Design was not right, (Wintering issue)
Hi there, i have a quick question as to how to get all the water out of my Backflow preventer, Wilkins Brand, i beleive is the name of it. I could not find any blow out port, directly after the BFP. Earlier this summer i was in the process of adding 4 more zones, which i did. At the very end on the new mainline i ran, (T'd off the existing) i added a 1" T with FPT for my compressor adapter i have.
I have a way to blow out the system now, but don't i need to shut off the two ball valves the Backflow preventer has before blowing air through the system....? There is 4 bolts directly in the center of this BFP, that i have contimplated taking off and hand drying the inside of this unit, is this a good idea or are they not meant to be opened by the consumer..? Please advise how to approach this situation, Thanks.