I had not considered that possibility, the horizontal nipples will screw INTO a standard threaded PVC Tee? Very convenient!!
That would work with what I did to insulate my horizontal 3/4" pipe in the bottom of the nest box. The ONLY thing that is visible under the bottom of the nest box is the metal pins and they don't usually freeze above about -15F. The water in those temps is heated to high 70s F with a submersible aquarium heater (water continuously circulated by a VERY small reptile waterfall pump). The stock tank heater only works to about +15F. The container is a 5 gallon insulated Igloo drink "cooler". But when several nipples leaked out I had to deconstruct the box to replace them. That was NOT in any plan I had. I figure if I need to make a new one, it will be a separate unit with horizontal nipples since people seem to have good luck with them not freezing. Being able to screw the horizontal nipples into Tees would make it super easy to insulate the pipe inside a plywood "box" that could be mounted wherever it is needed.
That would work with what I did to insulate my horizontal 3/4" pipe in the bottom of the nest box. The ONLY thing that is visible under the bottom of the nest box is the metal pins and they don't usually freeze above about -15F. The water in those temps is heated to high 70s F with a submersible aquarium heater (water continuously circulated by a VERY small reptile waterfall pump). The stock tank heater only works to about +15F. The container is a 5 gallon insulated Igloo drink "cooler". But when several nipples leaked out I had to deconstruct the box to replace them. That was NOT in any plan I had. I figure if I need to make a new one, it will be a separate unit with horizontal nipples since people seem to have good luck with them not freezing. Being able to screw the horizontal nipples into Tees would make it super easy to insulate the pipe inside a plywood "box" that could be mounted wherever it is needed.