presoak/tire cleaner

I am connecting my low pressure pre-soak and tire cleaner above the boom in Attic. I do not have heat in my attic and it is cold weather here, how I can proctect my low pressure tubes from frezzing.

If you insulate them together with the high-pressure line it might be enough to keep them from freezing; it will for sure if you do that and weep warm water.

I would try heat tape. I had a non insulated attic with pre-soak / tire cleaner lines for at least 10 years. To me, nothing worked without actually building a boxed trough with some kind of heat, floor heat tubing or a separate small hot water heater that would circulate through pex tubing. My old system was from Monorail with all of the solenoids and tees up above each boom with no heat. Each line ran from the equipment room to all of the bays then back to the equipment room constantly circulating. Once the attic temp got below 20 F it would always freeze. Still have the same setup, but built a closed box insulated with foam board around the solenoids and lines with a small hot water heater running pex alongside the pre soak tire cleaner lines. It has NEVER been frozen for the past 15 years no matter the outside temps.