winterization question (Sprinkler System)

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  #1  
Old 11-13-07, 10:48 PM
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winterization question (Sprinkler System)

I plan to winterize my sprinkler system myself. Now, the problem is that there is not a blow out tee after the backflow preventer. There is one before it (between the main shutoff and the backflow preventer). The backflow preventer is a febco 850 double check valve.

My question is, is it OK to blow the air through the backflow preventer? I'm going to keep the air pressure at about 50 psi consistantly.

Thanks!
 
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Old 11-14-07, 04:31 AM
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dguan, that drain valve will work fine, the only down side is the fact that you must drag a hose through the house or move the compressor to that area, or is it in a crawl space? doesn't really matter that valve port will work. You can also pressurize at the bac-flo by utilizing the 3/8 valve ports they feature that are normally opened with a screwdriver.
 
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Old 11-14-07, 08:34 AM
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Thank you Greenguy.

The system is outside in the yard and in a valve box underground. I just wasn't sure if it is ok to blow the pressured air through the backflow preventer. Some places said it'll melt the rubber ring or something in there...
 
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Old 11-15-07, 06:46 PM
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>>>Some places said it'll melt the rubber ring or something in there
 
 

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