The Spirotop is an automatic air bleed valve installed at the highest point in the circulated water system.
Can be installed on individual air handlers where the manual bleed is difficult to access, or at any local high point which makes bleeding the system difficult.
Spirotops simplify initial bleeding of the circulated water system and prevent air traps from forming where ever they are installed.
The unique separate float chamber design helps prevent leaks due to valve contamination.
Connection size is 1/2" FPT.