SpudFiles

Posted: **Thu Aug 31, 2006 9:48 pm**

Been reading and searching the forums and various sites to make my first pneumatic air cannon. I've decided to use a sprinkler valve and PVC. So I was off to Home Depot's plumbing section and was taken aback by all the acronyms. Please help a guy out, I just want to make sure I understand it correctly ...

1) When looking for PVC pipes I want "Solid Core" SCH40 with XXX PSI @ 73 and NSF-PW (National something something-Potable Water?) on the pipe. This pipe is white. If it also says DWV is incidental.

2) When buying tees, couplers, bushings or reducers they must be marked NSF-PW rather than NSF-DWV. Do endcaps come in NSF-PW too ... only saw them in boxes marked NSF-DWV?

3) Orbit Watermasters are common and have no guide rod if you want to use a blowgun with it. Otherwise any sprinkler valve is good. I want to sleeve my cannon within a 4" SCH40 outer barrel so I am eyeing this compact Toro 3/4" sprinker valve. Box says 80-150PSI pressure rating.

<a href="http://www.homedepot.com/prel80/HDUS/EN ... 6">Shorten' your damn links!</a>

It has no backflow =? antisiphon =? backcheck, is that bad? Or is this valve too slow?

Thanks in advance!

Posted: **Thu Aug 31, 2006 9:54 pm**

1)yes that is fine.
2)All futtings need to be nsf-pw
3) get the inline valve.

Posted: **Thu Aug 31, 2006 10:05 pm**

1) It doesn't have to say "nsf-pw" it just has to have a pressure rating on it.

2) It's extremely hard to tell if fitting are pressure rated, at Home Depot if they say DWV they aren't. The pressure rated fittings are in boxes marked Sch. 40.

3) I've never used Toro, but I've had very good luck with Orbit. Also don't worry about guide rods, even if you get a valve with a guide rod you can still modify it easily.

Check out my "no drill" how-to on modifying a valve with a guide rod, flow control, and a bleed screw.

http://www.spudfiles.com/forums/viewtopic.php?t=2497&

The link doesn't work right, it just takes you to the garden center page.

Anti-Siphon doesn't do much for you. Unless you're making an over and under then it can save you a few fittings.

Also...

Welcome to the fourm!

Posted: **Fri Sep 01, 2006 8:32 am**

Thanks spudstuff and carl,

@Carlbelcher

I found a link to the valve at Toro. http://www.toro.com/sprinklers/valves/i ... 2053380%22

Home Depot lists this description.

Toro
3/4 In. In-Line Valve (Male Thread)

Model 53380

The Toro 3/4 In. In-Line Valve operates a flows as low as .5 GPM (gallons per minute.), making it ideal for drip irrigation zones. In-line valves can be installed below ground and housed in a plastic valve box which can be placed anywhere in the landscape without marring the view or disrupting maintenance activities. The Toro 3/4 In. In-Line Valve has an external bleed feature. External bleed is the best way to flush out dirt from the supply and lateral lines during new installations or repairs, because the water on top of the diaphragm is not vented back into the valve but instead onto the ground. This allows any debris to pass through the valve rather than becoming stuck in the valve. This feature is for those customers that like to turn on the valve at the manifold location for system check-ups or just extra watering and do not mind a little water on the ground at the valve location when the valve is operated in this manner.

• .5 - 15 GPM flow range
• 3/4 In. Male NPT inlet and outlet
• Stainless-steel diaphragm differential spring for smooth, positive closing
• 3 In. high x 4 In. wide

Internet/Catalog #100097873
Store In-Stock SKU # 167555

All other valves like the Orbit and Lawngenie were at least 5" tall with the solenoid on. I was hoping to put my cannon within a 4" tube so this model has me interested.

Posted: **Fri Sep 01, 2006 7:54 pm**

That sounds pretty good. Small and may have a guide rod, but you can use electric. The only thing that's weird about it is the male threads.

Posted: **Fri Sep 01, 2006 8:15 pm**

You could Pnuematicaly mod it and use a piece of extended tubing and put it through a hole to the outside of the cannon and fill the solonoid with epoxy

Posted: **Fri Sep 01, 2006 9:17 pm**

Small and may have a guide rod, but you can use electric.

Just because it has a guide rod doesn't mean that it can't be modified.

That valve should work just great. And if you do have any problems modifying it let me know because I can help.

Posted: **Fri Sep 01, 2006 10:56 pm**

one suggestion on the sprinkler valves, don't get the orbit watermaster with the jar top lid, it leaks alot. the other orbit watermaster valve (with the off centered soliniod) works great though. if you want the valve to be compact just pnuematicaly mod it then you wont need the solinoid any more and you will get alot better performence.

Posted: **Sat Sep 02, 2006 9:48 pm**

Switched to the 3/4 inch Orbit Watermaster because I couldn't find threaded adapters for the Toro. But now that I've gone to the Orbit, my original plan to sleeve the cannon has been put to the backburner. Now that's got me thinking, would it be better to switch to use a 1 inch sprinker instead or is that slower? Apparently most of the adapters the Home Depot stocks are 1 inch anyway.

Posted: **Sat Sep 02, 2006 9:55 pm**

The bigger the hole:The Higher the flow.

(Yes, go with the 1" valve)

Posted: **Sun Sep 03, 2006 3:27 pm**

Thanks, I bought the 1 inch Watermaster plus the male to female adapters for it. Found myself some rubber tire valves from Walmart and used metal stemmed ones from a friendly store clerk at a local tire store. Now comes the time to cut measure, clean, glue, and wait. Thanks all!

SpudFiles

Newbie buying parts out of Home Depot

Newbie buying parts out of Home Depot