Horizontal twist manifold adapter
The adapter is used on a direct mount system that domes off horizontally from the orifice fitting. Instead of using a 5 valve angle manifold, you would use this to make the angle from horizontal to vertical. The benefit with this design is that with a slight incline in porting inside the adapter, the condensation could flow back into the fitting and not pool in the angle adapter and be constantly drained (see our HM37 - 5 valve angle - it has drain ports on it). The design then prevents freezing if you forget to go out and drain it.