Drip Setup Siphon

[ceosam]

I have a vertical reservoir and its height is causing my drip system emit water after the pump has stopped. How can I avoid this? I've talked to support at some of the drip irrigation stores and they weren't exactly helpful.

1" line to 3/4 poly with 1/4 & tophats

Pretty bummed... Everything else is working perfectly.

 

[Redbuddz]

there's a few things you could do. You could lower/move/change your reservoir or you could add an electric valve to control the flow of water.

 

[ceosam]

That's very unfortunate. I can't move the res and an electronic valve sounds terrible!

What about a double check valve or possibly a vertical deviation on the "push" side of the pump that went higher than the top level of the reservoir????

 

[stevewinthrop]

If the water level in the reservoir is higher than the height of the drip emitters, you will almost always form a siphon that won't stop.

Might be able to put a drip line at the point where the pipe leaves the reservoir, when the line is pressurized the water will flow out of it but when the pump is turned off it will break the siphon allowing air to populate the line.

 

[GreenhouseGrown]

You need to break the siphon above the reservoirs water line. tap a 1/4" plug above the water level and run tubing from there back into the reservoir above the water line.

 

[GreenhouseGrown]

If the water level in the reservoir is higher than the height of the drip emitters, you will almost always form a siphon that won't stop.

Might be able to put a drip line at the point where the pipe leaves the reservoir, when the line is pressurized the water will flow out of it but when the pump is turned off it will break the siphon allowing air to populate the line.

Lol

I took awhile to reply, you beat me to it.

 

[ceosam]

You need to break the siphon above the reservoirs water line. tap a 1/4" plug above the water level and run tubing from there back into the reservoir above the water line.

would i do this on the suck or pull side of the pump? im using a nonsubmersible

 

[ceosam]

http://www.sprinklerwarehouse.com/Febco-765-one-inch-p/fe765-100.htm

maybe i can install one of these on the output side of the pump, deviated above the pumps water line?

 

[stevewinthrop]

Suck and pull are the same side. If you are running an open topped res like a garbage can, put it at a few inches above the max water line of the res (the point you would fill the res up to). Now put a short piece of 1/4"OD drip tubing coming out of the main line so it will spray back into the res (but make sure the tubing doesn't touch the res water). So when the pump is running the tube sprays water back into the res, but when the pump shuts off, air will suck into the main line from the drip line.

It would be on the push side of the pump.

You should consider a submersible.

 

[Redbuddz]

I think steve has your answer but I'm curious why you think an electric valve is terrible?

 

[ceosam]

Red I just would prefer not to have another point of failure... Isn't that big a deal I know but it's just one more thing that can stop working -- I try to keep my setups as simple & effective as possible.

I will T off the 1" PVC on the pump outlet with a 1/2 return line back into the top of the res. Luckily I already have the T in place because I had planned on hooking up a garden hose for hand feeding.

 

[lvtokerr]

http://www.sprinklerwarehouse.com/Febco-765-one-inch-p/fe765-100.htm

maybe i can install one of these on the output side of the pump, deviated above the pumps water line?

i just ordered three to test them out. hopefully they work! they sound like they should work fine with our sometimes underpowered submersible pumps. only takes 1 psi to activate.

 

[ceosam]

I just like non submersibles. They fit in the res's I like to use like you see below -- they are narrow enough to fit through a bathroom doorway and you can fit 2 in a standard shower perfectly. 90gal chemical storage tanks -- 1" bulkhead fitting with on/off at the bottom

Let me know how it goes with those backflow preventers... I can manually run the pump until you get the answer

http://www.tank-depot.com/product.a...r=http://www.tank-depot.com/browse.aspx?id=15

http://www.amazon.com/Simer-2825SS-Portable-Transfer-Sprinkler/dp/B000HOV8RI

 

[MIMedHead]

Super easy fix. All you need is drill a hole in your res lid add grommet and elbow. Push elbow thru grommet and drill a small hole in the Elbow. Connect tubing from pump in rez to elbow and out to your drip lines. When your pump comes on it shoots a small stream of water back down to the water in red without much pressure lost and stops siphoning when pump turns off

 

[Asslover]

No need for any electric valves when a small hole in the feed line right above the highest water line in the rez is all you need. Once the pump shuts off air will get sucked into the line an break the vacuum.

 

[ceosam]

Non-submersible pump so I cannot do that, however I will put a tee on the pump outlet back to the res