Shallow buried lines for yard hydrants

[LLigetfa]

I presently have one buried 3/4" (75 PSI rated) black poly pipe going out to a vegetable garden. Last year, we had a early frost and it froze and split where it came up out of the ground. I was able to cut out the last 18" of poly and added an 18" length of threaded rigid pipe between the hose barb and spigot. The wife always wants to put off winterizing the line until she is sure she won't need to do any more watering. The below ground pipe is just 6" deep so installing a freeze-proof yard hydrant probably makes no sense and I don't trust the wife to disconnect the hose for it to drain below ground level.

Now I am contemplating burying another line 150' to my driveway which is in the opposite direction and wonder if I should use 3/4" PEX A pipe instead of poly. Up until now I've just been stringing out garden hose which is a PITA. Mind you, at this new location there is no need to delay winterizing so maybe I should just stick with black poly pipe. I am considering burying a power cable as well so this water line would be set a foot deeper. Still not below frost but it may make sense to install a self-draining freeze-proof yard hydrant. To winterize, I blow the line with compressed air but was thinking that if some water stays in a section of buried pipe, PEX A would be less likely to split.

Thoughts?

 

[Jeff H Young]

run line deeper and put a stop and waste valve in

 

[Sponsor]

 

[LLigetfa]

run line deeper

The line to the garden goes across the septic field so it cannot be run deep enough. To go below the frost line, I would have to bury it 5 or 6 feet where there is not adequate snow cover. It is more than a 100' run. That's not going to happen.

 

[Jeff H Young]

stop and waste draian it befor frost