I'm guessing not, but has anyone seen a pressure release valve on the end of a drip manifold?
https://www.aliexpress.com/item/400...earchweb0_0,searchweb201602_,searchweb201603_
That's the fruit of much searching. If you understand ca fuel rails, you have this sussed already.
I use 1/2" hose, but just my short run holds 500ml. That's over a third of a watering session, as I'm every few hours in coco. That's the first third that gets used. The third that soaks out through the coco. They keep a lot of that 500ml which has sat in a hose, under my lights, for hours.
I use typical arrow drippers rated 2L per hour. That's if supplied with a Bar, and my pump is 1.4 Bar. I have 0.4 Bar's worth of pump spare.
I can put this spunding relief valve at the end of my line, and as the line pressure goes over it's set point (I choose the full 15psi/1Bar) the valve lets the excess pass. I can send it back to the tank, to aid mixing.
This means, some of the water that sat about for hours, goes back to the tank. Replaced in my manifold by water from the tank. Which is better maintained, using my aerator (I keep meaning to build a pneumatic dampener for, so I can use it)
This will also ensure, that as long as my pump can supply over a Bar, the drippers will see a Bar. It's a pressure compensating valve for the entire manifold. So as my filter fills, chipping away at my 1.4 Bar, the drip rate won't be effected.
It seems right... but I'm not seeing commercial applications in our industry. Then again, I don't see many pumps that can work a dripper properly either. We are poorly catered for, which is really quite surprising. Very few drip system users here will be able to reach the Bar that most kit is designed for. Though it only takes a fist sized $20 pump. With that in mind, my next level proposal is a Mars mission..
https://www.aliexpress.com/item/400...earchweb0_0,searchweb201602_,searchweb201603_
That's the fruit of much searching. If you understand ca fuel rails, you have this sussed already.
I use 1/2" hose, but just my short run holds 500ml. That's over a third of a watering session, as I'm every few hours in coco. That's the first third that gets used. The third that soaks out through the coco. They keep a lot of that 500ml which has sat in a hose, under my lights, for hours.
I use typical arrow drippers rated 2L per hour. That's if supplied with a Bar, and my pump is 1.4 Bar. I have 0.4 Bar's worth of pump spare.
I can put this spunding relief valve at the end of my line, and as the line pressure goes over it's set point (I choose the full 15psi/1Bar) the valve lets the excess pass. I can send it back to the tank, to aid mixing.
This means, some of the water that sat about for hours, goes back to the tank. Replaced in my manifold by water from the tank. Which is better maintained, using my aerator (I keep meaning to build a pneumatic dampener for, so I can use it)
This will also ensure, that as long as my pump can supply over a Bar, the drippers will see a Bar. It's a pressure compensating valve for the entire manifold. So as my filter fills, chipping away at my 1.4 Bar, the drip rate won't be effected.
It seems right... but I'm not seeing commercial applications in our industry. Then again, I don't see many pumps that can work a dripper properly either. We are poorly catered for, which is really quite surprising. Very few drip system users here will be able to reach the Bar that most kit is designed for. Though it only takes a fist sized $20 pump. With that in mind, my next level proposal is a Mars mission..
