59315-ELKHART is an official 3/4" x 1/8" x 3/4" CxFxC Baseboard Tee (Lead Free) for Elkhart Plumbing Supplies.
| Size: | 1/8" 3/4" 3/4" x 1/8" x 3/4" |
|---|---|
| Lead Free: | Yes |

A manual coin vent can go either way, a float vent should always be vertical.
You would need a copper fitting adapter. An example that works with the crimp connection system is SKU:H060750LF. Thanks
CPCBT-120212 is made out of cast brass and WPBT-120212 is made out of wrought brass.
An air eliminator at the boiler would be able to remove air for the whole system.
This part does not come with a screw. People generally use a Taco 417-3 coin vent in the 1/8" threaded opening.