[St3ve]

I'm looking to get a water pump (submersible or not) that will NOT siphon water when the pump is off. Meaning, I have a rez that is taller than the plants I want to water, so after the pump is turned off it will continue and allow water to be siphoned out of the rez.

does such a pump exist?

[PuReKnOwLeDgE]

Install a shutoff valve?

[Treetroit City]

Use an anti siphon fitting or just put a hole in your line that will drain back into rez

[CannabisTHC]

Put a small hole in your tubing above the water line in your res to allow air to enter the tube and stop the siphon. Problem solved without any money being spent.

If it starts spraying out of your res just add a 90 degree barb to the hole, remember you don't need a very big hole at all.

EDIT: whoops typing my post when you got the other 2 responses.

[rives]

I've never seen a pump with an attachment to accomplish that but you could install a vacuum breaker, preferably at the high point in the plumbing. It is a small valve that will shut when the line is pressurized, but pulls open under vacuum conditions in order to break the siphon. They can "burp" a little water as they close, so getting one with a fitting to contain and drain this water away is a good idea.

Simply putting a hole in the top of the pressure line at the high point, or plumbing a "T" and nipple with a pipe cap and bleed hole can accomplish the same thing if the pump volume and pressure are such that water won't be forced out of the hole when the pump is running.

https://www.mcmaster.com/#vacuum-brea...valves/=gw4tf3


*edit* Sheesh, you guys are on it today! Apparently I should check back when I get a phone call in the middle of posting.

[St3ve]

Awesome.. I have never thought of simply putting a hole in the hose.. simple, yet brilliant.

Thanks for the help, I love you guys.

[PoopyTeaBags]

do this... have your pump go up and put a 90 elbow on it.. in the center of the elbow grab a drill and drill a small hole in that elbow. Itll drain some water out when you turn it on and when you turn it off that little hole will stop the suction...

[PoopyTeaBags]

man you fuckers are fast today lol

[Hammerhead]

Simple answer is a check valve. Just find the size you need

https://www.amazon.com/MR-Aqua-Plasti...146373&sr=8-13

[rives]

Originally Posted by Hammerhead

Simple answer is a check valve. Just find the size you need

https://www.amazon.com/MR-Aqua-Plasti...146373&sr=8-13

Spring-loaded check valves can work in this application, but it requires balancing the spring tension vs. the vacuum exerted by the siphoning action. The type of check valve that you linked is to keep water out of air pump in case of power failure, and won't work in this application - the flow doesn't get reversed when the reservoir is higher than the discharge point, it just keeps going after the pump turns off because of the siphon effect.