How to piggy back 2 100# propane tanks?

[toyoguy81]

I just finished installing a modine 50BTU propane heater in my pole barn. Currently its runng off one 100# tank outside. Ive been reading that I should be pig tailing 2 100# tanks so the regulator does not freeze. Any suggestions? Pics and parts needed would be appreciated

 

[pstnbly]

2 POL to POL pigtails into POL x POL x 1/2" flare T.

 

[Dustin Echoes]

Get a two stage regulator. runs off one tank, then turns over to the other and shows red on empty side. Good down past minus 40, and they're worth about $100.

I'm the guys who delivers said items, but I'm a little too far north for you!