Leaving outside faucet/sillcock on all the time

[B.A.]

Hello,
I currently have an Arrowhead 420 series frost free sillcock faucet on my house.
I'm located in MN.

I have the faucets hooked up to timers to water my gardens with low pressure irrigation.
As a result, I have to leave the faucet handles turned on all summer.

Last year I had to replace the stem of the Arrowhead faucets as they were leaking badly.
I shut off the water supply for the winter and disconnected hoses.
When I went to turn on the water yesterday, water is spraying from the weep hole in the stem when the faucet is turned on.

Champion Arrowhead's website states this problem is caused if:
worn out o-ring on the check assembly. This happens
over time or if the faucet is left “ON” for long periods of
time (over 12 hrs)

I just replaced the complete stem last year. Apparently they really aren't designed for this application (Being left on 24/7)?

Are there any other manufacturers of frost-free outdoor faucets which can be left on 24/7 without causing these problems?

The water line run to the faucets is Wirsbo 1/2". Is it hard to change from the Arrowhead to a different product without opening walls and ceilings?

Thank you for the assistance

 

[B.A.]

Correction - supply is a Wirsbo 3/4" line

 

[Sponsor]

 

[NPMSTR]

All outside wall faucets that are code approved (have vacuum breakers & backflow preventors) have this requirement, not for continual usage. Many manufacturers make valves without vacuum breakers and backflow preventors but if you install one you open yourself and your neighborhood up the possibility of contamination of the potable water system.

 

[Reach4]

You might be able to just wash out the debris and put the vacuum breaker back.

http://champion-arrowhead.com/index.php/arrowhead/part-kits/pk1430.html
maybe you can just identify a compatible o-ring and replace that.

 

[Sylvan]

Hose bib (Non frost prof) and place this on the end DO NOT tighten the tamper proof screw so it can be replaced when and if it fails

You have to shut a valve in doors and drain it yearly

https://www.plumbmaster.com/watts-w...2EkGm4bG5B2VNw0dNK7eTUtDjqp6DUpRoCP0IQAvD_BwE