Does anyone know of a valve that can be set in units partial gallons per hour ?

[anewbie]

I want to setup a slow flow of water from a faucet at approx 1/2 to 2 gallons per hour but i can't find a valve that would allow such a setting. Anyone heard of such a beast ?

 

Related but slightly different is there a mixer that will allow setting flow from two input sources at precise fractions (i.e, 20% from source 1 and 80% from source 2 ) ?

[modified lung]

For your first question, you're looking for a drip irrigation emitter or flag dripper.

For your second, the easiest way is to have two separate valves and time how long it takes to fill a container from each. Then adjust them until they are letting out water at the ratio you want. For example, set them so one valve fills the cup in 5 seconds and the other fills it in 20 seconds.

If you want to be able to turn the mixer on and off without needing to resent the flows, add a second set of valves immediately after the first. The first valves will have the ratio set and the second can be opened and closed whenever.

[tolstoy21]

Check out dripworks.com for drip emitters. Their color-coded ones also contain a check valve (or something internal) that prevents back flow. 

https://www.dripworks.com/ceta-pc-emitters

i use those attached to standard RO tubing. You’ll also need a pressure regulator upstream of them so you don’t blow them off if your line pressure exceeds their rating.

https://www.dripworks.com/senninger-high-flow

Edited July 27, 2022 by tolstoy21

[anewbie]

Has anyone tried a 'meter valve'; they seem a bit pricey but would they be of any value here ?