DIY or not? Home irrigation project

[Syndil]

Hi everyone. I am in the planning stages of an irrigation project for four flowerbeds I have surrounding my house. The flowerbeds are already in place and are currently irrigated using soaker hoses that are buried in the mulch. Right now it's a manual process. I have to carry the garden hose to each soaker hose, connect it, then turn on the water.

My goal is to have water supplied to the soaker hoses automatically via a timer.

The house is on a crawl space. Currently the only outdoor plumbing is a single hose bibb on one side of the house. The house was built in 2008, and all supply pipes are PEX tubing.

I have a layout I am toying with in my head, but I do not know if there are any potential snags or obvious code violations, which is why I am here.

What I am thinking of doing it teeing off of the pipe the hose bibb is connected to using a PEX brass tee. Run a short length of PEX off the new tee, a check valve, then a PEX-to-PVC coupling. Once in PVC, I can build a manifold with four outlets to four new hose bibbs near each flowerbed, with each outlet on the manifold controlled electronically via standard yard irrigation valves wired to an irrigation timer.

Does this plan raise any red flags for anyone?

 

[phishfood]

Make sure that you use the atmospheric hose bib vacuum breakers on all of the hose bibs. The check valve helps with backflow prevention, but is not a fail safe mechanism.

 

[Syndil]

Thank you for the reply. I had not considered or even heard of an atmospheric hose bib vacuum breaker. One question about those... Will they be adversely affected by having their water supply turned off most of the time, since the electronic irrigation valves will be upstream of the hose bibs?

And now that I'm thinking of it, should I move the electronic valves closer to each of the hose bibs or leave them at a central manifold--does that matter?

Thanks again for your help.