing. At one time it seems to me they made a proprietary tubing Randy Danziger
EK20 is a European standard connector. Not sure of the connector specs on a Tru-Flow.