i had a back flow preventer called a Febco 805Y Series Double Check Valve that has to be replaced. This model is no longer made. Does anyone know what would be a reasonable model to replace it with?

Watts is what is sold locally. The 007 is the model. Some check valves are fancier than others. Basic is fine.

The local irrigation supply will have a basic replacement.

My 2016 sprinkler system has a FEBCO 765-1 backflow preventer

thank you
it doesn't look like the 765 is an option for me. the valve itself is actually in a box partially below grade. the 007 seems to be the ticket so i'll look into it further.

*It's been a while but I used to be conversant on this stuff*

Local codes vary. On commercial dishwasher equipment you'll see a single check and vacuum breaker. When BF or more likely malfunction occurs water will spray out of the mushroom-shaped vacuum breaker assembly, sort of like the Febco 765.

The 765 is ideal in a temperate climate. Even if it will never freeze, some codes require the double-check.

There should be a union somewhere. Teflon tape trice around nipple threads and hand-tight is probably enough. With a union present you can always shut off the water and spin it around again. The union gets a thin smear of dope on the inside honed sealing surfaces but nothing on the threads; the union's threaded part pulls the honed surfaces together but the union's threads themselves are not the seal. No dope? Skip that step and see if it leaks.

Sometimes you have to reconfigure piping; a quick call to the building department will get you an answer to residential irrigation water supply requirements. I called a local municipality yesterday and the admin assistant who answered the phone knew that running an NG line to a pool required exiting the building above grade; I was impressed but then realized it must be a common question. So you can probably get answers without triggering an environmental impact review and teams of short-sleeve'd Covid-Clad code enforcement officers swarming your property.

The simple answer is go to the local Ferguson or other plumbing supply and ask for a back flow preventer for your irrigation system. They will most likely supply the local guys and will have on in stock.

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So you can probably get answers without triggering an environmental impact review and teams of short-sleeve'd Covid-Clad code enforcement officers swarming your property.

yes, something I wish to avoid.

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Originally posted by MikeinNC:
The simple answer is go to the local Ferguson or other plumbing supply and ask for a back flow preventer for your irrigation system. They will most likely supply the local guys and will have on in stock.

I would normally do that but the location of this property (Pt. Roberts, WA) makes that challenging these days. I'm hoping to order all the parts I need and have them sent there. I removed the old valve last fall and just capped the lines for the winter. Now it's time to get the system up and running again.